论电离层垂测天线

Analysis of antenna for ionospheric vertical detection

行波直导线是构成垂测天线的基本单元,它的场频特性主要取决于基频和倾角。按场频特性区分,直导线可分为三类,早期的垂测天线可分为三类,标准Delta天线就是其代表。五边形天线合理利用了两个超宽强场区,使该天线不仅有高而平稳的场强而且能轻易达到二十倍频以上带宽。准菱形和双列角齿形也有良好性能,但对比证明五边形天线是最佳电离层垂测天线。

Travelling wave straight line is the basic unit of ionospheric vertical detection antenna, its basic frequency and obliquity is main factor of performance of antenna. The early ionospheric vertical detection antenna may be sorted into three kinds, and the normative Delta antenna is representative one. By utilizing two field regions with stronger EM field intensity, the pentagon antenna has not only higher EM intensity, but also over twenty times frequency bandwidth. By comparing, lthough both like rhombus and two tier hackle antenna also have good performance, the pentagon antenna is one best choice for ionospheric vertical detection.