A Simple-Topology Compact Broadband Circularly Polarized Antenna With Unidirectional Radiation Pattern

Ubaid Ullah; Sławomir Kozieł; Ismail Mabrouk

doi:10.1109/lawp.2019.2945543

A Simple-Topology Compact Broadband Circularly Polarized Antenna With Unidirectional Radiation Pattern

Abstract

In this letter, a geometrically simple, reflector-backed single-point-fed circularly polarized (CP) antenna with unidirectional radiation pattern is presented. The structure comprises a simple coplanar waveguide (CPW) feeding circuit with an open slot etched on one side of the coplanar ground. The enhanced CP bandwidth is obtained by combining the loop mode, the slot mode, and the asymmetrical configuration of the coplanar ground planes along the feed line. All parameters are optimized at the full-wave level of description for the best impedance and axial ratio (AR) bandwidth. The antenna footprint is only 0.35 λo×0.39 λo at the lowest CP operating frequency of 3.1 GHz. The measurement results indicate 82% impedance bandwidth (from 3 GHz to 7.2 GHz), and 80% AR bandwidth (from 3.1 GHz to 7.2 GHz). A unidirectional right-hand circular polarization (RHCP) radiation pattern in the +z-direction is also achieved by adding a reflector. The peak realized gain of the antenna is 6.7 dBic, and the peak radiation efficiency is 98%.

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Authors (3)

Ubaid Ullah
- Al Ain University of Science and Technology
Sławomir Kozieł prof. dr inż.
Ismail Mabrouk
- Al Ain University of Science and Technology

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Publication version: Accepted or Published Version
License: Copyright (2019 IEEE)

Keywords

WIDEBAND ANTENNAS , COMPACT ANTENNAS , WIDE SLOT ANTENNA , EM-DRIVEN DESIGN , CIRCULARLY POLARIZED ANTENNA

Details

Category:: Articles
Type:: artykuły w czasopismach
Published in:: IEEE Antennas and Wireless Propagation Letters no. 18, pages 2612 - 2616,
ISSN: 1536-1225
Language:: English
Publication year:: 2019
Bibliographic description:: Ullah U., Kozieł S., Mabrouk I.: A Simple-Topology Compact Broadband Circularly Polarized Antenna With Unidirectional Radiation Pattern// IEEE Antennas and Wireless Propagation Letters -Vol. 18,iss. 12 (2019), s.2612-2616
DOI:: Digital Object Identifier (open in new tab) 10.1109/lawp.2019.2945543
Verified by:: Gdańsk University of Technology