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A high performance of an antenna defines the quality of service of a communication system. The most widely used narrow beam antennas in satellite communication systems are reflector types such as Cassegrain and Garegorian. This paper provides a design and analysis for obtaining high performance of antenna specific to Cassegrain antenna considering the effects of losses in the system. The efficiency of the antenna system is discussed, and parametric curves showing losses as a function of the Cassegrain design parameters are presented. The performance of the designed antenna system leads to the useful relationships for choosing the design parameters for optimum gain performance.
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