Knowledge Centre
Find a document written by the best international scientists in our secure database.
24776 documents found.
A 19 GHz HIGH POWER LOW LOSS LATCHING SWITCH FOR SPACE APPLICATIONS
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
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-TUNNED VERY WIDE-BAND Y-CIRCULATOR
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 CAVITIES WITH PARTIAL-HEIGHT FERRITE INSERT
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
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 OF THE FIBER MODES USING EQUIVALENT CIRCUITS IN FOURIER SPACE"
"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
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-BAND RECEIVER FRONT-END
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
ESTIMATED OUTAGE AND COMPATIBILITY OF DIGITAL (FSK) AND ANALOG (FM) TRANSMISSION IN MICROWAVE RADIO-RELAY SYSTEMS
SATELLITE COMMUNICATION AND PROPAGATION EXPERIMENTS IN ANTARCTIC REGIONS
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