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引言高性能雷达天线促进了高性能天线测试技术的发展。低于主波束峰值50dB 的旁辨电平以及亚毫弧度的指向精度对于雷达天线来说,已经是普通的问题。通用的远场测量系统往往不适于精确地测试这样的天线。本文集中讨论采用近场测量技术测试雷达天线的方向图和增益。为提高天线测试精度,加快测试速度,降低测试成本,及提供除天线方向图和增益测量结果以外的天线诊断,研究了一种新的测量技术。表1示出当今一般雷达天线采用的测量技术一览表。
Introduction High Performance Radar Antennas Promote High Performance Antenna Testing Technology. Parallax levels below 50 dB of the main beam peak and pointing accuracy at sub-milliradians have been common problems for radar antennas. Common far-field measurement systems are often not suitable for accurately testing such an antenna. This article focuses on the use of near-field measurement techniques to test the radar antenna pattern and gain. In order to improve the accuracy of the antenna test, speed up the test, reduce the test cost and provide the antenna diagnosis besides the antenna pattern and the gain measurement, a new measurement technique is studied. Table 1 shows a list of measurement techniques used by today’s general radar antennas.