西安电子科技大学学报

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无相位近场天线测量技术

尚军平;左炎春;胡永浩;王媛;宋康   

  1. (西安电子科技大学 天线与微波技术重点实验室,陕西 西安 710071)
  • 收稿日期:2016-03-18 出版日期:2017-04-20 发布日期:2017-05-26
  • 作者简介:尚军平(1964-),男,高级工程师,E-mail:jpshang@mail.xidian.edu.cn

Research on phaseless near-field antenna measurement

SHANG Junping;ZUO Yanchun;HU Yonghao;WANG Yuan;SONG Kang   

  1. (Science and Technology on Antennas and Microwave Lab., Xidian Univ., Xi'an 710071, China)
  • Received:2016-03-18 Online:2017-04-20 Published:2017-05-26

摘要:

研究了利用天线近场幅度信息重构天线远场特性的无相位近场测量方法.该方法使用线极化探头在被测天线近场区两平行平面上采集场的幅度数据,通过迭代傅里叶变换算法复原一采样面上各采样点场的相位数据,然后通过近远场变换得到被测天线的远场特性.通过理论研究和仿真实验表明,无相位近场天线测量技术可有效地重构天线远场,同时,合理地选择迭代初始相位将有助于提高算法的收敛速度和精度.

关键词: 无相位测量, 相位还原, 迭代傅里叶变换算法, 近场测量

Abstract:

A method of phaseless near-field measurement is studied which can reconstruct the far-field characteristics of the antenna by analyzing the near-field amplitude-only data. The method includes a dual-plane scanning strategy which lets the linear polarization probe collect the amplitude-only data on the two scanning planes respectively. The phase of each sampling points at one of the scanning planes can be retrieved using the iterative fourier transform algorithm. Then the far-field properties of the antenna are obtained by applying the near-field/far-field transformation technique. Theoretical research and simulations show that the phaseless near-field measurement strategy can reconstruct the far-field pattern effectively and that a better choice of the initial iterate phase can help to improve the convergence rate and the convergence precision of the method.

Key words: phaseless measurement, phase reconstruction, iterative Fourier transform algorithm, near-field measurement