Decoupling of Wideband Closely-Spaced Patch Antennas for MIMO Applications

Zijian Shao, Lina Ma, Changzhan Gu, Kaushik Sengupta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A simple decoupling technique based on a single-layer substrate is proposed for wideband closely-spaced patch antennas. By combining the coplanar decoupling structure (CDS) and defected ground structure (DGS), the strong coupling between wideband closely-spaced patch antennas can be significantly suppressed across the operating band without an additional substrate layer. To validate the feasibility of the proposed decoupling schemes, two decoupled wideband antenna prototypes with microstrip and probe gap-coupled feeding are designed, simulated, and measured at ISM and X band, respectively. Experimental results show that the H-plane decoupled prototype achieves over 15 dB isolation across a wide matched bandwidth of 18.4% with an edge-to-edge separation of 0.038 λ0 and the E-plane decoupled prototype achieves beyond 20 dB isolation across a wide matched bandwidth of 22.2% with an edge-to-edge separation of 0.033 λ0. Featuring a compact appearance, wideband operation, and strong-coupling suppression, the proposed decoupling technique is promising in wideband multiple-input and multiple-out (MIMO) applications.

Original languageEnglish (US)
Title of host publication2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2023 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1457-1458
Number of pages2
ISBN (Electronic)9781665442282
DOIs
StatePublished - 2023
Event2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2023 - Portland, United States
Duration: Jul 23 2023Jul 28 2023

Publication series

NameIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
Volume2023-July
ISSN (Print)1522-3965

Conference

Conference2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2023
Country/TerritoryUnited States
CityPortland
Period7/23/237/28/23

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Microstrip antennas
  • antenna decoupling
  • multiple-input and multiple-out (MIMO)
  • wideband antennas

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