J. Varis

Tieto (Finland) — Finland

Physics and Astronomy · Physical Sciences

35h-index7.8kcitations86works0.02yr avg
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Research Topics

Galaxies: Formation, Evolution, Phenomena(17), Cosmology and Gravitation Theories(17), Astrophysics and Cosmic Phenomena(15), Radio Astronomy Observations and Technology(15), Astrophysics and Star Formation Studies(14)

Publications46 total

Self-actuation tests of ohmic contact and capacitive RFMEMS switches for wideband RF power limiter circuits
2012· 9 cited
Measured performance of a high-resolution passive video-rate submillimeter-wave imaging system demonstrator for stand-off imaging
2012· 16 cited
Reconfigurable wideband LNAs using ohmic contact and capacitive RF-MEMS switching circuits
2011· 5 cited
A K-Band RF-MEMS-Enabled Reconfigurable and Multifunctional Low-Noise Amplifier Hybrid Circuit
Active and Passive Electronic Components·2011· 7 citedOpen Access
Ka-band RF MEMS phase shifters for energy starved millimetre-wave radar sensors
2010· 11 cited
Design, packaging and reliability aspects of RF MEMS circuits fabricated using a GaAs MMIC foundry process technology
2010· 22 citedOpen Access
<i>Planck</i>pre-launch status: Low Frequency Instrument calibration and expected scientific performance
Astronomy and Astrophysics·2010· 40 citedOpen Access
RF MEMS and MMIC based reconfigurable matching networks for adaptive multi-band RF front-ends
2010· 26 citedOpen Access
RF MEMS matching networks for frequency tunable SiGe LNA
2010
The linearity response of the Planck-LFI flight model receivers
Journal of Instrumentation·2009· 19 citedOpen Access
Advanced modelling of the Planck-LFI radiometers
Journal of Instrumentation·2009· 4 citedOpen Access
Thermal susceptibility of the Planck-LFI receivers
Journal of Instrumentation·2009· 9 citedOpen Access
Design, development, and verification of the Planck Low Frequency Instrument 70 GHz Front-End and Back-End Modules
Journal of Instrumentation·2009· 18 citedOpen Access
RF MEMS based impedance matching networks for tunable multi-band microwave low noise amplifiers
2009· 14 cited
The Planck-LFI Programme
2009· 1 cited
A 20 GHz antenna integrated RF MEMS based router and switching networks made on quartz
2009
Switched Beam Antenna Based on RF MEMS SPDT Switch on Quartz Substrate
IEEE Antennas and Wireless Propagation Letters·2009· 46 cited
Results of the Planck 70 GHz Receiver Protoflight Model Test Campaign
2007Open Access
Planck-LFI: Instrument Design and Ground Calibration Strategy
Biblioteca Digital da Memória Científica do INPE (National Institute for Space Research)·2005· 2 citedOpen Access
W-Band RF MEMS Double and Triple-Stub Impedance Tuners
IEEE MTT-S International Microwave Symposium Digest, 2005.·2005· 31 cited
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Frequent Co-authors

J. Tuovinen(17), T. Vähä-Heikkilä(15), Jukka Rantala(12), Pekka Rantakari(10), R. Malmqvist(10), P. Jukkala(10), J. Hartikainen(10), R. Lehtiniemi(10), C. Samuelsson(9), M. Bersanelli(9), A. Mennella(8), P. R. Meinhold(8), N. Hughes(8), M. Laaninen(8), Anders Rydberg(7), R. C. Butler(7), R. Leonardi(7), L. Terenzi(7), L. Valenziano(7), F. Villa(7)