LOW-COST DOWNCONVERTER FOR UK DEMONSTRATION DISTRIBUTION BY MILUMETRE-WAVES P. G. Wilson and I. G. Gosling OF TV ABSTRACT Five receiver downconverters have been produced, tested and deployed for a demonstration of TV distribution by millimetre-waves. Input signals in the 29GHz band are downconverted to 0.95-1.75GHz, and fed via a coaxial downlead to a DBS-compatible indoor demodulation unit. Mon

VERY SMALL AND LIGHT KU-BAND LOW NOISE CONVERTER WITH LOW NOISE FET MIXER TOMOZO OHTA, MASAO MIYAZAKI, NAOKI OKAMOTO AND KAORU OKABE* l)~bstract The very small sized and light weighted satellite receiving converter with excellent characteristics has been developed for the Ku-band. The very low noise FET mixer is newly developed and used for the converter. Because of the realization of the low no

LOW-NOISE FRONT ENDS FOR PROPAGATION EARTH TERMINAL I.M.ANGELOV, L.K.URSHEV, A.S.YANEV, L.Z.KOKONTCHEV, A.Y.SPASOV, M.M.PETROV, I.K.STOEV,S.GEORGIEV * SUMMARY In this paper the realization and the characteristics of lownoise front ends designed for a propagation earth terminal are described. The devices are intended for 11-, 20- and 30GHz bands. Their construction and performance are presented as

POLARIMETRIC ATTENUATION RADAR MEASUREMEN1'S AND DEPOLARIZATION OF RAIN AND RADAR IN RAIN AT 20/30 GHz DERIVED G. Schnabl') ABSTRACT Propagation properties of rain are derived from radar measurements. The radar measurements of rain have been performed using the polarimetric DFVLR weather radar. Measurements of the horizontal reflectivity, differential reflectivity and linear depolarization ra

Experimental System and Measurements of Transhorizon Signal Levels at IlGHz E. Vilar. S. Hancock, C. Spillard, A. Tawfik ABSTRACT The paper describes the experimental receiving system which operates at 11.6 and 1O.7GHz to monitor transhorizon signa1 levels over two paths across the English Channel (La Manche). The structure of the receiver is described and the automatic/remote operation proced

RAIN ATTENUATION FROM WEIBULL RAINDROP-SIZE DISTRIBUTION Matsuo Sekine * , Toshimitsu Musha * and Chii-Dong * Chen' ** ABSTRACT The rain attenuation from 1 to 1000 GHz was calculated by using a Weibull distribution for raindrop-size. The microwave experimental measurement data from 8 to 312.5 GHz were compared with our calculations. Especially, comparison between the submillimeter meas

A STABLE METHOD OF REMOTE SENSING OF THE HEIGHT PROFILE REFRACTIVE INDEX OF TROPOSPHERE OF V.I. Ponomaryov. A.I. Gorb* ABSTRACT To solve the inverse problem of remote sensins of the height profile of the Troposphere Refractive Index {TRI) the authors suggested a stable method based on the a priori information that the sought solution belongs to a known compact class of functions. Results obtaine

GaAs FULLY MONOLITI-IIC X BAND SPDT SWITCH WITH INTEGRATED TTL COMPATIBLE DRIVER C. VERSNAEYEN, M. GAVANT. S. ABSTRACT RUGGERI and M. LE BRUN This paper describes the performance of a GaAs monolithic X-Band SPDT switch with integrated BFL driver TTL compatible. A single TTL connnand voltage is needed to switch the RF signal from one channel to the other. From 8 to 12 GHz, the insertion loss is

VERY SMALL AND WIDE BAND MMIC MAGIC-T USING MICROSTRIP LINES ON A THIN DIELECTRIC FILM. Takahiro HIRAOKA*, Tsuneo Masayoshi AIKAWA* TOKUMITSU*, Toshiaki TANAKA** and ABSTRACT This paper describes newly developed MMIC magic-Ts (1800 hybrid circuits) using microstrip lines on a thin Silicon-Oxynitride (SiON) dielectric film. The thickness of the thin film is several micrometers. The quarter-wa

BROADBAND PHASE SHIFTERS CIRCUITS USING RC-ALLPASS-NETWORKS AND ACTIVE BALUN E. Menzel, ABSTRACT B. Schiek, A. Gronefe1d* Synthesis procedures for symmetrically and unsymmetrically loaded RCallpass bridge circuits are presented. Phase shifters with 90º ± 20º from 1 MHz to 4 GHz are obtained by switching between two RC-allpass networks of second order and a section of line in one of the RC-a