The alignment of a spherical near-field measurement system using electrical measurements
The alignment of a spherical near-field measurement system using electrical measurements
复制标题
使用电气测量对准球形近场测量系统
DOI：
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复制
发表时间：
1998
期刊：
影响因子：
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通讯作者：
G. Hindman
中科院分区：
文献类型：
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作者：
A. Newell;G. Hindman
在进行球面近场测量时，机械旋转器必须正确对准，探头必须放置在正确的位置。这种对准通常使用光学仪器来完成。在某些情况下，将对准镜放置在AUT上可能不切实际，或者光学仪器可能不可用。在这些和其他情况下，最好用实际AUT和探头上的电气测量值检查对准情况。这种测试以前已经开发和验证。适当的比较和分析两个近场测量，应该是相同的或有一个已知的差异产生一些旋转器和探头对准误差的精确测量。虽然这些测试独立于AUT模式，但天线的明智选择或放置可以增加测试的灵敏度。使用NSI软件中包含的分析提供典型测量。
The mechanical rotators must be correctly aligned and the probe placed in the proper location when performing spherical near-field measurements. This alignment is usually accomplished using optical instruments. In some cases it may be impractical to place the alignment mirrors on the AUT or optical instruments may not be available. In these and other cases, it is desirable to check the alignment with electrical measurements on the actual AUT and probe. Such tests have previously been developed and verified. Appropriate comparison and analysis of two near-field measurements that should be identical or have a known difference yields precise measures of some rotator and probe alignment errors. While these tests are independent of the AUT pattern, judicious choice or placement of the antenna can increase the sensitivity of the test. Typical measurements are presented using analysis included in NSI software.