DIPlEXING NE1WORK FOR "FREQUENCY REUSE" E. Cavalieri d'Oro, P. Vita * ABSTRACT In telecorrmunication systems using the "frequency reuse", separation is needed both in frequency and in polarization. A new diplexing network with low insertion losses, high frequency and polarization isolation and snaIl sizes is presented. This characteristics are obtained using simple stop-band filters instead

REALISATION OF A 12 GHz HIGH POWER EXTRACTED POLE QUADRUPLEXER. H. Gregg and C.J. Radcliffe * ABSTRACT This paper gives the performance results of a high power 4 channel multiplexer operating at 12GHz, combining WARC channels 22, 24, 26 and 28 (n +2 spacing) onto a common antenna feed. The aim of the work was to produce a suitable output filter system for use in a TVBS satellite. An opti

DISPBRSION C~CTERISTICS OF -JNQtA~loPEH "",..~,t ~ WftBti--" "1 M. Kitliriak1, B. J8Oiozak ~ ABSTRACT Speotral domain 80alysis of single 80d ooupled open slot lines on magnetized ferrite substrate is presented. Dispersion oharaoteristios of guided hybrid mode are disoussed. Comparison with available data shCJB reasonable agreement. New physical phenomena oonneoted with equalizing of phase

mEORETICAL ANALYSIS OF MICROS TRIP LINES ON LAYERED SUBSTRATE HAVING LONGITUDINA LLY MAGNETIZED SEMICONDUCTOR L.V.Knishevskaya x V.K.Shugurov ~ . , U . ABSTRACT pic substrate Coupled microstrip lines bave been analysed (MSL) on layered by means of singular 6 -gyrotrointe- gral equations (SIE) in TEM-approximation taking into account losses in substrate. Configurations of electric fiel

A NEW TECHNIQUE FOR THE ANALYSIS OF PLANAR WAVEGUIDES'WITH MAGNETIZED FERRITE SUBSTRA-d R. Pregla, S.B. Wbrm~ ~ ~C/I.i~ d~ ~ Abstract It is shown, how the method of lines can be applied to the analysis of planar waveguides on ferrite substrate transversely magnetized in the plane of the substrate. Dispersion diagrams for micros trip and slotline on magnetized ferrite substrate are presented

rnARACfERISTICS SUBSTRATES OF VERY JJJ/{ I~EDANCE MICROSTRIP 'f.INES ON ISO/ANISOTROPIC Adaildo G. d'Assllll<;ao* and Attilio J. .rolaf ABSTRACT The method of moments was used to analyze micros trip transmission lines with low characteristic impedance. Characteristic impedances and effective permittivities calculated for the quasi-static model are shown for microstrips on isotropic and ani

THE NEW FOR MICROWAVE IF COMBINER RADIO RELAY SYSTEM Yuji Kitahara, Yoshio Ito, Toshiaki Arai, and Hikaru Honda ABSTRACT Nowadays, transmission of digital data is rapidly expanding. Especially, the transmission with more bitsjHz and greater hop distance are needed because efficient band use and economy are required. Under these conditions, the noise performance in a microwave radio syste

MICROWAVE PHASE MODULATORS FOR DIGITAL RADIO A. GIAVARINI * ABSTRACT A complete modulation Design line from 2 to 20 GHz 4DPSK (differential digital performances radio links phase shift keing) microwave modulators used in direct low and medium capacity and experimental is presented. criteria are shown. 

IMPLEMENTATION REGENERATIVE G. Ohm* AND PERFORMANCE SATELLITE OF A 14/11 GHz, 120 Mbit/s TRANSPONDER ABSTRACT This paper describes the i:Tlplementation and performance of an experimental 14/11 GHz, 120 Mbit/s regenerative satellite transponder designed for possible use in the European Communications Satellite (ECS) System. Quaternary DPSK and CPSK are applied on the uplink and downlink, respec

A MODIFIED 16-QAM MODEM FOR 140-MBIT/S RADIO-RELAY SYSTEMS H. Bessai, W. Lorek *) ABSTRACT A description is given of a 16-QAM modem for 140-Mbit/s radiorelay systems which requires no differential encoding because a reference phase is marked in the modulator. A fully automatic computer-controlled measuring system in connection with a fading simulator allowed the bit error rate to be measured as a