A Wavetrap-Based Decoupling Technique for 45°-Polarized MIMO Antenna Arrays

Research output: Contribution to journalJournal articleResearchpeer-review

70 Downloads (Pure)

Abstract

A decoupling method using wavetrap technique for large-scale multiple-input multiple-output (MIMO) antenna arrays consisting of 45° polarized patch antennas is presented and studied in this article. To achieve high isolation responses among the array elements, simple wavetrap structures are proposed and positioned around every single patch element. With the presented decoupling scheme, the strong mutual coupling between both adjacent and nonadjacent patch elements is suppressed to a low level. Theoretical and numerical studies are carried out to verify the decoupling performance of the proposed architecture. For demonstration purposes, two practical examples of 1 \times 8 and 4 \times 2\,\,45^{\circ } polarized arrays centered at 4.9 GHz are developed, fabricated, and measured. The results indicate that all mutual couplings among the arrays are significantly suppressed to almost less than -25 dB from 4.8 to 5.0 GHz, with a small insertion loss of around 0.7 dB, making the proposed decoupling scheme attractive and valuable for phased array and massive MIMO systems.

Original languageEnglish
Article number8883214
JournalIEEE Transactions on Antennas and Propagation
Volume68
Issue number3
Pages (from-to) 2148-2157
Number of pages10
ISSN0018-926X
DOIs
Publication statusPublished - Mar 2020

Keywords

  • MIMO
  • Massive multiple-input and multiple-output (MIMO)
  • phased array
  • wavetrap
  • wideband decoupling

Fingerprint Dive into the research topics of 'A Wavetrap-Based Decoupling Technique for 45°-Polarized MIMO Antenna Arrays'. Together they form a unique fingerprint.

  • Cite this