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近几年来由于卫星上信号处理和误差修正技术的进步,人们能更有效地利用空间部分,又由于有功率更大、频率更高的卫星,从而使地面站的天线尺寸大大地减小,价格大幅度地降低。随着星上切换处理机不断地改进,增加了网络的灵活性,也降低了整个系统的价格。这有利于农村电话的发展。目前,商业通信卫星系统的发展,虽然仍受到有效功率限制的影响,但其发展速度还是相当可观的。由于卫星有效功率不断提高,使得卫星通信地面站天线从六十年代的
In recent years, thanks to advances in signal processing and error correction technologies on the satellite, people can make more efficient use of the space portion and, because of the more powerful and higher-frequency satellites, greatly reduce the size of the antenna at the ground station, Dramatically reduce. As on-board handlers continue to improve, increasing network flexibility and lowering the price of the entire system. This is conducive to rural phone development. At present, the development of commercial communications satellite systems, although still subject to effective power constraints, but its rate of development is still considerable. Due to the continuous improvement of the effective power of satellites, satellite communications ground station antenna from the sixties