Abstract A novel design of dual-band slot antenna with a circular patch for radar applications is presented and studied. It is fed by a micro-strip line and built on a FR-4 substrate with a whole size of 18 X 30 mm2. A dual band printed antenna is created by introducing slots on the radiating element. By this, two bandwidth, covering C and X band, are achieved. In order to obtain a good fundamental antenna design, the initial studies were carried out theoretically, using CST Microwave Studio simulation software. In this case, the frequency range at return loss <10 dB is 5.24–6.16 GHz for low frequency and is 7.9–11.7 GHz for high frequency. In addition, the proposed antenna has good radiation characteristics and stable gains over the whole operating bands. A prototype of antenna is fabricated and tested. Experimental data show good agreement between simulated and measured results.

中文翻译：

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一种用于雷达应用的 S/X 双频带圆形缝隙天线的新设计

摘要 提出并研究了一种用于雷达应用的圆形贴片双频段缝隙天线的新设计。它由微带线供电，并构建在 FR-4 基板上，整体尺寸为 18 X 30 mm2。双频带印刷天线是通过在辐射元件上引入缝隙来创建的。这样，就实现了覆盖 C 和 X 波段的两个带宽。为了获得良好的基本天线设计，使用 CST Microwave Studio 仿真软件从理论上进行了初步研究。在这种情况下，回波损耗 <10 dB 的频率范围对于低频为 5.24–6.16 GHz，对于高频为 7.9–11.7 GHz。此外，所提出的天线在整个工作频段具有良好的辐射特性和稳定的增益。制作并测试了天线原型。