波束折射模型在天线罩补偿中的应用

doi:10.12305/j.issn.1001-506X.2021.12.07

摘要/Abstract

摘要：

导引头天线罩的流线型结构对天线阵列造成了能量损失、角度检测误差等电磁性能方面的影响, 给制导性能带来严重损失。本文利用电磁波折射理论建立了波束指向偏移模型, 通过数学公式推导验证了该模型的合理性, 为角度检测误差补偿提供了理论基础。波束偏移理论和相控阵天线阵列测角原理的结合定位了阵列在有天线罩时检测角所对应的最大波束指向角度, 提升了相对于无天线罩时检测角误差的准确性。实验数据表明，所提方法所得到的误差角度补偿表将阵列角度检测误差从1°降低到可接受的0.1°以下的误差范围, 验证了该方法的创新性和先进性。

关键词: 相控阵, 天线罩, 波束指向偏移, 测角误差, 角度补偿

Abstract:

The streamlined structure of the seeker radome has an impact on the electromagnetic performance of antenna array, such as energy loss and angle detection errors, and brings serious loss to the guidance performance. This paper uses the electromagnetic wave refraction theory to establish a beam pointing offset model, and verifies the rationality of the model through mathematical formula deduction, which provides a theoretical basis for angle detection error compensation. The combination of the beam offset theory and the phased array antenna array angle measurement principle locates the maximum beam pointing angle corresponding to the detection angle of the array when there is a radome, and improves the accuracy of the detection angle error when compared to that when there is no radome. Experimental data show that the error angle compensation table obtained by the proposed method reduces the array angle detection error from 1° to an acceptable error range below 0.1°, which verifies the innovation and advancement of the method.

Key words: phased array, radome, beam pointing deviation, angle measurement error, angle compensation

中图分类号:

TN958.92

马小梦, 何岷, 毕建权. 波束折射模型在天线罩补偿中的应用[J]. 系统工程与电子技术, 2021, 43(12): 3470-3477.

Xiaomeng MA, Min HE, Jianquan BI. Application of beam refraction model in radome compensation[J]. Systems Engineering and Electronics, 2021, 43(12): 3470-3477.

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补偿状态	误差均值		误差方差
补偿状态	方位向	俯仰向	方位向	俯仰向
补偿前/(°)	-0.703	0.43	0.001 3	0.012 7
补偿后/(°)	-0.045	0.038	5×10^-7	1.7×10^-5

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