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1、引言在过去的几年中,由于工作在 VHF/UHF 频段的无线电话机数量的急剧增加,使得共用一个区域的问题变得日趋严重,这样,在一个有限的区域内,许多系统可能以不同的频率工作。例如,世界各地的许多机场电台就是在这样的情况下工作的。在世界上各个不同的区域内 VHF/UHF 通信业务的不断增加又引起了许多干扰问题。采用双频工作已经减少了不希望的效应,但在某些国家,坚持采用单频工作已经造成了问
1. Introduction In the past few years, the problem of sharing a single area has become more serious as the number of radiotelephones in the VHF / UHF band has dramatically increased, so that in a limited area, many systems may Different frequency work. For example, many airport radios around the world work in such situations. The growing number of VHF / UHF communications services in different regions of the world has caused many disturbances. Using dual-band work has reduced the undesirable effects, but in some countries, sticking to single-frequency work has caused problems