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Narrow band MMIC active filter using negative resistance circuits in coplanar line technique
.Narrow band MMIC active filter using negative resistance circuits in coplanar line technique B Hopi and I Wolff Abstract A narrow band second order active bandpass filter has been developed in coplanar line technique using negative resistance circuits. This filter has a tunable centre frequency from 1.92 GHz to 2 GHz, a 3 dB bandwidth of 24 MHz, which is about 1.2% of the centre frequency. It is
A K-Band monolithic HEMT medium power amplifier
A K.Band monolithic power amplifier H .J .Slwer18, T Grave, L. Schleicher, H Rlechert, .J.E lIalier and W Kellner HEMT medium Abstract Design, fabrication technology, and measured performanceof a monolithicmedium power amplifier are described. The circuit consists of four amplifier stages and operates over the 17 -26 GHz frequency range. The impact of bond wires for hybrid mounting was taken in
A 1 KWatt C band solid power amplifier
A1 KWall C band .olld power amplifier De.lnn. R6g", Glbon Eric and Malnl Mlche. Abstract A C band high power solid state amplifier has been developed. The output power is greater than 800 Watts in a bandwidth of 600 MHzand is as high as 1 KWattin the center of the bandwidth. The amplifier can operate under multimode conditions from the CW to very short pulses. Afast synchronous switching of the
Compact and wideband MMIC frequency converters
Compact and wideband frequency converters MMIC Tetsuo Hirota and Hiroshi Okazaki NIT Wireless Systems Laboratories 1-2356 Take, Yokosuka 238-03, Japan. Abstract A V-band MMIC up-converter and a down-converter were designed and tested. The up-converter has novel balanced configuration using uniplanar structure. The down-converter includes RF and LO amplifiers and were integrated into a compact s
A new effective. numerically-analytical method for analysis of electromagnetic wave diffraction by inhomogeneous dielectric bodies
A new effective. numerically-analytical method for analysis of electromagnetic wave diffraction by inhomogeneous dielectric bodies Alexander Lerer, Sergey Bryzgalo Abstract A new effective numerically-analytical method for treating problem of diffraction by two- and three dimensional inhomogeneous dielectric bodies is presented. The method is based on an inversion of the main singular part of oper
Iterative physical optics algorithms for computing the EM scattering of open ended cavities
Iterative physical optics algorithms for computing the EM scattering of open ended cavities F Obelielro*,.J.L Rodrlguez*, R .JBurkholder**and A G Pino* Abstract The analysis of high-frequency scattering from electrically large open cavities is addressed in this work. A formulation based on the high frequency (HF) asymptotic principles of physical optics (PO) is developed for analyzing the scatte
Mode extinction effect on printed transmission lines when the thickness of lossy conductors is decreased
Mode extinction effect on printed transmission lines when the thickness of lossy conductors is decreased Mlkio TsuJI, Ken)1 Yoshimura Hiroshi Shlgesawa and Department of Electronics, Doshisha University, Tanabe, Kyoto, 61003 Japan Abstract Printed transmission lines have been extensively examined so far, but results obtained there are all concerned with the waveguiding conductors with no loss and
Solutions of EM problems using finite element & complex frequency hopping techniques
Solutions of EM problems using finite element & complex frequency hopping techniques M A KOlbehdarl, M S Nakhla, and Q J Zhang Department of Electronics, Carleton University, Ottawa Canada KIS 586 Abstract The focus of this paper is to introduce the basic concepts and features of a new efficient technique for solution of time or frequency domain electromagnetic field problems. The method is based
Computational and experimental characterization of superconductor dielectric microwave resonators
Computational and experimental characterization of superconductordielectric microwave resonators Farhat Abbas, L E Davis* and J C Gallop** Abstract Superconductor-Dielectric Microwave Resonators have been characterized by computing their resonant frequencies, mode charts and unloaded Q-values by using the Bose statistics and the Gorter and Casimir model for a two-fluid model. The five higher orde
Multiple oscillator waveguide power combining
Multiple oscillator waveguide power combining Andrew R Adams, Roger D Pollard and Christopher M Snowden Abstract A novel multiple oscillator power combiner incorporating a planar antenna array loaded with active devices and mounted transversely in rectangular waveguide is described. This new approach offers significant advantages over those cavity-based combiners previously presented particul