在高楼林立的市区有电视重影。重影往往是影响电视接收质量的主要原因。为了减弱重影的影响,应选择有锐方向特性,高前后辐射比(F/B)的室外电视接收天线来降低产生重影的反射波的影响。有时还必须改变电视天线的接收指向,或者寻找最佳的接收位置。但常用的高 F/B 电视接收天线的结构很大(带有多根引向、反射器),不便安装。常见的高 F/B 电视天线是窄频带的,不宜作为宽频带天线来同时接收多 There are television ghosting in the high-rise downtown area. Ghosting is often the main reason that affects the quality of television reception. In order to reduce the influence of ghosting, an outdoor television receiving antenna with sharp directional characteristics and high front / rear radiation ratio (F / B) should be selected to reduce the influence of ghost reflected waves. Sometimes it is also necessary to change the reception direction of the television antenna or to find the optimum reception position. However, the commonly used high-F / B television receiving antenna has a large structure (with multiple leads and reflectors), which is inconvenient to install. Common high F / B TV antenna is a narrow band, not as a broadband antenna to receive more