Computation of the average power pattern of a reflector antenna with random surface errors and misalignment errors

Abstract

Abstruct-To specify manufacturing tolerances of a reflector antenna, various errors such as random surface errors and misalignment errors must be considered at one time because superposition of the effects of those errors may not hold. In this paper, based on the RahmatSamii's formulation [l], a method for computing efficiently the average power pattern of a reflector antenna with those errors is presented. Simulation results show that superposition of the effects of errors does not generally hold and demonstrate how those errors degrade the peak-gain and sidelobe levels.

Analysis of Aperture Phase Errors Using Interval Method

“…In Fig. 2, the aperture plane is divided into N annular regions which are further subdivided into n K zones in the n th region [15], then the phase error of each zone may be expressed as As the surface errors are intervals, the aperture phase errors are also intervals from Eq.22. Moreover, the surface distortion errors are obtained by interpolating or fitting.…”

A Hybrid Tolerance Design Method for the Active Phased-Array Antenna

“…Based on a series of experiments, Ruze [6] summarized the empirical formula that describes the empirical relation between the root mean square (RMS) of the array element errors and the gain degradation. Following Ruze's work, the empirical function between the RMS and the sidelobes degradation was determined [7][8][9].…”

A review of full-path electromechanical coupling modeling and compensation for reflector antennas

“…该模型将孔径平面划分成同心圆环, 每个圆环又划分成子区域, 并将每个子区域上的误差 视为相互独立且服从同样的高斯分布. 此后, 大量研 究工作基于Rahmat-Samii的模型展开 [7][8][9] , 包括表面随 机误差与旁瓣电平之间的概率关系研究, 随机表面误 差对波束效率的影响研究, 随机误差与相位不匹配误 差对天线性能的影响研究等. Sinton等人 [10] 和Liu等 人 [11] 采用概率统计方法, 分别研究了表面随机误差对 偏置柱面天线和偏置卡塞格伦天线的电性能的影响.…”