A Wideband Single-fed circularly polarized dielectric resonator antenna with bandpass filtering response

IF 0.6 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Electromagnetics Pub Date : 2022-08-18 DOI:10.1080/02726343.2022.2140922

Weihua Luo, Yulu Feng, Yi Ren, Min Wang

引用次数: 0

Abstract

ABSTRACT For integrated design of a filter and an antenna, a wideband circularly polarized (CP) dielectric resonator antenna (DRA) with filtering characteristics is proposed. A rectangular slot structure is etched on the ground to optimize the axial ratio (AR) bandwidth of the antenna singly fed by one port. Capacitive filtering branches are combined into the microstrip feeding line to effectively generate two radiation nulls outside the passband. To further enhance the suppression level in the high-frequency stopband, the stair-shaped DR is chamfered into a fish-shaped structure. A suppression level larger than 15 dB is found within the stopband. A prototype of the antenna is fabricated, and both of the simulated and measured results show a wide bandpass filtering performance over the operating frequency band. The antenna has an impedance bandwidth of 37.8%, an AR bandwidth of 25.1%, and a low profile of 0.078λ 0 (λ 0 is the free-space wavelength at 5.47 GHz), which can be a good candidate for 5 G and WLAN communication systems.

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具有带通滤波响应的宽带单馈圆极化介质谐振天线

摘要为了实现滤波器和天线的集成设计，提出了一种具有滤波特性的宽带圆极化介质谐振器天线。在地面上蚀刻矩形槽结构，以优化单端口单馈天线的轴比（AR）带宽。将电容滤波支路组合到微带馈线中，有效地在通带外产生两个辐射零点。为了进一步提高高频阻带中的抑制水平，将阶梯形DR斜切为鱼形结构。在阻带内发现大于15dB的抑制电平。制作了该天线的原型，仿真和测量结果表明，该天线在工作频带上具有宽频带滤波性能。该天线的阻抗带宽为37.8%，AR带宽为25.1%，低轮廓为0.078λ0（λ0是5.47 GHz的自由空间波长），是5G和WLAN通信系统的良好候选者。

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

Electromagnetics 工程技术-工程：电子与电气

CiteScore

1.60

自引率

12.50%

发文量

审稿时长

6 months

期刊介绍： Publishing eight times per year, Electromagnetics offers refereed papers that span the entire broad field of electromagnetics and serves as an exceptional reference source of permanent archival value. Included in this wide ranging scope of materials are developments in electromagnetic theory, high frequency techniques, antennas and randomes, arrays, numerical techniques, scattering and diffraction, materials, and printed circuits. The journal also serves as a forum for deliberations on innovations in the field. Additionally, special issues give more in-depth coverage to topics of immediate importance. All submitted manuscripts are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. Submissions can be made via email or postal mail.