期刊文献+

基于光学测量的大型天线测试方法研究 被引量:4

Radiation Patterns of Big Antennas Based on Optics Measurement
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摘要 提出了一种基于光学照相的电磁场数值计算测试电大尺寸天线辐射特性的新方法.根据光学照相实测大型天线的形面三维坐标计算出天线表面电流分布,利用物理光学计算得到天线远场方向图和增益.采用该方法得到的海洋二号校正辐射计观测天线和充气天线的辐射特性与平面近场测试结果的对比验证了其具有足够的准确性.该方法具有快速、灵活的特点,可以推广到电大尺寸天线测试. A new method to measure the large-aperture antenna ramatlon patterns was proposed. It is difficult for far-field, near-field and CATR measurement to meet the measurement requirements of electrically large antenna. Surface measurement of parabolic reflector antenna by photogrammetry at multiple points can achieve high accuracy, even electronic theodolite and laser interferometer can achieve more accuracy to meet surface measurement requirement of large-aperture terahertz antenna. This method used the data obtained by actual optical measurement to simulate the real antenna radiation by physical optics method. Because of using the real antenna measured data, this simulation method gave the actual antenna gain and radiation results. The simulation results agreed well with the antennas patterns obtained by the real near-field tests. This method was fast and much adaptable for the large-aperture antenna.
出处 《空间科学学报》 CAS CSCD 北大核心 2013年第1期115-119,共5页 Chinese Journal of Space Science
关键词 光学照相 电大尺寸天线 平面近场测试 Photogrammetry, Big aperture antenna, Near-field testing
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参考文献6

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二级参考文献14

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