基于柱面波展开的准远场快速测量方法研究

A Study on Fast Quasi-far-field Measurement Method Based on Cylindrical Wave Expansion

为解决常规暗室环境不满足大口径天线的测量需求、测试系统复杂以及测试效率低等问题,文中对天线测量中的高效测量方法进行了研究,重点研究了准远场快速测量方法,提出了一种基于柱面波展开理论的准远场变换算法。该算法适宜在准远场距离下对一维电尺寸大而另一维电尺寸小的天线进行测量,提高了此类天线的测试效率和现有暗室的测试能力。为了验证所提出的方法,利用电磁仿真软件设计了三个均匀分布的线性阵列。仿真和实物测试结果验证了所提出方法的正确性。

In order to solve the problems that the conventional anechoic chamber environment can not meet the requirements of the large aperture antenna measurement,the problem of complex test system and low test efficiency,in this paper the high-efficiency measurement method for antenna measurement is studied,and the fast measurement of quasi-far-field(QFF)is mainly studied.A QFF transformation algorithm based on cylindrical wave expansion theory is proposed.The proposed algorithm is suitable for measuring antennas with large electrical size in one dimension and small electrical size in other dimension at QFF distance,improves the testing efficiency of such antennas and improves the testing capability of the existing anechoic chamber,respectively.To validate the proposed method,three uniformly distributed linear arrays are designed by electromagnetic simulation software.It is found that the simulation and test results verify the correctness of the proposed method.