半功率波束宽度

所设计的微带贴片天线在设计频段内反射损耗小于-20dB，半功率波束宽度大于±60°。

The return loss is less than-20 dB and the half power beamwidth is more than ± 60 ° within design frequency of the designed antenna .

导出了用天线方向图的半功率波束宽度快速计算口径天线方向性系数和增益的简单表达式，分析讨论了这些公式的应用范围。

The simple formulae of fast calculating aperture antenna directivity and gain are derived using antenna beamwidths . Applied range of these formulae are analyzed and discussed .

根据方向图副瓣要求，用泰勒综合法得到其幅度分布，相位采用等相分布。根据方向图主瓣半功率波束宽度要求确定其单元数和单元间距。

Under the direction of pattern sidelobe request , Taylor synthesis method is used by its amplitude distribution , phase by phase as distribution under the direction of the pattern beamwidth requirements determine the number and the unit spacing of the element .

宽波束圆极化卫星电视接收天线阵具有较好的反射特性、轴比特性和较宽的半功率波束宽度，基本满足设计要求，实物样品的测试结果与仿真结果吻合较好。

The wide-beam circular polarization satellite TV receiver antenna array has a better reflection characteristic , its axial ratio and the half-power beam width can basically meet the design requirements , agreement can be observed between the measurement results of the prototype and the simulations results .