采用扩展矩量法对两种不同开头旋转对称单极天线进行了分析研究，得出了最佳锥角和天线下限频率随天线高度变化的曲线，设计制作了一下限频率为１０００ＭＨｚ的天线来验证此，另外制作了一中心频率为７５０ＭＨｚ用于冲激雷达的放置对称单极天线，均采用扩展矩量法进行了分析，与部分测试结果相比较，两者吻合较好，为工程设计提供了理论依据。

Two kinds of configurations of rotationally symmetric monopole antenna are analyzed and studied by applying extended moment method. The optimum angle of cone is obtained and the curve of the low-cut frequency versus height has been discussed.A rotationally symmetric monopole antenna with low-cut frequency of 1000MHz is designed and fabricated for checking the curve. In addition a broad band antenna with center frequency of 750MHz is designed and fabricated for impulse radar. All of them are analyzed by the extended moment method. Theoretical calculation and some experimental results are compared and reasonably agreement is obtained,the research provides theoretical basis for practical design.

TN957.2