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。
The influence of duty ratios on the interference patterns in the far field is studied. Main factors that affect the cavity loss are analyzed.
研究了光束占空比对远场光斑的影响，分析了影响腔内损耗的主要因素。
The output characteristics of the ASE amplifier are experimentally studied. The ASE far-field patterns for the lowest waveguide mode are obtained in agreement with theroy.
实验获得放大自发辐射的远场光斑图样与理论计算比较基本一致，并对放大自发辐射输出特性进行研究。
The patterns of near field and far field are compared through experiment. Considering the fact, an experiment is made on the testing error caused by distance error and frequency drift.
考虑到实际应用，对距离标定误差和频率漂移引起的测试误差进行了实验研究。
The patterns of near field and far field are compared through experiment. Considering the fact, an experiment is made on the testing error caused by distance error and frequency drift.
考虑到实际应用，对距离标定误差和频率漂移引起的测试误差进行了实验研究。
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