~ TUNABLE MICROWAVE FILTERS USING YIG GROWN BY LIQUID PHASE EPITAXY" I.T. Simpson, I.F. Morton, J.M. Owens, R.D. Pringle+ ABSTRACT Original work is described on the application of refinements in Liquid Phase Epitaxy (LPE) of yttrium iron garnet (YIG) to the fabrication of tunable microwave filters. The advantages in cost and performance of this approach over the conventional YIG s

A LIGHT WEIGHT GRAPHITE FIBER EPOXY FOR SATELLITE COMPOSITE APPLICATION (GFEC) WAVEGUIDE MULTIPLEXER C. M. Kudsia* and ABSTRACT M. V. O'Donovan** This paper describes the synthesis, optimization and realization of a noncontiguous six-channel multiplexer composed of filters fabricated" using GFEC as the basic waveguide material. This material is much lighter than Invar but possesses a sim

PERFORMANCE OF A TWIN-CHANNEL OPTICAL COMMUNICATION SYSTEM B. Daino*, M. Galeotti* and D. Sette" ABSTRACT The results of an investigation on the performance of an optical communication link in the area of Rome are described. Binary pulse polarization modulation at 76 Mbit/sec has been used, with a helium neon laser working at 6328 achieving Å and a propagation path 3.6 km long. The po



THE 14/12 GHz COMMUNICATIONS TECHNOLOGY SATELLITE L.D. M.V. Braun* O'Donovan** TRANSPONDER OF THE COMMUNICATIONS ABSTRACT The Communications Transponder of the Communications Technology Satellite incorporates a number of advanced-technology units designed to provide a reliable, high-power, microwave communications capability at 14/12 GHz for experimental purposes. The advanced-technology units

13 GHZ PCM Per Fremstad LINK. ABSTRACT. An all solid state 13 GHz link for transmission of 32 and 120 channel PCM signals has been developed at NERA AS, Division Bergen. The latest developments in solid state design has been utilized in the design. The transmitter power is generated oscillator followed by a microstrip by a phase broadband locked 2 GHz microstrip multiplier. The receiver local o

11 GHZ FM RADIO By Pierre Noesen * LINK ABSTRACT The paper describes an FM radio link in the 11 GHz frequency band with a capacity of up to 1800 telephone channels and a transmit power of 20 W. After a general outline of the system, some of the critical microwave components are described. Special care was taken to achieve low loss for the branching networks and negligible thermal noise for the a

A COMPACT 960/1800 TELEPHONE CHANNEL 6 GHz RADIO RELAY EQUIPMENT *H.D. Hyamson and tL.~. Stagg ABSTRACT A new 6 GHz radio relay equipment is described which includes a number of broadband microwave integrated circuits. These have been constructed using novel techniques which enable a number of microwave elements to be included on a single substrate. Use of integrated circuits has result

THE ANALYTICAL GUIDE T.E. APPROACH TO THE FULL-BAND APPLIED MATCHING IRISES OF WAVEAND STEPS DISCONTINUITIES Rozzi and F.C. TO CAPACITIVE de Ronde ABSTRACT It is current practice to match a given discontinuity in waveguide by means of an identical one (matching element) placed a quarter-wavelength away from the first. For accessible discontinuities, a superior technique consists in placing