Display 2D far field patterns for frequency-sweep.
模式的频率，二维扫描显示远场。
The far field patterns and performances of antenna under measurement can be obtained rapidly and efficiently by this method compared to some conventional methods, the precision is good enough.
利用此方法可以依据天线平面近场测试数据快速简便地求得天线远场方向图及其它特性，其精度较高；
Based on the transmitted field the characteristic of interference and sensing between two modes is investigated and point out the disciplinarian of far field two-lobe radiation patterns.
建立在光纤中传输模场的基础上，研究了两模间干涉特性和传感特性，指出了远场两瓣光斑的动态变化规律。
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