The radiation characteristics of the microstrip antenna (MSA) on the frequency selective surface (FSS) based absorbing layer is presented in this paper. It is observed that an absorbing layer placed between the MSA configuration and the ground plane helps in controlling the radiation characteristics of the antenna. It not only reduces the back lobe but also reduces the beamwidth and gain of the antenna simultaneously. This is because the absorbing layer absorbs some amount of power radiated by the antenna in both forward and backward directions. The proposed design is simulated using Ansys HFSS electromagnetic simulation software and the results are validated by comparing it with the results obtained from the equivalent circuit approach as well as experimental results. The effect of absorber on radiation characteristics of the radiator demonstrates its potential use in suppressing the radiation from the printed circuit board traces.

中文翻译：

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频率选择表面吸收层上微带天线的辐射特性

本文介绍了基于频率选择表面（FSS）的吸收层上的微带天线（MSA）的辐射特性。据观察，放置在 MSA 配置和接地平面之间的吸收层有助于控制天线的辐射特性。它不仅减小了后瓣，而且同时减小了天线的波束宽度和增益。这是因为吸收层吸收了天线在前后方向上辐射的一些功率。所提出的设计使用 Ansys HFSS 电磁仿真软件进行仿真，并通过将其与从等效电路方法获得的结果以及实验结果进行比较来验证结果。