RCS Reduction of Reflectarray Antenna Backed with Sub-Wavelength Frequency Selective Surface

2019 27th Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2019-04-01 DOI:10.1109/IranianCEE.2019.8786747

J. Nourinia, C. Ghobadi, B. Mohammadi, Abdelhady Mahmoud, I. Aryanian

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引用次数: 3

Abstract

A reflectarray antenna (RA) with a novel sub-wavelength-frequency selective surface (FSS) is introduced as a ground plane. The unit element consists of two concentric circular rings, where the width of the outer ring is constant and the width of the inner ring varies. The proposed multi-resonance sub-wavelength element has a linear reflection phase and improved element loss, which results in increased bandwidth and improved aperture efficiency. The triple-connected C-shaped resonator as FSS is used in each unit element instead of the ground plane, so that it is reflective in the frequency range of 9.42-12.55GHz and is transparent outside the working frequency band of the antenna. The reflective and pattern characteristics of the unit elements with the solid-metal and FSS ground planes are compared with each other. The proposed FSS-backed RA has a peak gain of 26.26dBi at 10GHz with a 42.87% aperture efficiency and 15.4% 1dB gain bandwidth. The gain of RA with the FSS ground plane is 0.3 dB lower than the RA with a solid-metal ground plane, while their 1dB gain bandwidth is almost equal.

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基于亚波长频率选择表面的反射天线RCS降低

介绍了一种以新型亚波长频率选择面(FSS)作为接地面的反射天线。单位元由两个同心圆环组成，其中外环的宽度恒定，内环的宽度变化。所提出的多共振亚波长元件具有线性反射相位，改善了元件损耗，从而增加了带宽，提高了孔径效率。作为FSS的三连接c形谐振器在每个单元元件中使用，而不是接地平面，因此在9.42-12.55GHz频率范围内反射，在天线工作频带之外是透明的。比较了固体金属地平面和FSS地平面的单元元件的反射特性和方向图特性。fss支持的RA在10GHz时的峰值增益为26.26dBi，孔径效率为42.87%，1dB增益带宽为15.4%。FSS接平面的RA增益比固体金属接平面的RA增益低0.3 dB，而两者的1dB增益带宽几乎相等。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 27th Iranian Conference on Electrical Engineering (ICEE)

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