Effect of the Test Zone Field on the Radiation Characteristics of Antennas
Effect of the Test Zone Field on the Radiation Characteristics of Antennas
复制标题
测试区场对天线辐射特性的影响
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
D. Heberling
中科院分区：
文献类型：
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作者：
T. M. Gemmer;D. Heberling
天线测量室内的不期望的衍射或反射干扰期望的信号，导致偏离理想测试区场(TZF)。由此产生的非理想场会导致被测天线的测量参数产生误差。为了分析紧凑型天线测试靶场中TZF引起的频变误差，提出了一种基于球面波展开法的评估方法。为了生成TZF数据，在CARR的反射面模型上应用了全波技术，以近似真实的TZF。研究了三个尺寸和方向性不同的测量天线，并用等效误差信号电平评估了相应的差异。结果表明，为了实现高精度的天线测量，并为测量范围提供额外的设计可能性，必须应用测试区场补偿。
Undesired diffractions or reflections within an antenna measurement chamber interfere with the desired signal causing a deviation from the ideal Test Zone Field (TZF). The resulting non-ideal field causes an error in the measured parameters of an antenna under test. In order to analyse the frequency-dependent error caused by the TZF in a Compact Antenna Test Range (CATR), an evaluation method is introduced which is based on spherical wave expansion. To generate the TZF data, a full-wave technique is applied on the reflector model of the CATR approximating the real existing TZF. Three measured antennas which differ in size and directivity are investigated and the corresponding differences are evaluated using the equivalent-error-signal level. It is demonstrated that test zone field compensation has to be applied in order to enable high-accuracy antenna measurements and to provide additional design possibilities of measurement ranges.