11 GHz PARAMETRIC AMPLIFIER FOR COMMUNICATIONS VIA SATELLITE ~) C.Bassi, T. D'Arcangelo ABSTRACT The 11 GHz band range is getting parametric to cover popularity amplifier for communications has therefore needs been via satellite. in this (Inexperiments traffic A new uncooled frequency telsat designed the operational as those of commercial V satellites) as well of specific communicatio



TRADE-OFF BETWEEN INTERMODULATIONS TRANSISTOR POWER AMPLIFIER W. AND THERMAL NOISE IN A SATELLITE Kriedte and M. Lopriore~ Abstract When a non-linear power amplifier is signal, intermodulation products are In order to quantify this impairment resolved; first whether the IM spectra carriers have any residual subjective equivalent noise level to be added to budgets. This paper answer the descr

RELIABLE CROSSTALK Werner ABSTRACT PREDICTION OF INTERMODULATION SATELLITE INTERFERENCE AND IN NONLINEAR TRANSPONDERS SCHREITMULLER The prediction of multicarrier performance in nonlinear satellite transponders is essential for optimizing a communication system providing frequency division multiple access (FDMA) operation. In general satellite nonlinearity is determined by the traveling wa

GO SYNTHESIS OF REFLECTORS USING COMPLEX COORDINATES B.S. Westcott and F. Br1ckell . * ABSTRACT. Recent theoretical work on direct GO synthesis of reflectors for two variable far-field and point source feed pattern specification is described. The mathematics is simplified by the use of complex coordinates and stereographic projection. Reflector properties are formulated in terms of the ma

COMPLETE RADIATION PATTERN OF PARABOLIC REFLECTORS, INCLUDING THE EFFECTS OF A LOADED RIM V. Daniele + ,I. Montrosset ++ , M. Oreflce . + , R. Zich + ABSTRACT -------This paper deals with the calculation of the complete radiation pattern of a parabolic reflector antenna by using the induced currents method and the geometrical theory of diffraction in different regions, extended in

A MULTIFEED OFFSET REFLECTOR ANTENNA FOR THE INTELSAT V COMMUNICATIONS SATELLITE C. C. Han* ABS TRAG T An array-fed offset reflector antenna is used to provide shaped hemispheric and zonal coverage for the INTELSAT V communications satellite. The objectives of frequency reuse via both sidelobe isolation and crosspolarization isolation and efficient beam shaping are accomplished by optimizing fee

SHAPED-BEAM ANTENNA WITH LOW CROSS POLARIZATION N. Chr. Albertsen ABSTRACT. It is well known that low cross polarization may be obtained in a conventional high gain antenna with rotational symmetry when a Huygens source is used to illuminate the reflector surface. In satellite communication links it is, however, often desireable to have an elliptic beam with extremely low cross polarization.

FREQUENCY DEPENDENCE OF CORRUGATED HORN MODE ORDER A.Marincic* B.Milovanovic + ABSTRACT Corrugated conical horns are extensively used as radiators where a relatively broadband and symmetrical radiation patterns are needed. The properties of these horns were investigated by many workers, both theoretically and experimentally. In some works frequency variation of groove wall admittance was ignor

MATHEMATICAL MODELLING OF THE RADIATION FIELDS FROM MICROWAVE PRlMARY- FEED ANTENNAS N A Adatia A W Rudge C Parini ABSTRACT Numerical modelling of reflector antenna radiation fields has received considerable attention in the literature and techniques based upon Physical-optics are widely employed. A major limitation in the application of such techniques is the accurate mathematical modellin