... half-power frequency 半功率频率 half-power width 半功率宽度 half-power beamwidth 束宽度 ...
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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.
同时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。
At the same time under the direction of Figure lobe half-power beam width of the main requirements to determine their unit number and unit spacing.
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