Compact Series-fed Circularly-polarized Patch Array basedon Microstrip Line

Authors

  • Gengming Wei 1) School of Electronic Engineering Xidian University, Xi’an, 710071, China 2) Global Big Data Technologies Centre University of Technology Sydney, Ultimo, NSW 2007, Australia https://orcid.org/0000-0003-4019-2249
  • Le Chang Shaanxi Key Laboratory of Deep Space Exploration Intelligent Information Technology School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an, 710071, China
  • Yu Wu Apple R&D Beijing, 100022, China

DOI:

https://doi.org/10.13052/2023.ACES.J.381002

Keywords:

Circularly-polarized antenna, microstrip line, microstrip patch antenna, series-fed antenna array

Abstract

A compact single-layer circularly polarized (CP) antenna array is proposed in this paper for 5G/6G applications. The conventional microstrip line is modified as a feeding network by periodically and alternatively loading field blocking stubs, producing a linearly polarized in-phase radiative field aperture. By adding CP corner-truncated patches beside these in-phase fields, a linear high-gain CP antenna array excited by a single feed is obtained. The feasibility of the proposed design is demonstrated through the fabrication and measurement of a 16-element linear array. The results indicate that the 3 dB axial ratio bandwidth is 3.5% (19.60∼20.30 GHz), the -10 dB impedance bandwidth totally covers the 3 dB axial ratio bandwidth, and the peak realized gain is 14.9 dBi under an antenna length of 5.69λ0. This proposed strategy provides a very compact antenna structure to achieve high-gain CP radiation without the requirement of impedance transformers, phase shifters, and open-stop-band suppressing measures. Moreover, the antenna has a per-unit-length CP gain of 5.5/λ0, which is superior to many single-layer high-gain CPantennas.

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Author Biographies

Gengming Wei, 1) School of Electronic Engineering Xidian University, Xi’an, 710071, China 2) Global Big Data Technologies Centre University of Technology Sydney, Ultimo, NSW 2007, Australia

Gengming Wei received the B.S. degree from Xidian University, Xi’an, China, in 2012. He is currently pursuing the collaborative Ph.D. degree between Xidian University and the University of Technology Sydney, Sydney, NSW, Australia. His research interests include UWB antennas, high-gain antennas with low profile, wireless power transfer systems, and antenna measurement systems.

Le Chang, Shaanxi Key Laboratory of Deep Space Exploration Intelligent Information Technology School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an, 710071, China

Le Chang received the B.S. degree in electronics and information engineering from Xidian University, Xi’an, China, in 2012, and the Ph.D. degree in electrical engineering from Tsinghua University, Beijing, China, in 2017. In July 2017, he joined Huawei Technology Ltd., Beijing, China, as a senior antenna engineer. Since 2021, he has been with Xi’an Jiaotong University, where he is currently an associate professor. He has authored or co-authored over 34 journal articles. His current research interests include mobile antennas and mmW/THzantennas.

Yu Wu, Apple R&D Beijing, 100022, China

Yu Wu received the M.S. degree in electronics and information engineering from Xidian University, Xi’an, China, in 2016.

He is currently a senior engineer with Apple R&D, Beijing, China. His current research interests include mobile antennas, mobile device signal measurements in all kinds of scenarios.

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Published

2023-10-31

How to Cite

[1]
G. Wei, L. Chang, and Y. Wu, “Compact Series-fed Circularly-polarized Patch Array basedon Microstrip Line”, ACES Journal, vol. 38, no. 10, pp. 761–766, Oct. 2023.

Issue

2023: Vol 38 Iss 10

Section

Mode-inspired antennas/circuits for 5G/6G applications

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