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随着我国电视广播事业的迅速发展,电视台及电视差转台逐渐增多,电视台的同频干扰严重地影响边远地区电视的接收与差转质量。在VHF频段,同频干扰则更为突出。本文结合在建电视差转台中制作抑制同频干扰天线的实践,对抗同频干扰天线的设计与调整方法作一些介绍,供建立电视差转台和共用天线系统的单位参考。一、同频干扰的产生及其影响当接收地点在同一频道内有两个(或两个
With the rapid development of television broadcasting in our country, the number of TV stations and TV stations has been gradually increasing. The same-channel interference of television stations has seriously affected the quality of TV reception and transfer in remote areas. In the VHF band, co-channel interference is even more prominent. This paper combines the practice of making co-channel interference suppression antenna in the construction of TV differential turntable to introduce some countermeasures to the design and adjustment of co-channel interference antenna for the reference of setting up the unit of TV differential turntable and common antenna system. First, the same frequency interference and its impact When the receiving location in the same channel there are two (or two