ELECTROMAGNETIC SATELLITES Paolo (tJ SCATTERING PROPERTIES OF SOLAR-CELL PANELS TO BE USED ON Corona(tt), Guglielmo d 'Ambrosio (H), Giorgio Franceschetti (tH) Abstract The scattering properties of solar-cell panels to be used on satellites are experimentally exploited. Measurements are made on individual solar cells inserted into waveguides (KU band) and then on solar-cell panels in anae

A GENERAL NUMERICAL TECHNIQUE FOR THE ANALYSIS RESULTS OF DIFFRACTION GRATINGS, NUMERICAL M. K. Moaveni*, H. A. Kalhor*, and A. Afrashteh ABSTRACT A general numerical technique has been previously suggested by the authors for analyzing the diffraction of plane electromagnetic wave by gratings of arbitrary groove shape [1]. In this paper, numerical solutions for rectangular and echelette gr

A New Mathematical Perfectly Conducting Formulation Periodic for Studying Structures. the Scattering Properties of Antonio Roberto Panicali * Previous methods for studying the scattering properties of per fectly conducting periodic structures were derived with basison the boundary conditions the fields must satisfy at the structure sur face; in this work it is shown that those scattering

THE MICROWAVE CONTRIBUTIONS TO SATELLITE COMMUNICATIONS Rudiger TEUPSER * ABSTRACT Satellite communications are largely based on the efficient exploitation of microwave techniques. During the past decade, developments in this field have already led to a wide range of equipment becoming available for commercial use. In this survey of the current activities, some of the more important develop

RECENT ADVANCES IN RADIO-WAVE PROPAGATION ABOVE 10 GHz Francesco Fedi 1. INTRODUCT ION The increasing need for util ization of frequencies above 10 GHz for terrestrial and space radiocommunications studying, measuring and predicting tions have on radio-wave propagation has intensified the interest in the effects which atmospheric condiat these frequencies (1, 2, 3). and depolarisation of wh

A NEW FACILITY FOR THE INVESTIGATION OFLOW NOISE MILLIMETER WAVE TECHNIQUES A. G. Cardiasmenos*, G. R. Huguenin*, K. S. Yngvesson** ABSTRACT This paper describes a new state-of-the-art facility for millimeter-wave radioastronomy and instrumentation research presently nearing completion at the Five College Radio Astronomy Observatory (FCRAO), in Amherst, Massachusetts, U.S.A. The system, emp

SCINTILLATIONS DUE TO RAIN ON SATELLITE-TO-EARTH RADIO LINKS C. CAPSONI - M. MAURI - A. PARABONI (°) ABSTRACT In this paper the signal fluctuations arising at the receiving antenna on a satellite-to-earth radio-link during intense precipitations are studied. The four Stokes parameters, which fully describe the power and the polarization status of the wave, are evaluated in the 11 to 30 GHz





WAVEGUIDE TESTS BY MEANS OF ERROR RATE MEASUREMENTS AT DIFFERENT CLOCK RATES OF 640, 320 AND 160 Mbits/s Werner Lorek *) ABSTRACT For determining the transmission properties of waveguide links, an experimental repeater for one channel with variable bandwidth was designed for error rate measurements at clock rates of 160, 320 and 640 Mbits/s. The length of the experimental waveguide link used a