Compact and High-Efficient Air-Filled Substrate Integrated Waveguide Broadband Endfire Leaky Wave Antenna

IF 4.6 1区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Antennas and Propagation Pub Date : 2024-09-30 DOI:10.1109/TAP.2024.3466392

Junjiang Chen;Jinlong Su;Fei Hu

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引用次数: 0

Abstract

The air-filled substrate integrated waveguide (AFSIW) millimeter wave (MMW) broadband endfire leaky wave antenna (LWA) with compact and high efficiency is proposed in this communication. The antenna mainly includes a three-layer substrate. The first and third layers are the radiation main body, and the second layer is an AFSIW transmission line (TL). First, the AFSIW with air reduces the dielectric losses, thus improving the radiation efficiency of the antenna. Second, the AFSIW has weak dispersion characteristics, benefiting the wide operating bandwidth of the antenna. Additionally, a double-sided diamond-shaped slot exhibits a flatter phase constant in the slow wave region, further enhancing the antenna’s operating bandwidth. The electromagnetic energy of the AFSIW endfire LWA 1 is concentrated on the metal layer surface through a single diamond-shaped slot array, achieving endfire radiation along the waveguide structure. By utilizing the confinement of the dielectric layer on the field, the gain of the antenna is further improved. Finally, the AFSIW endfire LWA 2 utilizes multiple diamond-shaped slots as the unit cell, increasing the unit cell’s attenuation constant and further enhancing the radiation efficiency of the antenna. The prototypes of LWA are fabricated and tested. The measurement results show that the impedance bandwidth of LWA 2 is 29–42 GHz. The maximum radiation efficiency of LWA 2 is 90.3%.

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紧凑高效的充气基板集成波导宽带端火漏波天线

提出了一种结构紧凑、效率高的充气基板集成波导（AFSIW）毫米波宽带端漏波天线。天线主要包括三层基板。第一层和第三层是辐射主体，第二层是AFSIW传输线（TL）。首先，带空气的AFSIW降低了介质损耗，从而提高了天线的辐射效率。其次，AFSIW具有弱色散特性，有利于天线的宽工作带宽。此外，双面菱形槽在慢波区域具有更平坦的相位常数，进一步提高了天线的工作带宽。AFSIW端火LWA 1的电磁能量通过单个菱形槽阵集中在金属层表面，实现沿波导结构的端火辐射。利用介质层对电场的约束，进一步提高了天线的增益。最后，AFSIW端火LWA 2采用多个菱形槽作为单元格，提高了单元格的衰减常数，进一步提高了天线的辐射效率。制作了LWA的原型并进行了测试。测量结果表明，lwa2的阻抗带宽为29 ~ 42 GHz。lwa2的最大辐射效率为90.3%。

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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来源期刊

IEEE Transactions on Antennas and Propagation 工程技术-电信学

CiteScore

10.40

自引率

28.10%

发文量

968

审稿时长

4.7 months

期刊介绍： IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas, including design and development, and in the propagation of electromagnetic waves, including scattering, diffraction, and interaction with continuous media; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques