一种机载C波段天线RCS减缩设计

A Kind of RCS Reduction Design on Airborne C-Band Antenna

摘要: 提出了一种减缩机载C波段微带天线雷达散射截面(RCS)的设计，该方法基于对微带天线散射来源的分析，给出一种贴片修型及减缩贴片面积的设计思路。在常规矩形贴片天线的基础上，运用该思路设计了一种优化后的单元贴片。通过对比该天线与常规矩形贴片天线的区别，探究了减缩贴片面积减少散射设计思路的可行性。使用该方法后，在L-Ku频段范围内，在φ = −30˚~30˚角域范围内的RCS平均值缩减了接近10 dB，验证了该设计方法的有效性。

Abstract: A design method is proposed to reduce the Radar Cross Section (RCS) of airborne C-band microstrip antennas. Based on an analysis of the scattering sources of microstrip antennas, this design concept focuses on patter modification and area reduction. Building on a conventional rectangular patch antenna, this concept is used to design an optimized unit patch. By comparing the differences between this antenna and the conventional rectangular patch antenna, the feasibility of the scattering reduction design approach based on patch area reduction is investigated. With this method, the average RCS value in the φ = −30˚ to 30˚ angular range is reduced by nearly 10 dB across the L-Ku band, verifying the effectiveness of the proposed design method.