Substrate-integrated-waveguide cavity-backed circularly polarized antenna with enhanced bandwidth and gain

IF 1.3 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

ETRI Journal Pub Date : 2023-11-22 DOI:10.4218/etrij.2023-0029

Shankaragouda M. Patil, Rajeshkumar Venkatesan

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Abstract

We propose a method for increasing the bandwidth of a substrate-integrated-waveguide (SIW) cavity-backed antenna with taper-based microstrip SIW transition feeding. For radio transmission, a circular slot is etched on top of the SIW cavity. For optimal antenna design, the slot is etched slightly away from the cavity center to generate circularly polarized waves. Simulations show a wide axial ratio bandwidth of 7.860% between 11.02 GHz and 11.806 GHz. Experimental results confirm a similar wide axial ratio bandwidth of 4.9% between 10.8 GHz and 11.35 GHz. An SIW feed from an inductive window excites the radiating circular slot, resulting in a simulated wide impedance range of 1.548 GHz (10.338 GHz–11.886 GHz) and bandwidth of 13.93%. Experimental results show a wide impedance of 2.08 GHz (10.2 GHz–12.08 GHz) and bandwidth of 18.84%. The SIW cavity-backed antenna creates a unidirectional pattern, leading to gains of 6.61 dBi and 7.594 dBi in simulations and experiments, respectively. The proposed antenna was fabricated on a Rogers RT/Duroid 5880 substrate, and the reflection coefficient, radiation patterns, and gains were tested and compared using a computer simulator. The developed broadband antenna seems suitable for X-band applications.

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增强带宽和增益的基板集成波导腔背圆极化天线

我们提出了一种利用锥形微带SIW过渡馈电来增加基片集成波导(SIW)腔背天线带宽的方法。对于无线电传输，在SIW腔的顶部蚀刻一个圆形槽。为了优化天线设计，将狭槽蚀刻得稍微远离空腔中心，以产生圆极化波。仿真结果表明，在11.02 GHz和11.806 GHz之间的宽轴比带宽为7.860%。实验结果表明，在10.8 GHz和11.35 GHz之间具有4.9%的宽轴比带宽。电感窗口的SIW馈电激励辐射圆形槽，产生1.548 GHz (10.338 GHz - 11.886 GHz)的模拟宽阻抗范围和13.93%的带宽。实验结果表明，宽阻抗为2.08 GHz (10.2 GHz - 12.08 GHz)，带宽为18.84%。SIW腔背天线产生单向方向图，仿真和实验分别获得6.61 dBi和7.594 dBi增益。在Rogers RT/Duroid 5880衬底上制作了该天线，并在计算机模拟器上测试了反射系数、辐射方向图和增益。所研制的宽带天线似乎适合x波段应用。

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

ETRI Journal 工程技术-电信学

CiteScore

4.00

自引率

7.10%

发文量

审稿时长

6.9 months

期刊介绍： ETRI Journal is an international, peer-reviewed multidisciplinary journal published bimonthly in English. The main focus of the journal is to provide an open forum to exchange innovative ideas and technology in the fields of information, telecommunications, and electronics. Key topics of interest include high-performance computing, big data analytics, cloud computing, multimedia technology, communication networks and services, wireless communications and mobile computing, material and component technology, as well as security. With an international editorial committee and experts from around the world as reviewers, ETRI Journal publishes high-quality research papers on the latest and best developments from the global community.