In order to realize the gain stability of antennas in their frequency bands and the requirement of miniaturization, the design methods of the equalizer in the form of lumped-element and microstrip are both employed. The equalizing networks of ring direction-finder antennas are designed. 为了实现天线在工作频带内的增益稳定度,且考虑到小型化要求,分别采用了集总元件式功率均衡器和微带式功率均衡器两种设计方法,设计了各频段圆环测向天线的均衡网络。