摘要
本文讨论了利用直角平面扫描近场振幅数据重建远场的理论及计算方法。提出了提高精度和节省计算时间的数据处理方法。用典型问题检验了理论和计算机软件的可行性。研究表明,当两个测量面之间的距离足够大时,不需要任何相位信息就可以重建远场,增加一定的附加信息,可以减少两个测量面之间的距离、提高收敛速度和计算精度。应用这一技术,使得只具有振幅测量设备的一般实验室也有可能利用近场扫描技术进行天线和目标特性的测量。
In this paper, the theory and numerical techniques of reconstruction of far-field from only near-field amplitude are investigated. The efficient data processing method to achieve a high degree of accuracy in transformation and to reduce the computer time are developed The numerical examples of rectangular planar scanning are given to validate the effectiveness of the theory and computer software, which shows that the need of any information on the near field phase is allowed to relax provided that the distance between the measurement surfaces is large enough. Increasing the information about the nearfield phase of the radiating system, the distance between the two surfaces can be reduced and at the same time, the convergence rate and computer accuracy can be improved. The application of the technique presented in this paper makes the ordinary laboratories only with amplitude measurement instruments could measure the characteristics of antennas and objects by using near field scanning technique.
出处
《武汉大学学报（自然科学版）》
CSCD
1992年第1期41-49,共9页
Journal of Wuhan University(Natural Science Edition)
基金
国家自然科学基金
关键词
直角平面扫描
近场振幅
远场重建
far-field reconstruction, rectangular planar scanning, amplitude data of near-field, iterative method, antenna measurement
