卫星通信线路的设计或分析一定涉及到天线增益。
Circuitry design and analysis must involve antenna gain in satellite communications.
该文从实际出发，通过卫星通信线路和地上线路的有机结合，构筑了低成本、高速率的基于卫星的远程教学系统，并在其上进行了模拟教学实验。
This paper constructs a new practical distance learning system that is low cost and high speed by the means of satellite LOG combining with ground connection well.
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