Knowledge Centre
Find a document written by the best international scientists in our secure database.
24776 documents found.
Phase Stability Tests with a Millimeter Wave Network Analyzer
PHASE STABILITY TESTS WITH A MILLIMETER WAVE NETWORK ANALYZER Pekka Eskelinen, Jussi Säily Helsinki University of Technology, Radio Laboratory, IDC Majborginmaki 26, 07700 Koskenkyla, FINLAND email : ari.eskelinen@pp.inet.fi ABSTRACT Short-term phase uncertainties in certain commercial millimeter wave vector network analyzers seem to be partly related to errors in their internal reference oscilla
A Highly Linear Digital Detector for Noise Parameter Measurements at Microwave Frequencies
A HIGHLY LINEAR DIGITAL DETECTOR FOR NOISE PARAMETER MEASUREMENTS AT MICROWAVE FREQUENCIES Ilona Rolfes, Thomas Musch and Burkhard Schiek Ruhr-University Bochum, RF & Microwave Engineering Institute Universitaetsstr. 150, 44801 Bochum, Germany Tel.: +49 234 32-26497, Fax: +49 234 32-14167, e-mail: Ilona@HF.Ruhr-Uni-Bochum.de ABSTRACT Improvements in the determination of the 4 real parameters F m
A Fast Heterodyne Network Analyzer Based on Precision Linear Frequency Ramps
A FAST HETERODYNE NETWORK ANALYZER BASED ON PRECISION LINEAR FREQUENCY RAMPS T. Musch, B. Schulte, B. Schiek Ruhr-University Bochum, RF & Microwave Engineering Institute Universitaetsstrasse 150, D-44780 Bochum, Germany Telephone: +49 234 32 - 26496, Fax: +49 234 32 - 14167, E-mail: tom@hf.ruhr-uni-bochum.de ABSTRACT A system concept for a heterodyne network analyzer (NWA) is presented. In contra
Homodyne Phase Sensitive Sub-Millimetre Wave Transmission Measurements
HOMODYNE PHASE SENSITIVE SUB-MILLIMETRE WAVE TRANSMISSION MEASUREMENTS G. Rehm, J. Depser, L.-P. Schmidt Lehrstuhl f¨ r Hochfrequenztechnik, Universit¨ t Erlangen-N¨ rnberg u a u Cauerstr. 9, D-91058 Erlangen, Germany Phone: +49 9131 8527226, Fax: +49 9131 8527212 guenther@lhft.e-technik.uni-erlangen.de ABSTRACT A novel measurement setup for transmission measurements using a homodyne receiver is
Improving the Dynamic Range of Spectrum Measurements by Compensating for the Effects of Phase Noise and Thermal Noise
Improving the Dynamic Range of Spectrum Measurements by Compensating for the Effects of Phase Noise and Thermal Noise Benjamin R. Zarlingo, Wing J. Mar Agilent Technologies, Inc., Everett, Washington, USA, ben_zarlingo@agilent.com Agilent Technologies, Inc., Santa Rosa, California, USA, wing_mar@agilent.com ABSTRACT The signal/noise portion of the dynamic range of many spectrum measurements can be
W-Band On-Wafer Noise Parameter Measurements
W-BAND ON-WAFER NOISE PARAMETER MEASUREMENTS Tauno Vähä-Heikkilä1, Manu Lahdes1, Jussi Tuovinen1, Mikko Kantanen1, Pekka Kangaslahti2,3, Petri Jukkala2 and Nicholas Hughes2 MilliLab, VTT Information Technology, P.O. Box 1202, FIN-02044 VTT, Finland, email: Tauno.Vaha-Heikkila@vtt.fi, http://www.vtt.fi/MilliLab, 2 Ylinen Electronics Ltd., Teollisuustie 9 A, FIN-02700 Kauniainen, 3 Electronic Circui
Accurate Design of Ka-band Flat Scanning Antennas for Mobile Satellite Terminals
Accurate design of Ka-band flat scanning antennas for mobile satellite terminals Roberto Vincenti Gatti, Roberto Sorrentino, Paolo Mezzanotte, Luca Roselli and Federico Alimenti University of Perugia, Dept. Electronic and Information Engineering, 06125 Perugia, Italy Tel. +39 075 585 3601 Fax +39 075 585 3606 e-mail sorrent@unipg.it Abstract- Because of its good efficiency and relatively low cost
Dielectric Wide Angle Lens for Millimeter-Wave Focal Plane Focusing
Dielectric Wide Angle Lenses for Millimeter-Wave Focal Plane Imaging J. Richter, A. Hofmann, L.-P. Schmidt Lehrstuhl f¨ r Hochfrequenztechnik, Universit¨ t Erlangen-N¨ rnberg u a u Cauerstr. 9, D-91058 Erlangen, Germany Phone: +49 9131 8527220, Fax: +49 9131 8527212, E-Mail: juergen.richter@lhft.de Abstract Various design procedures for millimeter-wave dielectric lenses have been studied and com
FDTD Analysis of Microwave Active Antennas with Optical Excitation
FDTD ANALYSIS OF MICROWAVE ACTIVE ANTENNAS WITH OPTICAL EXCITATION Y.Zhang , P.Gardner, H. Ghafouri-Shiraz and P.S.Hall The University of Birmingham, Edgbaston Birmingham, B15 2TT Abstract In this paper, a circuit model of PIN avalanche photodiodes is successfully incorporated into the FDTD analysis of optoelectronic active antennas. As an example, an active patch antenna array with two patches, o
A Parallel-Plate Luneburg Lens Sensor Concept for Automatic Cruise Control Applications
A Parallel-Plate Luneburg Lens Sensor Concept for Automatic Cruise Control Applications Marwan Younis, Alexander Herschlein, Young Jin Park and Werner Wiesbeck Institut f¨ r H¨ chstfrequenztechnik und Elektronik, u o Universit¨ t Karlsruhe, Kaiserstr. 12, 76128 Karlsruhe, Germany a Tel. +49-(0)721-608 6267 E-Mail: m.younis@ieee.org ABSTRACT A new system concept for Automatic Cruise Control (ACC)