PUMP NOISE COUPLING IN PARAMETRIC AMPLIFIERS M Dean and J Clarke * ABSTRACT A simple theory for predicting the effects of pump noise on the performance of parametric amplifiers has been developed and verified. It is shown that AM noise on the pump injects both FM and AM noise on the signal magnified by approximately the amplifier gain. It is also shown that FM noise on the pump can yield bo

POWER SATURATION MECHANISMS IN IMPATTS P.A. BLAKEY * Abstract A computer simulation investigate Computed gallium arsenide X-band structures: the degree of agreement obtained is taken as support for the diode model. The relative importance of various contributory saturation mechanisms are then isolated and discussed of the operation of IMPATT diodes has been used to the factors which limit th

PARASITIC OSCILLATIONS IN IMPATT-DIODE OSCILLATORS J.J.Goedbloed and H.Tjassens ABSTRACT. Atheory is presented for the investigation of parasitic oscillations in IMPATT-diode oscillators. The theoretically predicted behaviour is found to be in good agreement with experimental results. Examples are given of how the onset of parasitic oscillations can be avoided or can be shifted towards highe



PHASE TRANSIENTS OF INJECTION LOCKED GUNN OSCILLATORS FOR MICROWAVE PULSE COMMUNICATIONe PAVLIDIS, Dc, HARTNAGEL, He and TOMIZAWA, Ko ABSTRACT Using specially selected phase-locking systems, the phase transients of Gunn oscillators have been studied with the help of Lissajous figures on a fast sampling oscilloscope. The results show that phase transients can exhibit a complex oscillatory behaviou

DYNAMIC BEHAVIOUR OF STABLE AND INJECTION-LOCKED IMPATT DIODE AMPLIFIERS FOR PSK MICROWAVE COMMUNICATION SYSTEMS R.Blix and H.J.Thaler ABSTRACT: The transient behaviour of stable and injection-locked IMPATT diode microwave amplifiers driven by phase shift keyed signals is investigated. Experimental results obtained with the aid of a fast real time microwave correlator system and bit error rate me

NONLINEAR NOISE EFFECTS IN SYNCRONIZED OSCILLATORS by Klaus SchUnemann ABSTRACT: A nonlinear theory of noise in synchronized oscillators is outlined, thus extending Kurokawa's work /1/ from small to arbitrary injection levels. As a first application the output noise of synchronized oscillators is calculated for moderate injection signals. It is shown both theoretically and experimentally that th

MICROWAVE CAD IMPACT IN THE 70'S HARLAN HOWE, JR. ABSTRACT While the microwave community was not the first to discover the benefits of computeraided design, it has in the last ten years, made extensive use of this extremely powerful tool. The use of computeraided design for microwave components and subsystems spans the range from simple problems which merely require high- speed capability t

DIELECTRIC WAVEGUIDES AND WAVEGUIDE DEVICES FOR MICROWAVE APPLICATIONS V.F. Vzyatyshev. B.I. Ryabov. G.D. Rozhkov. A.N. Merkuryev* ABSTRACT A survey on the state of the art in Dielectric Waveguide (DW), stressing in particular the practical microwave applications, is given. The principles for designing DWs, fixing and joining devices, launchers, various multiport networks etc. are fo

OPTIMIZED CAVITY-BACKED SLOT ANTENNAS FOR PHASED ARRAYS Rolf O. E. Lagerlof ABSTRACT The resonance frequency of a cavity-backed slot antenna and also the Qfactor are highly dependent of the dimensions of the cavity and of the dielectric filling of the cavity. A low Q-factor is desired for wideband frequency performance. Recently, the author published the values of the dimensions of the cavity