MILLIMETREWAVE ANTENNAS A.D. Olver ABSTRACT Antennas designed for use at millimetrewaves and sub-millimetrewaves are reviewed. The use of these parts of the spectrum for communications, radar and remote sensing is growing rapidly and with it the demand for high performance antennas. Many novel designs have been developed to exploit the unique characteristics of millimetrewaves. The short wavelengt

THEORETICAL MILLIMETER-W AND EXPERIMENTAL A VE INP GUNN-EFFECT INVESTIGATION OSCILLATOR OF A.E.Ekzhanov, A.S.Kosov, V.A.Zotov* ABSTRACT A large-signal computer simulation of an InP millimeter-wave Gunn-effect oscillator has been developed. The results of simulation show that increasing active region doping level leads to substantial growth of efficiency. The maximal simulated efficiency for

A wide band filter IFM D. AUFFRAY/JL. ABSTRACT LACOMBE The design and performance of a four ways are presented in this paper. Through the use of an hybrid microstrip hybrid filter discriminator IFM technology and MMIC t components the RF assembly uni t is of small size and weight allows and low cost. These radar characteristics an the low power warning receivers. consu

MESFET SHUNT OSCILLATOR DESIGN WITH DIELECTRIC RESONATOR AS A FEEDBACK ELEMENT L. Urshev*, S. Haimov*, S. Georgiev* ABSTRACT MESFET oscillators with dielectric resonators in the shunt feedback exhibit excellent performance, but their design is usually based on empirical methods or on computer optimization. In this paper a systematic approach, which allows direct determination of all circuit embedd

10GHz BAND COMPACT PHASE LOCKED OSCILLATOR WITH LOW PHASE NOISE Tomozo OHTA, Masao MIYAZAKI, Kaoru OKABE and Atsushi ASHIDA+ 1)ABSTRACT The small-sized and light-weighted 10GHz band Phase Locked Oscillator(PLO) with superior characteristics, cost effectiveness and high productivity have been newly developed for satellite communication systems such as VSAT. The PLO is composed of three

VERY HIGH PERFORMANCE D.C. COUPLED MMIC FET AMPLIFIERS A. Mauri, E.M. Bastida, P. A Chiappa, M. Feudale ABSTRACT A new design approach for broadband d.c. coupled MMIC FET amplifier stages allowing substantial improvements as gain, bandwidth, noise, input matching and stability over the state of the art solutions is described. Design and performances of two MMIC ampl Hiers accordingly devel

DESIGN AND PERFORMANCE OF CRYOGENICALLY -COOLABLE ULTRA LOW NOISE, L-BAND AMPLIFIER. J. D. Gallego*, M. W. Pospieszalski** ABSTRACT The design, realization and measurement of an ultra low-noise, cryogenically-coolable, L-band amplifier for radio astronomy applications are described. The amplifier exhibits 3 K (0.045 dB N.F.) average noise temperature over 600 MHz. bandwith with 36 dB of ga

DESIGN OF LOW PHASE NOISE UHF-OSCILLATOR WITH ADVANCED SAW-RESONATOR-TECHNOLOGY K. Borst, ABSTRACT The design of a fixed frequency UHF oscillator stabilized by a surface acoustic wave (SAW-) resonator at 720 MHz is described. The resulting circuit yields excellent phase noise characteristics taking advantage of a new SAW-resonator structure as B. Fleischmann, K. Wacker* well as of computer op

Horna 1 DIELECTRIC RESONATOR J Horna c;, OSCILLATOR: DESIGNING FOR TEMPERATtrnE STABILITY ------------------------------------------------- ABSTRACT To achieve good temperature stability of a dielectric resonator oscillator, properties of tuning mechanism must be considered. Sensitivity analysis by Higashi and Makino (1) gives formulas for desired action of the DR tuning gap for given temper

NOISE PERFORMANCE LATORS OF CAVITY STABILIZED FET HARMONIC-MODE OSCIL- O.A. Abo-Elnor* and K. Schlinemann* ABSTRACT In this paper, a cavity stabilized FET harmonic-mode oscillator is investigated. The cavity used is a reaction type cavity which is inserted in the fundamental or in the harmonic circuit. Comparison between these two cases is made by the calculation of PM and AM noise spectra fo