短波水平极化测向中的交叉极化波

Cross polarization wave in HF D-F system of horizontal polarization direction antennas

通过对水平偶极子和定向天线的计算,分析了水平天线对主极化波和交叉极化波不同的幅相响应特性,并讨论了到达接收点的两个正交极化波之间的相关性和相干性,进而讨论了交叉极化波对水平极化测向精确度的影响。

In this paper, the amplitude and phase responses of the HF horizontal DF antenna are discussed by calculating the dominant polarization field and the cross polarization field of the horizontal dipole and horizontal log-periodic dipole antenna over the ground plane. The influence of cross polarization field on the HF DF system of the horizontal polarization direction antennas is analyzed. Measurements on HF links show that the correlation coefficient between the dominant polarization wave and cross polarization wave, reflected from the ionosphere, lies between 0.09 and 0.5, and the coherency of them also decreased.