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对数周期天线是近几年来发展的一种电特性极为优良的宽频带天线.它能容易地设计得在大于1∶6的波段范围内达到天线方向图形、增益系数、输入阻抗均为一常数而同频率无关,主馈线上行波系数K≥0.6等较为理想的指标,经济指标也很好,只需2根支持杆塔,占地面积比目前广泛使用的菱形天线和鱼骨形天线要小得多,架设费用仅及鱼骨形天线的二分之一.作为接收天线时,还可利用一付垂直架设,一付水平架设而得到极化分集的效果.这一点在受场地条件限制而不能建造空间分集接收天线时,使用这种天线组成
Logarithmic periodic antenna is an extremely good wideband antenna developed in recent years.It can be easily designed to achieve the antenna pattern in the range of more than 1: 6, the gain coefficient and the input impedance are all constant And with the frequency has nothing to do, the main feeder upstream wave coefficient K ≥ 0.6 and other more ideal indicators, economic indicators are also very good, only two support towers, covers an area larger than the currently widely used diamond antenna and fishbone antenna is small More than one half of the installation cost of fish bone antenna .As a receiving antenna, but also the use of a pair of vertical erection, a pair of horizontal erection and polarization diversity effect .This is subject to site conditions and can not This space antenna is used when building space diversity receiving antennas