ABSTRACT In this work, a low radar cross-section (RCS) dual-band with one band circularly polarised (CP) slot antenna consisting of an L-shaped metallic strip along with a combination of Split Ring Resonator (SRR) and complementary SRR (CSRR) is proposed. In the dual-band, one wideband operation is obtained by creating a wide slot in the ground plane of the antenna and a narrow band is achieved by loading the antenna with a combination of SRR-CSRR. The proposed antenna achieves impedance bandwidth of 1.5 to 3.26 GHz and 3.6 to 4.1 GHz. The proposed design has 3-dB axial ratio bandwidth (ARBW) of 2.5 to 3 GHz and the peak gain of the antenna is 4.2 and 3.3 dBi in the respective bands. The proposed antenna exhibits significant RCS reduction in the wideband of 4.7 to 18 GHz and peak RCS reduction of 26 dB is achieved at 11.3 GHz. Also, the sense of polarisation of the proposed antenna can be changed by 90° rotating the L-shaped metallic strip with reference to the slot in the ground plane.

中文翻译：

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一种负载 SRR 和 CSRR 的低 RCS 紧凑圆极化双频带缝隙天线，用于卫星应用

摘要 在这项工作中，一种低雷达截面 (RCS) 双频段具有一个频段圆极化 (CP) 缝隙天线，由 L 形金属条以及裂环谐振器 (SRR) 和互补 SRR 组成。 CSRR) 提出。在双频段中，通过在天线的接地平面中创建一个宽槽来获得一个宽带操作，而通过用 SRR-CSRR 的组合加载天线来实现窄带。建议的天线实现了 1.5 至 3.26 GHz 和 3.6 至 4.1 GHz 的阻抗带宽。建议的设计具有 2.5 至 3 GHz 的 3 dB 轴比带宽 (ARBW)，并且天线的峰值增益在相应频段中分别为 4.2 和 3.3 dBi。所提议的天线在 4.7 至 18 GHz 的宽带中表现出显着的 RCS 降低，并且在 11.3 GHz 处实现了 26 dB 的峰值 RCS 降低。还，