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  • 51.
    Jarlemark, Per
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Johansson, Jan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Bergstrand, Sten
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Massa, kraft, längd och tryck.
    Lidberg, Martin
    Jonsson, Bertil
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Byggnadsfysik och innemiljö (ETi ).
    Measurement accuracy in Network-RTK2010In: Bolletino di Geodesia e Scienze Affini, Vol. 69, p. 2-3Article in journal (Other academic)
  • 52.
    Jarlemark, Per
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Johansson, Jan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Elgered, Gunnar
    Ground-Based GPS for Validation of Climate Models: The Impact of Satellite Antenna Phase Center Variations2010In: IEEE Transactions on Geoscience and Remote Sensing, ISSN 0196-2892, E-ISSN 1558-0644, Vol. 48, p. 3847-3854Article in journal (Refereed)
  • 53.
    Jarlemark, Per
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Nilsson, Tobias
    Vienna University of Technology, Austria.
    Ning, Tong
    Chalmers University of Technology, Sweden.
    Elgered, Gunnar
    Chalmers University of Technology, Sweden.
    Willén, Ulrica
    SMHI, Sweden.
    Kjellström, Erik
    SMHI, Sweden.
    Evaluation of climate models using ground-based GNSS observations2013In: Proceedings of the 16th General Assembly of the Nordic Gedetic Commission, 2013, , p. 107-114Conference paper (Other academic)
  • 54.
    Jarlemark, Per
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Graziani, A
    Tortora, P
    Elgered, G
    Martellucci, A
    Merolino, M
    A simulation tool for assessing the influence of atmospheric turbulence in a Media Calibration System2012In: 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment, MicroRad 2012 - Proceedings, 2012, , p. 6185260Conference paper (Refereed)
  • 55.
    Jarlemark, Per
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Ning, Tong
    Johansson, Jan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Scherneck, Hans-Georg
    High-Rate GNSS Techniques for the Detection of Large Seismic Displacements2009In: Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009 (Volume:5, 2009, , p. V359-V362Conference paper (Other academic)
  • 56.
    Jarlemark, Per
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Tortora, P
    Crewell, S
    Elgered, Gunnar
    Graziani, A
    Löhnert, U
    Martellucci, A
    Mercolino, M
    Ning, Tong
    Rose, T
    Schween, J
    Lanucara, M
    Instruments, data and techniques for the assessment of tropospeheric noise in deep space tracking2012In: Antennas and Propagation (EUCAP), 2012 6th European Conference on, 2012, , p. 106-110Conference paper (Refereed)
  • 57.
    Johansson, Jan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Nilsson, Håkan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Jaldehag, Kenneth
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Korrekt tid och säker tidsangivning.2005Report (Refereed)
  • 58.
    Kharezy, Mohammad
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Elektricitet.
    Lindgren, Mikael
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Fiberoptic sensors for high-voltage applications1981Report (Refereed)
    Abstract [en]

    SP has experience in the field of fiberoptic communication and expertise in research in the field. Also, SP has expertise in the high-voltage field and there is currently a large interest in developing the high-voltage network in order to accommodate new small producers of electric power (wind mills, solar power, etc.) In this report we describe efforts to find areas of interest to develop fiberoptic sensors for offshore monitoring of high-voltage equipment. A large number of research papers and review articles have been collected and reviewed in order to investigate what possibilities are at hand for SP to provide support for development of new or existing fiberoptic sensor technologies.

    Download full text (pdf)
    FULLTEXT01
  • 59.
    Källberg, Stefan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Lindahl, Martin
    Metod för att bedöma optisk strålning2013In: Svetsen, no 3, p. 36-38Article in journal (Other (popular science, discussion, etc.))
  • 60.
    Källberg, Stefan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Lindahl, Martin
    Metod för bedömning av optisk strålning2013In: Verkstäderna, no 10, p. 46-50Article in journal (Other (popular science, discussion, etc.))
  • 61.
    Källberg, Stefan
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Lindgren, Mikael
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Artificiell optisk strålning i svensk industri2013Report (Refereed)
    Download full text (pdf)
    FULLTEXT01
  • 62.
    Lönnermark, Anders
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Brandteknik, skydd (BRs ).
    Hedekvist, Per Olof
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Ingason, Haukur
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Brandteknik, skydd (BRs ).
    Gas temperature measurements using fibre Bragg grating during fire experiments in a tunnel2008In: Fire Safety Journal, no 43, p. 119-126Article in journal (Refereed)
  • 63.
    Merlone, Andrea
    et al.
    INRIM Istituto Nazionale di Ricerca Metrologica, Italy.
    Lopardo, Giuseppina
    INRIM Istituto Nazionale di Ricerca Metrologica, Italy.
    Francesca, Sanna
    CNR Consiglio Nazionale delle Ricerche, Italy.
    Bell, Stephanie A.
    NPL National Physical Laboratory, UK.
    Benyon, Robert
    Instituto Nacional de Técnica Aeroespacial, Spain.
    Bergerud, Reidun Anita
    Justervesenet, Norway.
    Bertiglia, Fabio
    INRIM Istituto Nazionale di Ricerca Metrologica, Italy.
    Bojkovski, Jovan
    University of Ljubljana, Slovenia.
    Böse, Norbert
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    Brunet, Manola
    Rovira i Virgili University, Spain.
    Cappella, Andrea
    LNE Laboratoire national de métrologie et d'essais, France.
    Coppa, Graziano
    INRIM Istituto Nazionale di Ricerca Metrologica, Italy.
    Del Campo, Dolores
    CEM Centro Espanol de Metrologia, Spain.
    Dobre, Miruna
    SMD Service Métrologie Scientifique, Belgium.
    Drnovšek, Janko
    University of Ljubljana, Slovenia.
    Ebert, Volker
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Fernicola, Vito
    INRIM Istituto Nazionale di Ricerca Metrologica, Italy.
    Flakiewicz, Krzysztof
    Ministry of Economy, Poland.
    Gardiner, Thomas
    NPL National Physical Laboratory, UK.
    García-Izquierdo, Carmen
    CEM Centro Espanol de Metrologia, Spain.
    Georgin, Éric
    LNE Laboratoire national de métrologie et d'essais, France.
    Gilabert, Alba
    University Rovira i Virgili, Spain.
    Grykałowska, Agnieszka
    Włodzimierz Trzebiatowski Institute of Low Temperature and Structure Research, Poland.
    Grudniewicz, Elżbieta
    GUM Central Office of Measures, Poland.
    Heinonen, Martti
    MIKES Centre for Metrology and Accreditation, Finland.
    Holmsten, Magnus
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Hudoklin, Domen
    University of Ljubljana, Slovenia.
    Johansson, Jan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik. Chalmers University of Technology, Sweden.
    Kajastie, Heikki
    MIKES Centre for Metrology and Accreditation, Finland.
    Kaykisizli, Hakan
    TÜBİTAK UME National Metrology Institute, Turkey.
    Klason, Peter
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Kňazovická, Lenka
    CMI Czech Metrology Institute, Czech Republic.
    Lakka, Antti
    MIKES Centre for Metrology and Accreditation, Finland.
    Kowal, Aleksandra
    Wlodzimierz Trzebiatowski Institute of Low Temperature and Structure Research, Poland.
    Müller, Harald
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    Musacchio, Chiara
    INRIM Istituto Nazionale di Ricerca Metrologica, Italy.
    Nwaboh, Javis Anyangwe
    PTB Physikalisch-Technische Bundesanstalt, Germany.
    Pavlásek, Peter
    Slovak Institute of Metrology, Slovakia.
    Piccato, Aline
    INRIM Istituto Nazionale di Ricerca Metrologica, Italy.
    Pitre, Laurent
    LNE Laboratoire National de Métrologie et d'Essais, France.
    de Podesta, Michael
    Instituto Nacional de Técnica Aeroespacial, Spain.
    Rasmussen, Morten K.
    Danish Technological Institute, Denmark.
    Sairanen, Hannu
    MIKES Centre for Metrology and Accreditation, Finland.
    Smorgon, Denis
    Karlsruhe Institute of Technology, Germany.
    Sparasci, Fernando
    LNE Laboratoire National de Métrologie et d'Essais, France.
    Strnad, Radek
    CMI Czech Metrology Institute, Czech Republic.
    Szmyrka- Grzebyk, Anna
    Włodzimierz Trzebiatowski Institute of Low Temperature and Structure Research, Poland.
    Underwood, Robin
    NPL National Physical Laboratory, UK.
    The MeteoMet project – metrology for meteorology: challenges and results2015In: Meteorological Applications, ISSN 1350-4827, E-ISSN 1469-8080, Vol. 22, no S1, p. 820-829Article in journal (Refereed)
    Abstract [en]

    The study describes significant outcomes of the ‘Metrology for Meteorology’ project, MeteoMet, which is an attempt to bridge the meteorological and metrological communities. The concept of traceability, an idea used in both fields but with a subtle difference in meaning, is at the heart of the project. For meteorology, a traceable measurement is the one that can be traced back to a particular instrument, time and location. From a metrological perspective, traceability further implies that the measurement can be traced back to a primary realization of the quantity being measured in terms of the base units of the International System of Units, the SI. These two perspectives reflect long-standing differences in culture and practice and this project – and this study – represents only the first step towards better communication between the two communities. The 3 year MeteoMet project was funded by the European Metrology Research Program (EMRP) and involved 18 European National Metrological Institutes, 3 universities and 35 collaborating stakeholders including national meteorology organizations, research institutes, universities, associations and instrument companies. The project brought a metrological perspective to several long-standing measurement problems in meteorology and climatology, varying from conventional ground-based measurements to those made in the upper atmosphere. It included development and testing of novel instrumentation as well as improved calibration procedures and facilities, instrument intercomparison under realistic conditions and best practice dissemination. Additionally, the validation of historical temperature data series with respect to measurement uncertainties and a methodology for recalculation of the values were included.

  • 64.
    Olofson, Jan Yngve
    et al.
    University of Gothenburg, Sweden.
    Houltz, Birgitta K.
    University of Gothenburg, Sweden.
    Nilsson Tengelin, Maria
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Bake, Björn
    University of Gothenburg, Sweden.
    Respiratory symptoms and peripheral airways disease in a cross-sectional study on a random population sample2012In: BMJ Open, E-ISSN 2044-6055, Vol. 2, no 6, article id e001488Article in journal (Refereed)
    Abstract [en]

    Objectives: Respiratory symptoms are associated with spirometry results but more strongly with smoking history, suggesting that alterations in the lung other than those revealed by spirometry contribute to cause symptoms. Smoking may cause obstruction of peripheral airways that is poorly detected by spirometry. The slope of phase III of the single-breath nitrogen (N2) test detects smoking-induced alterations in smokers before spirometry is impaired. The aim of the present investigation was to study the association between respiratory symptoms and the slope of phase III adjusting for spirometry results and smoking history. Design: Single-centre retrospective cross-sectional study. Setting: University hospital in Gothenburg, Sweden. Participants: A random population sample of 430 elderly men. Methods: The presence of seven different respiratory symptoms were analysed by a multiple logistic regression model in relation to spirometry results, smoking history (pack-years) and the slope of phase III in a population sample of 430 elderly men, age span 50-67 years. Furthermore, smoking normalised values of the slope of phase III were calculated and differences between subjects reporting/not reporting symptoms were tested. Results: The presence of some cough symptoms was significantly associated with a steep slope of phase III also when adjusting for spirometry results and smoking history. Furthermore, smoking normalised slope of phase III was significantly steeper among subjects with cough symptoms compared to those without cough symptoms. Conclusions: Cough symptoms may be an effect of abnormalities in peripheral airways at least among elderly men.

  • 65.
    Pendrill, Leslie
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Andersson, Anne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Löfdahl, Gunn-Mari
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
    Linkova, Marcela
    Ptackova, Katerina
    Henson, Andy
    Lea, Deborah
    Kovrzková, Jana
    Havrlantová, Silvie
    T2.8 - Social and ethical issues of metrology Deliverable D2.11. Recommendations to imporove the gender balance in European metrology.2007Report (Refereed)
  • 66.
    Pendrill, Leslie
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Measurement with Persons: A European Network2010In: NCSLi Measure, Vol. 5, no 2, p. 42-55Article in journal (Refereed)
    Abstract [en]

    The European ‘Measuring the Impossible’ Network MINET promotes new research activities in measurement dependent on human perception and/or interpretation. This includes the perceived attributes of products and services, such as quality or desirability, and societal parameters such as security and well-being. Work has aimed at consensus about four ‘generic’ metrological issues: (1) Measurement Concepts & Terminology; (2) Measurement Techniques: (3) Measurement Uncertainty; and (4) Decision-making & Impact Assessment, and how these can be applied specifically to the ‘Measurement of Persons’ in terms of ‘Man as a Measurement Instrument’ and ‘Measuring Man.’ Some of the main achievements of MINET include a research repository with glossary; training course; book; series of workshops; think tanks and study visits, which have brought together a unique constellation of researchers from physics, metrology, physiology, psychophysics, psychology and sociology. Metrology (quality-assured measurement) in this area is relatively underdeveloped, despite great potential for innovation, and extends beyond traditional physiological metrology in that it also deals with measurement with all human senses as well as mental and behavioral processes. This is particularly relevant in applications where humans are an important component of critical systems, where for instance health and safety are at stake.

    Download full text (pdf)
    fulltext
  • 67.
    Pendrill, Leslie
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Farbrot, Anne
    Abbas, Shabira
    Nihlstrand, Anna
    Measurements with persons: a European network. Case study healthcare products2011Conference paper (Other academic)
  • 68.
    Pendrill, Leslie
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Jarlemark, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Björkdahl Sundling, Catherine
    Nilsson, Mats
    Berglund, Birgitta
    Measurement of Accessibility to rail transport systems2011Conference paper (Other academic)
  • 69.
    Prasad, Ankur
    et al.
    Chalmers University of Technology, Sweden.
    Fager, Christian
    Chalmers University of Technology, Sweden.
    Thorsell, Mattias
    Chalmers University of Technology, Sweden.
    Andersson, Cristina M.
    Mitsubishi, Japan.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Symmetrical large-signal modeling of microwave switch FETs2014In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 62, no 8, p. 1590-1598Article in journal (Refereed)
    Abstract [en]

    This paper presents a new symmetrical field-effect transistor (FET) model suitable for microwave switches. The model takes advantage of the inherent symmetry of typical switch devices, justifying a new small-signal model where all intrinsic model parameters can be mirrored between the positive and negative drain-source bias regions. This small-signal model is utilized in a new and simplified approach to large-signal modeling of these type of devices. It is shown that the proposed large-signal model only needs a single charge expression to model all intrinsic capacitances. For validation of the proposed model, small-signal measurements from 100 MHz to 50 GHz and large-signal measurements at 600 MHz and 16 GHz, are carried out on a GaAs pHEMT. Good agreement between the model and the measurements is observed under both small- and large-signal conditions with particularly accurate prediction of higher harmonic content. The reduced measurement requirements and complexity of the symmetrical model demonstrates its advantages. Further, supporting operation in the negative drain-source voltage region, the model is robust and applicable to a variety of circuits, e.g., switches, resistive mixers, oscillators, etc.

  • 70.
    Prasad, Ankur
    et al.
    Chalmers University of Technology, Sweden.
    Fager, Christian
    Chalmers University of Technology, Sweden.
    Thorsell, Mattias
    Chalmers University of Technology, Sweden.
    Andersson, Cristina M.
    Mitsubishi, Japan.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation. Chalmers University of Technology, Sweden.
    Symmetrical modeling of GaN HEMTS2014In: Compound Semiconductor Integrated Circuit Symposium (CSICs, 2014, , p. 4Conference paper (Other academic)
    Abstract [en]

    This paper presents a symmetrical small signal model for GaN HEMTs valid for both positive and negative Vds. The model takes advantage of the intrinsic symmetry of the devices typically used for switches. The parameters of the model are extracted using a new symmetrical optimization based extraction method, optimizing simultaneously for both positive and negative drain-source bias points. This ensures a symmetrical small signal model with lower modeling error. The small signal model can be further used to simplify the development of a large-signal model. The small signal model is validated with measured S- parameters of a commercial GaN HEMT.

  • 71.
    Rieck, Carsten
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Haas, Rüdiger
    Jaldehag, Kenneth
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Johansson, Jan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    VLBI and GPS-based Time-Transfer Using Cont08 Data2010In: 6th IVS General Meeting, 2010, , p. 365-369Conference paper (Other academic)
  • 72.
    Rieck, Carsten
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Haas, Rüdiger
    Jaldehag, Kenneth
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Johansson, Jan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    VLBI time-transfer using Cont08 Data2010Conference paper (Other academic)
  • 73.
    Rieck, Carsten
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Jaldehag, Kenneth
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik. Chalmers University of Technology, Sweden.
    A hardware accelerated 10GbE primary NTP-server2012In: European Frequency and Time Forum, EFTF 2012, 2012, , p. 387-391p. 387-391, article id 6502408Conference paper (Refereed)
    Abstract [en]

    In this paper we present a primary NTP server design that provides a full line rate packet stream handling with about 50 ns internal timing accuracy independent from packet throughput. The provided solution is replay proof and is intended for NTP services close to backbone of the Internet.

  • 74.
    Rieck, Carsten
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Jaldehag, Kenneth
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Jarlemark, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Haas, Rüdiger
    VLBI Frequency Transfer using CONT112012In: European Frequency and Time Forum (EFTF 2012), 2012, , p. 163-165p. 163-165, article id 6502358Conference paper (Refereed)
    Abstract [en]

    Geodetic VLBI is an independent technique, which does not rely on third parties. This makes it a viable future alternative for time- and frequency transfer over long baselines. Frequency link instabilities in the order of 1.5e-15 for time periods of one day are comparable to those achievable with methods using GNSS carrier-phase observations. Data of the continuous VLBI campaign CONT11 were analyzed and compared to results from GPS PPP analysis on collocated/common clock stations.

  • 75.
    Rieck, Carsten
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Jarlemark, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Haas, Rüdiger
    VLBI and GNSS Frequency Link Instabilities during CONT Campaigns2012In: IVS 2012 General Meeting Proceedings, 2012, , p. 425-429Conference paper (Other academic)
  • 76.
    Ruud, Svein
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi, Klimatisering och installationsteknik.
    Markusson, Caroline
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi, Klimatisering och installationsteknik.
    Nordén, Johan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Hållbar Samhällsbyggnad, Byggnadsfysik och innemiljö.
    Karlsson, Henrik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Byggnadsfysik och innemiljö (ETi ).
    Lindgren, Mikael
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Ollas, Patrik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi, Klimatisering och installationsteknik.
    Belysningen väg från el till rumstemperatur2013Report (Refereed)
    Download full text (pdf)
    FULLTEXT01
  • 77.
    Steinmetz, Erik
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Ahlstrom, Christer
    Victor, Trent
    Wege, Claudia
    Processing of Eye/Head-Tracking Data in Large-Scale Naturalistic Driving Data Sets2012In: IEEE Transactions on intelligent transportation systems, Vol. 13, no 2, p. 553-64Article in journal (Refereed)
  • 78.
    Steinmetz, Erik
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Eriksson, Henrik
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik, Pålitliga system.
    Hérard, Jacques
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik, Pålitliga system.
    Jacobson, Jan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Elektronik, Pålitliga system.
    High Precision Control of Active Safety Test Scenarios2011Report (Refereed)
    Download full text (pdf)
    FULLTEXT01
  • 79.
    Steinmetz, Erik
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Hult, Robert
    Chalmers University of Technology, Sweden.
    de Campos, Gabriel Rodrigues
    Chalmers University of Technology, Sweden.
    Wildemeersch, Matthias
    Singapore University of Technology and Design, Singapore.
    Falcone, Paolo
    Chalmers University of Technology, Sweden.
    Wymeersch, Henk
    Chalmers University of Technology, Sweden.
    Communication analysis for centralized intersection crossing coordination2014In: 11th International Symposium on Wireless Communications Systems, ISWCS 2014 - Proceedings., 2014, , p. 813-818p. 813-818, article id 6933465Conference paper (Refereed)
    Abstract [en]

    Coordination of autonomous cooperative vehicles is an important challenge for future intelligent transportation systems. In particular, coordination to cross intersections captures the inherent and connected challenges among control and communication. While intersection coordination and vehicular wireless communication have both received extensive treatment in their respective communities, few works consider their interaction. We provide a communication system analysis for the specific problem of centralized intersection crossing coordination, leading to design guidelines for both uplink (whereby vehicles send intentions to the central controller) and downlink (where the controller prescribes vehicles of safe control actions).

  • 80.
    Steinmetz, Erik
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Jarlemark, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Skoogh, Håkan
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Herbertsson, Magnus
    RISE Research Institutes of Sweden, Safety and Transport, Measurement Technology.
    Assessment of GPS derived speed for verification of speed measuring devices2014In: Int. J. of Instrumentation Technology, ISSN 2043-7854, Vol. 1, p. 212-227Article in journal (Refereed)
    Abstract [en]

    Speed information from GPS is increasingly used and provides an alternative to conventional methods such as wheel speed sensors. We investigate the possibility to use GPS derived speed as a reference when verifying laser and radar-based speed measuring devices used in traffic enforcement. We have set up a realistic test scenario where a GPS equipped vehicle was driven at three different speeds (40, 90 and 130 km/h) through a pre-defined measurement zone. An independent and traceable reference speed was calculated by accurately measuring the length of the measurement zone (approximately 15 metres), and the time it took to pass through it. The reference speed was compared to the average GPS speed for each passage. This comparisons show that the standard uncertainty of such GPS speed measurements is less than 0.05 km/h. Hence, GPS derived speed meets the accuracy requirements for verification of laser and radar based speed measuring devices.

  • 81.
    Stenarson, Jörgen
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation. Chalmers University of Technology, Sweden.
    HFTools - An open source python package for microwave engineering2014In: CPEM 2008, Conference on Precision Electromagnetic Measurements. Mainz. 2008-06-08, 2014, , p. 6899531article id 6899531Conference paper (Refereed)
    Abstract [en]

    This paper presents HFTools an open source python package for microwave engineering. The focus of the development of the package at this time is fundamental tools, e.g. file IO, dataset object, array object, and multiport object. The basic HFTools package contains tools for reading data files in several common formats, e.g. touchstone, mdif, and citi. The package also contains tools for conversion of multi-port parameters. The paper presents the capabilities of the package by a series of short examples.

  • 82.
    Stenarson, Jörgen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Do, Thanh Ngoc Thi
    Chalmers University of Technology, Sweden.
    Zhao, Huan
    Chalmers University of Technology, Sweden.
    Sobis, Peter
    Chalmers University of Technology, Sweden; Omnisys Instruments AB, Sweden.
    Tang, Aik Yean
    Chalmers University of Technology, Sweden.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Stake, Jan
    Chalmers University of Technology, Sweden.
    Sensitivity Analysis of TRL Calibration in Waveguide Integrated Membrane Circuits2013In: IEEE Transactions on Terahertz Science and Technology, ISSN 2156-342X, Vol. 3, no 5, p. 558-565Article in journal (Refereed)
    Abstract [en]

    We present a sensitivity analysis on TRL calibrated S-parameter measurements of membrane circuits in the WR-03 waveguide band (220-325 GHz). The impact of waveguide and membrane circuit misalignment, as well as waveguide dimension mismatch is investigated. The analysis is performed for the thru-reflect-line (TRL) calibration applied to E-plane split waveguide blocks carrying membrane circuits. The analysis shows a large influence of the waveguide width tolerance on transmission and reflection phase after the TRL calibration. For a 20 mm long rectangular waveguide with a ± 5 µm width tolerance a phase uncertainty as large as ± 45° for reflection and ± 30° for transmission measurements is observed.

  • 83.
    Stenarson, Jörgen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Melberg, Anders
    An evaluation of three simple scalable MIM capacitors models2006In: IEEE Transactions on Microwave Theory and Techniques, Vol. 54, no 1, p. 169-172Article in journal (Refereed)
  • 84.
    Stenarson, Jörgen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    A reformulation and stability study of TRL and LRM using S-parameters2009In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 57, no 11, p. 2800-2807Article in journal (Refereed)
    Abstract [en]

    This paper derives a unified TRL and LRM calibration algorithm using S-parameters instead of traditional Tparameters. The advantage of this approach is that we get a solution where LRM is an integral part of the TRL algorithm. The expression for the transmission coefficient of the line standard has the convenient property that in many cases the transmission coefficient is obtained directly without a need for a root choice.

  • 85.
    Stenarson, Jörgen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    A reformulation of TRL and LRM for S-parameters2009In: proceedings of CPEM 2008, Conference on Precision Electromagnetic Measurements. 2008-06-08, 2009, , p. 4Conference paper (Refereed)
    Abstract [en]

    This paper derives the TRL and LRM calibration algorithms using S-parameters instead of the traditional T-parameters. The advantage of this approach is that they do not need separate solutions. Instead LRM becomes an integral part of the TRL algorithm. The expression for the transmission coefficient of the line standard has the surprising property that in many cases the transmission coefficient is obtained directly without a need for a root choice.

  • 86.
    Stenarson, Jörgen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Uncertainty Propagation Through Network Parameter Conversions2009In: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, E-ISSN 1557-9662, Vol. 58, no 4, p. 6-Article in journal (Refereed)
    Abstract [en]

    This paper describes a simplified procedure to obtain the uncertainties when converting a set of network parameters to another form. The method is based on a general matrix transformation technique. The technique relies on a transformation matrix that describes the relation between two network parameter definitions and two matrix equations. This paper extends the technique with two new matrix equations to also transform the uncertainties in the network parameters by relying on the same transformation matrix. The proposed method is exemplified by the conversion of S-parameter measurements with uncertainty (of a 30-dB attenuator) to G21 with uncertainty. The proposed method for uncertainty conversion is also compared with an analytic expression for S-parameter to G21 conversion.

  • 87.
    Stenarson, Jörgen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Uncertainty Propagation Through Network Parameter Conversions2008In: CPEM 2008, Conference on Precision Electromagnetic Measurements. 2008-06-08, IEEE , 2008Conference paper (Refereed)
    Abstract [en]

    This paper describes a simplified procedure to obtain the uncertainties when converting a set of network parameters to another form. The method is based on a general matrix transformation technique. The technique relies on a transformation matrix that describes the relation between two network parameter definitions and two matrix equations. This paper extends the technique with two new matrix equations to also transform the uncertainties in the network parameters by relying on the same transformation matrix. The proposed method is exemplified by the conversion of S-parameter measurements with uncertainty (of a 30-dB attenuator) to G 21 with uncertainty. The proposed method for uncertainty conversion is also compared with an analytic expression for S-parameter to G 21 conversion.

  • 88.
    Stenarson, Jörgen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik. Chalmers University of Technology, Sweden.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation. Chalmers University of Technology, Sweden.
    Do, Thanh Ngoc Thi
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik. Chalmers University of Technology, Sweden.
    Zhao, Huan
    Chalmers University of Technology, Sweden.
    Sobis, Peter J.
    Chalmers University of Technology, Sweden; Omnisys Instruments AB, Sweden.
    Stake, Jan
    Chalmers University of Technology, Sweden.
    Influence of waveguide width errors on TRL and LRL calibrations2012In: 79th ARFTG Microwave Measurement Conference: Non-Linear Measurement Systems, 2012, , p. 6291182article id 6291182Conference paper (Refereed)
    Abstract [en]

    This paper investigates the impact of the waveguide width tolerance in TE 10 mode waveguide TRL/LRL calibration kits. This is important for vector network analyzer measurements in the THZ range where waveguide tolerances become large compared the wavelength and to cross sectional dimensions. Besides causing reflections in the waveguide interface, the waveguide width tolerance also causes a change in the propagation constant that can shift the reference planes and cause problems in estimating the propagation constant of the Line standard. We conclude that the tolerances may cause a significant uncertainty contribution and may limit the useful band of the calibration kit.

  • 89.
    Stenarson, Jörgen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Wingqvist, Claes
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    An in-circuit, non-contacting, measurement method for S-parameters and power in planar circuits2001In: IEEE transactions on microwave theory and techniques, Vol. 49, no 12, p. 2567-2572Article in journal (Refereed)
    Abstract [en]

    A method for measuring the reflection coefficient and absolute power in the propagating waves from a circuit embedded in a planar circuit environment is presented. The method utilizes a pair of inductive and capacitive probes. The standard one-port vector-network-analyzer calibration is extended to allow the measurement of power in the forward and backward waves. Experimental results are presented for measurements between 700 MHz and 20 GHz. Good agreement between the new noncontacting method and a standard coaxial measurement method is demonstrated up to 12 GHz for power and up to 14 GHz for the reflection coefficient. The method is useful for in-circuit testing of open transmission-line structures, e.g., microstrip.

  • 90.
    Stenarson, Jörgen
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Wingqvist, Claes
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    An in-circuit, non-contacting, S-para-meter measurement method,2001In: Proceedings of 57th ARFTG Conference, 2001., 2001Conference paper (Refereed)
    Abstract [en]

    A method for measuring S-parameters of a circuit embedded in a planar circuit environment is presented. The method utilizes an inductive and a capacitive probe. Experimental results are presented for probe measurements of reflection coefficient from 0.7 to 20 GHz with good agreement to verifying measurements up to 14 GHz. The method shows great promise for in-circuit Sparameter testing that has previously required physical modification or even complete disassembly to test sub-circuits in a microstrip environment.

  • 91.
    Sundling, Catherine
    et al.
    Stockholm University, Sweden.
    Berglund, Birgitta
    Karolinska Institute, Sweden; Stockholm University, Sweden.
    Nilsson, Mats
    Stockholm University, Sweden.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Pendrill, Leslie
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Overall accessibility to traveling by rail for the elderly with and without functional limitations: the whole-trip perspective2014In: International Journal of Environmental Research and Public Health, ISSN 1661-7827, Vol. 11, no 12, p. 12938-12968Article in journal (Refereed)
    Abstract [en]

    Elderly persons’ perceived accessibility to railway traveling depends on their functional limitations/diseases, their functional abilities and their travel behaviors in interaction with the barriers encountered during whole trips. A survey was conducted on a random sample of 1000 city residents (65–85 years old; 57% response rate). The travels were perceived least accessible by respondents with severely reduced functional ability and by those with more than one functional limitation/disease (e.g., restricted mobility and chronic pain). Those who traveled “often”, perceived the accessibility to be better than those who traveled less frequently. For travelers with high functional ability, the main barriers to more frequent traveling were travel costs and low punctuality. For those with low functional ability, one’s own health was reported to be the main barrier. Our results clarify the links among existing functional limitations/functional abilities, the barriers encountered, the travel behavior, and the overall accessibility to traveling. By operationalizing the whole-trip concept as a chain of events, we deliver practical knowledge on vulnerable groups for decision-making to improve the transport environment for all.

  • 92.
    Sundling, Catherine
    et al.
    Stockholm University, Sweden.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Pendrill, Leslie
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Nilsson, Mats E.
    Stockholm University, Sweden; Karolinska Institute, Sweden.
    Berglund, Birgitta
    Stockholm University, Sweden; Karolinska Institute, Sweden.
    Two models of accessibility to railway traveling for vulnerable, elderly persons2015In: Measurement, ISSN 0263-2241, E-ISSN 1873-412X, Vol. 72, p. 96-101Article in journal (Refereed)
    Abstract [en]

    Public transport mobility is restricted for the vulnerable travelers, e.g., those with functional limitations. By removing barriers, a more flexible and independent travel behavior is accomplished. For whole-trip traveling, we model accessibility as a three-way reciprocal relationship among travelers’ functional ability, barriers met and resulting travel behaviors. For every journey and destination, an accessibility measure is constructed from all barriers’ weights and the probabilities of encountering each of them in traveling to specific destinations. The accessibility to whole-trip traveling is then modeled by travelers’ individual weightings of sets of barriers and the probabilities of encountering them. By using specific reference values, as in master scaling, we estimate the measurement error for each participant’s perceived effort to overcome a certain barrier, and thus obtain a calibrated measure of accessibility. We conclude that customized abatement procedures must accomplish better accessibility for all, especially for the vulnerable travelers.

  • 93.
    Sundling, Catherine
    et al.
    Stockholm University, Sweden.
    Nilsson, Mats E.
    Stockholm University, Sweden.
    Hellqvist, Sara
    Stockholm University, Sweden.
    Pendrill, Leslie
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik.
    Emardson, Ragne
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Berglund, Birgitta
    Stockholm University, Sweden; Karolinska Institute, Sweden.
    Travel behaviour change in old age: the role of critical incidents in public transport2015In: European Journal of Ageing, ISSN 1613-9372, E-ISSN 1613-9380, Vol. 13, no 1, p. 75-83Article in journal (Refereed)
    Abstract [en]

    Older people’s travel behaviour is affected by negative or positive critical incidents in the public transport environment. With the objective of identifying such incidents during whole trips and examining how travel behaviour had changed, we have conducted in-depth interviews with 30 participants aged 65–91 years in the County of Stockholm, Sweden. Out of 469 incidents identified, 77 were reported to have resulted in travel behaviour change, 67 of them in a negative way. Most critical incidents were encountered in the physical environment on-board vehicles and at stations/stops as well as in pricing/ticketing. The findings show that more personal assistance, better driving behaviour, and swift maintenance of elevators and escalators are key facilitators that would improve predictability in travelling and enhance vulnerable older travellers’ feeling of security. The results demonstrate the benefit of involving different groups of end users in future planning and design, such that transport systems would meet the various needs of its end users.

  • 94.
    Tang, Aik Yean
    et al.
    Chalmers University of Technology, Sweden.
    Drakinskiy, Vladimir
    Chalmers University of Technology, Sweden.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation. Chalmers University of Technology, Sweden.
    Stenarson, Jörgen
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation. Chalmers University of Technology, Sweden.
    Bryllert, Tomas
    Chalmers University of Technology, Sweden.
    Stake, Jan
    Chalmers University of Technology, Sweden.
    Analytical Extraction of a Schottky Diode Model from Broadband S-parameters2013In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 61, no 5, p. 1870-1878Article in journal (Refereed)
    Abstract [en]

    We present an analytic method to extract Schottky diode parasitic model parameters. All the ten unknown model parameters are extracted via a straightforward step-by-step procedure. The challenges for a proper finger inductance and series resistance extraction are discussed and solutions are recommended. The proposed method is evaluated using three sets of S-parameter data for GaAs-based planar Schottky diodes, i.e., data from measurement up to 110 GHz and 3-D electromagnetic full-wave simulations up to 600 GHz. The extracted models agree well with the measured and simulated data.

  • 95.
    Tortora, Paolo
    et al.
    University of Bologna, Italy.
    Crewell, Susanne
    University of Cologne, Germany.
    Elgered, Gunnar
    Chalmers University of Technology, Sweden.
    Graziani, Alberto
    University of Bologna, Italy.
    Jarlemark, Per
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Löhnert, Ulrich
    University of Cologne, Germany.
    Martellucci, Antonio
    European Space Agency, The Netherlands.
    Mercolino, Mattia
    European Space Agency, Germany.
    Rose, Thomas
    Radiometer Physics GmbH, Germany.
    Schween, Jan Herbert
    University of Cologne, Germany.
    AWARDS: Advanced microwave radiometers for deep space stations2013In: Space communications, ISSN 0924-8625, E-ISSN 1875-9211, Vol. 22, no 2-4, p. 159-170Article in journal (Refereed)
    Abstract [en]

    The objective of this study, named AWARDS (Advanced microWAve Radiometers in Deep space Stations), is the preliminary design of a transmission Media Calibration System (MCS) to be located at an ESA Deep Space Antenna (DSA) site. The crucial aspect is the capability to accurately retrieve the tropospheric path delay along the line-of-sight of the deep space probe in order to allow precise tropospheric calibration of deep space observables (range and range-rate) with particular reference to the BepiColombo spacecraft and its primary DSA at Cebreros (ES). The study focuses on two main aspects which lead to the preliminary design of the Mercury Orbiter Radioscience Experiment (MORE) MCS: the characterization of current microwave radiometers (MWRs) available at ESA/ESTEC and the atmospheric fluctuation effects on the MCS error budget, in terms of the Allan standard deviation (ASD). In the course of the study, further critical aspects have been identified (effects of Sun contamination, effects of ground noise emission), and mitigation strategies have been proposed. The final outcome is a preliminary design of the MWR (and the entire MCS) to be deployed at the ESA/ESTRACK (ESA Tracking station network) sites and being compliant with MORE requirements.

  • 96.
    Werner, Gösta
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Beständighet hos varselkläders fluorescerande material2000Report (Refereed)
    Download full text (pdf)
    FULLTEXT01
  • 97.
    Werner, Gösta
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Undersökning av reflexvävars synbarhet i olika vädersituationer.1998Report (Refereed)
    Download full text (pdf)
    FULLTEXT01
  • 98.
    Werner, Gösta
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Isaksson, Hans
    Nötningshärdighet hos ögonskydd2000Report (Refereed)
    Download full text (pdf)
    fulltext
  • 99.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    A subharmonic graphene FET mixer2012In: IEEE Electron Device Letters, ISSN 0741-3106, E-ISSN 1558-0563, Vol. 33, no 1, p. 71-73Article in journal (Refereed)
  • 100.
    Yhland, Klas
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Kommunikation.
    Simplified Analysis of Resistive Mixers2007In: IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, Vol. 17, no 8, p. 604-6Article in journal (Refereed)
    Abstract [en]

    This letter gives a simple method for calculation by hand of the conversion efficiency of resistive mixers. The method assumes the same embedding impedances at all mixing frequencies and the mixing element is modeled as a time varying reflection coefficient. This gives simple expressions for the conversion efficiency. It, therefore, allows analytical parameter studies of the impact of the embedding impedance and parameters of the mixing element on the conversion efficiency. The theory is developed in two stages. First at optimum local oscillator power and second for arbitrary power. The theory agrees well with verifying measurements made on a field-effect transistor (FET)-based resistive mixer.

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