论文部分内容阅读
1.引言近几年,微波无线电通信,以地面通信及卫星通信为中心,获得了迅速发展。予计今后无线通信业务更会继续增大,随着10GHz以上新频段的开拓,实用价值高的现用频段的所谓频谱复用的想法也日益高涨。特别是拟于1979年发射的国际通信卫星V号,准备在每个单一极化所用的4/6 GHz频段上,使用基于同一频率的正交极化共用技术。为实现正交极化共用,要迅速提高天线及馈源装置的极化特性,与此同时,补偿降雨引起电波传播上的极化特
1. Introduction In recent years, microwave radio communications have enjoyed rapid development centering on terrestrial and satellite communications. It is expected that wireless communications services will continue to increase in the future. With the development of new frequency bands above 10GHz, the idea of so-called spectrum multiplexing in active frequency bands with high practical value is also on the rise. In particular, International Telecommunications Satellite V to be launched in 1979 is prepared to use common polarization-sharing techniques based on the same frequency in the 4/6 GHz band for each single polarization. In order to realize the orthogonal polarization sharing, it is necessary to rapidly increase the polarization characteristics of the antenna and the feed device, and at the same time, compensating for the polarization of radio waves caused by rainfall