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卫星通信、VSAT 卫星通信及其特点卫星通信是指利用人造地球卫星作为中继站,转发无线电信号,在卫星地面站之间进行的通信。如图1所示。由图中可以看出,在一颗卫星无线电波束所覆盖的地球表面区域内,各个地球站都可以通过卫星中继转发信号来进行通信。因此可以说卫星通信是地面微波中继的发展,是微波中继通信的一种特殊形式。
Satellite communications, VSAT satellite communications and their characteristics Satellite communications refer to the use of artificial earth satellites as relay stations for relaying radio signals for communications between satellite ground stations. As shown in Figure 1. As can be seen from the figure, in the area of the Earth’s surface covered by a satellite radio beam, each earth station can relay signals through satellite relays for communication. So we can say that satellite communication is the development of ground microwave relaying and is a special form of microwave relay communication.