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引用次数: 0
摘要
本研究在特征模态分析（CMA）框架内研究了基于高阻抗面（HIS）的弓形天线设计，并提出了高阶模态抑制方法。设计了一种工作频率范围为 1.6-6 GHz 的三角椭圆弓形天线。利用 CMA 确定了所提天线的辐射模式和高阶模式，并使用 HIS 结构来增强所需的模式和抑制高阶模式，从而获得高增益、良好的前后比（FBR）和稳定的辐射特性。最终设计的基于 HIS 的弓形天线在 1.7 至 5.5 GHz 范围内具有稳定的辐射模式，最大孔径增益为 10.5 dB。此外，在工作带宽内还获得了 6.5 至 12 dB 的增益和 8 至 18 dB 的 FBR。所提出的天线具有低剖面、宽带和高孔径增益等优点，适合地面穿透雷达应用。
Modal analysis and higher order mode suppression of a high impedance surface-based bowtie antenna
The present work studies the design of a high impedance surface (HIS)-based bowtie antenna in the framework of characteristic mode analysis (CMA) and proposes the method of higher order mode suppression. A triangular-elliptical bowtie antenna operating in the frequency range of 1.6–6 GHz is designed. The radiating and higher order modes of the proposed antenna are identified using CMA, and an HIS structure is used to enhance the desired mode and to suppress the higher order mode in order to get high gain, good front-to-back ratio (FBR), and stable radiation characteristics. The final designed HIS-based bowtie antenna gives stable radiation patterns from 1.7 to 5.5 GHz with a maximum boresight gain of 10.5 dB. Also, gain from 6.5 to 12 dB and FBR from 8 to 18 dB are obtained in the operating bandwidth. The proposed antenna features the advantages of low profile, wideband and high boresight gain making it suitable for ground-penetrating radar applications.
期刊介绍：
The prime objective of the International Journal of Microwave and Wireless Technologies is to enhance the communication between microwave engineers throughout the world. It is therefore interdisciplinary and application oriented, providing a platform for the microwave industry. Coverage includes: applied electromagnetic field theory (antennas, transmission lines and waveguides), components (passive structures and semiconductor device technologies), analogue and mixed-signal circuits, systems, optical-microwave interactions, electromagnetic compatibility, industrial applications, biological effects and medical applications.
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