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随着卫星传输技术的提高,已研制成功成本低、体积小、集成度高的“甚小天线口径终端”(VSAT)的地球站。VSAT主要用于直接向星形网络配置中的用户提供信息。它由一个具有大天线的主站与许多小天线的端站组成有效的传输链路,并能构成性能高、投资省的VSAT通信网。VSAT网络既可以用于单向通信,广播视频、音频或数据信号;又可以用于双向通信,在
With the improvement of satellite transmission technology, the earth station of “very small antenna terminal” (VSAT) has been successfully developed with low cost, small size and high integration. VSAT is primarily used to provide information directly to users in a star network configuration. It consists of a large antenna with the main station and many small antenna terminal station to form an effective transmission link, and can form a high performance, investment-saving VSAT communication network. The VSAT network can be used for both one-way communications, broadcast video, audio or data signals; it can be used for two-way communications as well