A 19 GHz HIGH POWER LOW LOSS LATCHING SWITCH FOR SPACE APPLICATIONS M.J. Mlinar~ W.S. Piotrowski and J.E. Raue ABSTRACT AND INTRODUCTION This development effort was undertaken to provide a rugged high performance satellite switch for the downlink transmitter of the next generation 20/30 GHz satellite systems. Emphasis was on high power handling capability, low loss and good bandwidth. No s

CIRCULATORS WITH EVANESCENT-MODE RESONATORS Christian Schieblich, Klaus SchUnemann technique for the limits outlined. performance in pass-band or mo- ABSTRACT: The potentials of the waveguide-bel ow-cutoff realization of circulators are discussed and performance Two realizations are presented showing either narrow-band conjunction with extremely high attenuation outside the derate bandwidths of 1

A STAGGER-TUNED VERY WIDE-BAND Y-CIRCULATOR A.-M. Khilla and I. Wolff * A method for designing wide-band H-plane waveguide Y-junction circulators is given. It has resulted in a magnetically stable circulator with exceptional performance. An insertion loss of 0.15-dB, more than 25-dB average isolation and 30-dB average reflection loss have been achieved from 8.9 to 12.1 GHz in X-band. 

ANALYSIS OF CIRCULAR WAVEGUIDE INSERT CAVITIES WITH PARTIAL-HEIGHT Wolfgang Hauth FERRITE ABSTRACT The rigorous analysis of a circular waveguide cavity with partial-height ferrite insert is an efficient means on the way to a complete computer-aided design of the corresponding waveguide circulator. The paper summarizes the basic parts of this analysis. dimensions for maximum Results are use

THEORY AND DESIGN OF NON-CONTACTING MILLIMETER WAVEGUIDE BACKSHORTS Antti v. Raisanen*, Michael K. Brewer+ ABSTRACT New designs of non-contacting millimeter waveguide backshorts have been developed to avoid both the wear characteristic of contacting shorts and excessive loss due to the second harmonic passband of non-contacting A/4-shorts. The new backshorts have been experimentally tested

"EVALUATION FOURIER OF THE FIBER MODES USING EQUIVALENT CIRCUITS IN SPACE" J.D. Kanellopoulos and J.G. Fikioris C.D. Papageorgiou, ABSTRACT In the present paper, a new powerful method of studying cylindrical guiding structures, is proposed. Starting fram Maxwell equations, equivalent circuits in wavenumber space are constructed. The propagating modes are derived from the resonance conditio

A 4 CHANNEL AMPLITUDE COMPARISON MILLIMETRE-WAVE RADIOMETER S.J. Nightingale* ABSTRACT At present, there is considerable interest in exploring the possibility of using millimetre-wave radiometry for passive short range guidance systems. This paper describes a 4 channel amplitude comparison receiver which has been developed within certain specified constraints. 

AN INTEGRATED KA-BANV RECEIVER FRONT-END Wolfgang Menzel, Felix Sicking ABSTRACT: Heinrich Callsen, Bernd Adelseck und The design and performance of a fin-line integrated receiver front-end for Ka-band (26-40 GHz) frequencies is described. The modu+e consists of a balanced mixer including an IF filter, a gunn oscillator and a PIN-switch which can be used as STC for radar application or a



SATPLLITE ANTARCTIC Daniel COMMUNICATION REGIONS AND PROPAGATION EXPERIMENTS IN Salzer* ABSTRACT During the year 1980, an experiment was performed to analyse propagation effects on L-band satellite communications in the antarctic regions. A receiving station was installed at the Argentinian Antarctic Station Belgrano II, with the support of the Argentinian Space Agency (CNIE) and the Argenti