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Loading metamaterial perfect absorber method for in-band radar cross section reduction based on the surface current distribution of array antennas

机译：基于阵列天线表面电流分布的带内雷达截面减小载荷超材料完美吸收体方法

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摘要

A loading metamaterial perfect absorber (MPA) method is proposed to reduce the in-band radar cross section (RCS) and preserve the radiation characters for the guidewave slot array antennas in this study. The surface current distributions of the array antennas are divided into the strong current area and the weak current area. The metal surface with the strong current is retained to avoid the radiation deterioration, and the MPA is only loaded on the weak current area by the three layers MPA for RCS reduction. The RCS of a 1 × 10 guidewave slot array antennas is reduced using the method. Simulated , radiation patterns, gain and RCS reduction of the array antennas are compared with measured results. Experimental results indicated that the in-band RCS of the array antennas loading the MPA has dramatically reduced with only about 0.73 dB gain reduction and the RCS reduction are not significant in out-of-band while the radiation characters is unchanged. The experimental results are in good agreement with the numerical simulations.
机译：本文提出了一种加载超材料完美吸收体（MPA）方法，以减小带内雷达截面（RCS）并保留导波缝隙阵列天线的辐射特性。阵列天线的表面电流分布分为强电流区域和弱电流区域。保留具有强电流的金属表面以避免辐射恶化，并且仅通过三层MPA将MPA加载到弱电流区域上，以降低RCS。使用该方法可以减少1×10波导缝隙阵列天线的RCS。将阵列天线的仿真辐射图，增益和RCS降低与测量结果进行比较。实验结果表明，加载MPA的阵列天线的带内RCS显着降低，增益降低仅约0.73 dB，并且带外RCS降低在辐射特性不变的情况下并不明显。实验结果与数值模拟吻合良好。

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