电视接收机的天线系统是电视信号的接收、变换、传输和分配装置。它通过天线接收来自电视台的空间电视电波,并利用电磁感应原理把电场和磁场能量转换成高频信号电压和电流,再通过馈线(如同轴电缆或平行线)将电视信号馈送到用户的接收机输入端。如果是共用天线系统,不仅起信号的传输作用,还要起信号的分配作用。因此学习天线系统的基本知识,对解决某些实际应用问题是必不可少的。下面就电视接收天线的主要特性,接收机的重影与直接波干扰以及电视共用天线系统作简要介绍。 The television receiver’s antenna system is a television signal receiving, converting, transmitting and distributing device. It receives space television waves from a television station via an antenna and uses electromagnetic induction to convert electric and magnetic field energy into high-frequency signal voltages and currents. The television signal is then fed to the user’s reception through a feed line (such as a coaxial cable or a parallel line) Machine input. If it is a common antenna system, not only from the signal transmission, but also play a role in the distribution of the signal. Therefore, the basic knowledge of antenna system learning, to solve some practical problems is essential. The following is the main characteristics of the television receiver antenna, receiver ghost and direct interference and television antenna system for a brief introduction.