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Waveguide bandpass filters with attenuation of higher-order passbands
Waveguide bandpass filters with attenuation higher-order passbands Wolfgang Menzel., Jan Machac" of * Microwave Techniques, University of Ulm, D-89069 Ulm, Germany * * Faculty of Electrical Engineering, Czech Technical University, Technicka 2, 16627 Prague 6, Czech Republic Abstract A new method is proposed to provide additional attenuation to higher-order passbands of metal waveguide bandpass f
A non-magnetic low-loss wideband quadrature hybrid for front-end applications in magnetic resonance systems
A non-magnetic low-loss wideband quadrature hybrid for front-end applications in magnetic resonance systems R. Oppelt Siemens AG, Corporate Research and Development, Dept. ZFE BT PE42 P.O Box 3220, 91050 Erlangen, Germany Tel +499131731922 Fax. +499131-721339 e-mail WSE RLSOO 2 2@atorerls.zfe.siemens.d Abstract The quadrature hybrid described below was developed for circular polarizing antennas i
The nature of dielectric thermostability of barium lantanoid tetratitanates
The nature of dielectric thermostability lantanoid tetratitanates Yu M Poplavko, M E IIchenko and V I Butko. of barium * Kiev Polytechnic Institute, 252056 Kiev, Ukraine TEL.. +7044 411 3905; FAX: +70442745932 Abstract The problem of combining in barium lantanoid tetratitanates (BLT) polycrystalline compositions a high dielectric permittivity with its temperature independence and low microwave
Phenomenological description of "coherence peak" of high-Tc superconductors by improved three-fluid model
Phenomenological description of "coherence peak" of high- Tc superconductors by improved three-fluid model Yoshio Kobayashi, Tadashi Imai, and Takaaki Sakakibara Deportment of Electrical and Electronic Engineering, Saitama University, hima-Okubo S 255, Urawa, Saitama338, Japan Abstract So-called "coherence peak" of real part of complex conductivity for low-Tcsuperconductors, which is expected by
Frequency dependence of large signal velocity-field relation in GaAs by Monte-Carlo simulation
Frequency dependence of large signal velocity-field relation in GaAs by Monte-Carlo simulation Werner Schroeder and Ingo WolH Dept. of Electrical Engineering and Sonderforschungsbereich 254, Duisburg University, Bismorckstr.81, 0-47048 Duisburg. Tel +49 203 379 3266; Fax: +49 203 379 3499; E-mail: werner@ate8.uni-duisburg.de Abstract Non steady-state electron transport in GaAs is investigated by
2GHz gallium arsenide bulk acoustic wave resonators fabricated using sol-gel technology
2GHz gallium arsenide bulk acoustic wave resonators fabricated using sol-gel technology Z Awang and R E Miles Microwave and Terahertz Technology Group, Department of Electronic and Electrical Engineering, The University of Leeds, Leeds LS2 9JT, United Kingdom. Tel.: 0532332094; e-mail: een5za@ukac.leeds.sun Abstract This paper reports on the deposition of ferroelectric lead titanate thin films on
Micromachined circuits for Mm-wave applications
Micromachined circuits for Mm-wave Rhonda F. Drayton and Linda P.B. Katehi, The University of Michigan, Ann Arbor, MI 48109 applications USA Abstract A novel transmission line which utilizes micromachining techniques in the development of circuits for millimeter-wave applications is presented. Micromachined circuits incorporate the fabrication of an upper-half shielding environment with the cir
A new double slotline ring resonator with coplanar waveguide feeder
A new double slotline ring resonator with coplanar waveguide feeder M.L. Cousseran, M. Freulon, K. Hettak, A. Peden J.Ph. Coupez . * LEST - URA CNRS nO1329 - ENST Br - BP832 29285 Brest Cedex - FRANCEFax number: (33) 98 00 1343 Abstract This paper proposes a new slotline resonator configuration with coplanar coupling. First of all, the design, the simulated and experimental results are presente
Theory and application of circumferentially magnetized ferrites in tunable devices
Theory and application of circumferentially magnetized ferrites in tunable devices Jozef ModelskiA, Jerzy Krupka-, Adam Abramowicz. Warsaw University of Technology, I\lnstitute of Radiolectronics, *Institute of Microelectronics and Optoelectronics, -Institute of Electronics Fundamentals, Nowowiejska 15/19, 00-665 Warsaw, Poland, tel/fox: +4822-256555, e-mail: AABR@ipe.pw.edu.pl Abstract The theor
Application of bilateral slotlines to broadband microwave components
Application of bilateral slotlines to broadband . microwave components J. Chramiec., H. Aubert" and H. Baudrand" *Technicol University of Gdonsk, Gdonsk, Poland Narutowiczo 11/12,80-952 **ENSEEIHT,2, rue Charles Comichel, 31071 Toulouse CEDEX, France Abstract Novel design of doubly-balanced mixers/modulators and even order frequency multipliers employing broadband microstripbalanced stripline-bi