A MINIATURE HYBRID L-BAND OPERATED FSK TRANSCEIVER BATTERY Charles N. Herbert + and Gerald W. Wong + ABSTRACT This paper describes a miniature transceiver which consists of three main sections: 1) a receiver portion with three active mixers, thick film limiter, and modem; 2) a transmitter portion with three active upconverters and a gated power amplifier; and 3) a local oscillator section

DESIGN AND SPECIFICATION 11 GHz 140 Mbit/s DIGITAL OF A BROADBAND R.F. QPSK MODULATOR FOR AN USING MIC TECHNIQUES RADIO SYSTEM R.L.A. Goodings and J.M. Robinson ABSTRACT The design of a broadband QPSK R.F. phase modulator for use in an 11 GHz 140 Mbit/s digital radio system is described, in which attention was given to achieving as large an instantaneous bandwidth as possible. A new swit

THE APPLICATION DIGITAL MICROWAVE OF SPECTRUM RADIO CONSERVING SYSTEMS MODULATION METHODS TO HIGH-CAPACITY RELAY G. D. Richman ABSTRACT The planned introduction of digital switching by the British Post Office has motivated the development of high capacity digital transmission systems. It is intended that the radio relay bands currently carrying FDM-FM analogue transmissions will be re-used

Small K-band Mobile Earth station for Domestic Satellite Communication S.Egami, T.Okamoto and H.Fuketa Abstract A simple and small K-band (30/20GHz) mobile earth station for domestic satellite communication was developed. This mobile earth station ( MES ), with 2.7mm non-divided Cassegrain antenna, has 132CH telephone transmission capacity and can be transported to any desired location

THE CHARACTERISATION OF AN EXPERIMENTAL LABORATORY 30/20 SATELLITE REPEATER FOR DIGITAL TRANSMISSION GHz A. Woode ABSTRACT The trend flexibility for higher capacity, systems will make use of the lower millimeter wave bands, with uplink of 30 GHz, downlink for civil communications satellites and increased sophistication. is Future 20 GHz and potential bandwidth of 3.5 GHz. In 1975 ESA instigat

FAST, FULLY-REDUNDANT, 4 GHz, 8 x 8 MICROWAVE SWITCH MATRIX FOR COMMUNICATIONS SATELLITES Fran~ois ASSAL*, Xavier ROZEC** ABSTRACT - A lightweight, low-power-consuming, MIC, 8 x 8 microwave switch matrix has been developed for communications satellites at the 3.95 GHz center frequency. The broadband, cross-bar configuration has been implemented to provide full interconnect flexibility within t

120-Mbit/s, SATELLITES 6 GHz ON-BOARD WAVEFORM REGENERATOR FOR COMMUNICATIONS T. Shimamura*, I. Eguchi* Francois Assal** ABSTRACT A lightweight, low-power-consuming, differentially-coherent four-phaseshift-keyed (DQPSK) on-board waveform regenerator (OBWR) was developed for communications satellites in the 6 GHz up-link frequency band to process 120 Mb/s time-division multiple access (TD

EFFECTS OF SCATTERINGSBY FEED AND STRUTS ON THE RADIATION PATTERNOF THE PARABOLOID P. BRACHAT., Ingenieur P.F. COMBES., Docteur ABSTRACT Civil des Telecommunications es Sciences, Universite P. SABATIER We determine the radiation pattern of a paraboloid by using the G.T.D. in its largest part as well as the aperture field and equivalent currents methods in the areas, around the forward and rear

CROSS POLARIZATION CHARACTERIS'fICS 01<" CASSF:GRAIN LOIDAL ANTENNA WITH DIELECTRIC FEED ROD * CONFOCAL PARABO- H.D.Hristov and N.M.Kirov ABSTRACT The cross polarization properties of Cassegrain paraboloidal antenna with a dielectric rod as a plane wave source, fed by cylindrical metal waveguide is mainly studied in this paper. The proposed theory describes quite precisely the basic radiation

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