X3VOS - 40 GIIz MDLTIaIANNEL TV to the HOME Mike Pi1grm ABS'.mACT *, Richard D Carver *, & Brian C Barnes * Microwave distribution of multichannel entertainment TV direct to the home has received much recent attention, both from delivery system operators and from the Governments who licence their operations. The low microwave spectrum is congested, and much in demand for mobile conununic

ETS-VI ON-BOARD COMMUNICATIONS DYNAMIC SWITCHES FOR MULTI-BEAM SATELLITE Katsuhiko ABSTRACf Araki * , Masayoshi Tanaka * This paper describes a large scale on-board monolithic IC IF-band switch matrix (IF-SW) and a new type of on-board high-power high-speed RF-band switch (RF-SW), which ensure a flexible and efficient satellite-switched TDMA (SS-TDMA) system. In order to reduce the size

Ku-Band Jean-Louis MMIC's for Space-Borne Active Antenna and Jean-Michel CAZAUX, Daniel ROQUES, Michel POUYSEGUR MEROUR ABSTRACT A full set of Ku-Band monolithic integrated circuits designed for a spatial telecommunication active antenna is presented. Low Noise Amplifier, Medium Level Amplifier, Mixer, Attenuator and Digital Phase-Shifter are detailed and the measured results are discussed. T

SATELLITE DATA COLLECTION SYSTEM AT Ku-BAND Terje Pettersen ABSTRACT The paper describes a system dedicated to the collection of low-rate data by small, unattended and inexpensive remote earth stations operating through conventional satellite transponders at Ku-band. The high phase noise and frequency drift environment has been the limiting factor in introducing this kind of system. A system using

Multi-beam Mobile Satellite Communications' Transponders and System Masato Tanaka* ,Shigeru Kimura**,Naoya Batori*** Hitoshi Mizutamari***,Akira Akaisn*** 1.ABSTRACT With an expansion of social and economic activities, a role of advanced mobile communication systems like INMARSAT system becomes significant. We participated in a development program of transponders and subsystem of multi-beam satel

AN OVERVIEW NETWORK M. MELANI ABSTRACT This which paper will *, OF THE ITALSAT DIGITAL SATELLITE COMMUNICATION PREOPERATIONAL M. DONATI ** describes start the Italsat satellite with digital communication terrestrial up to 24.000 TV). network telephonic to be integrated phase (data, the italian will provide network during the preoperational phase commencing in following circuits o

A RIGOROUS PROCEDURE FOR ANALYSING MICROWAVE PLANAR PRINTED BOARD ANTENNA SYSTEMS Safieddin Mehrdad Department Safavi-Naini, Mosadeghi-Rad, of Electrical Sasan Ahmadi. and Hamed Rouhbakhsh. Engineering, University of Tehran. ABSTRACT Based board a genral radiation been quency upon the generalization of the conventional formulated models diffraction mutual for printed mechanisms, effects, a

BROADBAND TWO-DIMENSIONAL PRINTED ANTENNA ARRAY A.Ne~iC., D.PaunoviC., M.Mikavica. and S.Suvakov. ABSTRACT The concept, design and realization printed antenna with a 128 trapezoidal covers 8-16 GHz frequency range with VSWR is below 2.3 while the total loss of the broadband dipoles has been a gain of between is about 4 dB. two-dimensional presented. Antenna 24 dB and 27 dB. 

RAPID FAST FOURIER TRANSFORM PHASE ALIGNMENT OF AN ELECTRONICALLY SCANNED ANTENNA Harold Shnitkin* ABSTRACT Low sidelobe performance of a 1-D phased array antenna demands tight aperture phase tolerances, which require periodic retesting and phase correcting of the array elements to compensate for phase errors arising from aging, thermal deformation and component replacement. To accomplish such pha

WIDE-BANDWIDTH SUBARRA YING PHASED ARRAYS USING RANDOM Amit P. Goffer*, Moshe Kam * and Peter R. Herczfeld* ABSIRAcr Beam steering with phased arrays requires the use of true-time-delay devices when communicating a wideband signal. In many applications, this requirement cannot be met, due to size and cost limitations, and the array is divided into subarrays: each element is implemented with a p