A Pin-Loaded Self-Decoupling Method for MIMO Patch Antenna Array Based on Fringing-Field Reshaping

doi:10.1109/LAWP.2024.3405951

A Pin-Loaded Self-Decoupling Method for MIMO Patch Antenna Array Based on Fringing-Field Reshaping

2024-12-01

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DOI：10.1109/LAWP.2024.3405951

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In this letter, a novel pin-loaded self-decoupling method is proposed based on the fringing-field reshaping of the TM11-mode circular patch antenna. At first, the primary cause of coupling is demonstrated to be attributed to the fringing field of the radiating patch, and the conventional antenna pair under the E-plane array arrangement always suffers from strong electric coupling, leading to poor isolation. Then, a shorting pin is strategically loaded to the coupling edge of each patch, by which the initial strong electric field density is strategically redistributed to be a local minimum, contributing to the significant isolation improvement. Furthermore, a prototype of the highly-isolated antenna pair is manufactured and measured. The results illustrate the achievement of high isolation over 20 dB and remained symmetric broadside radiation pattern. Finally, the proposed method is respectively demonstrated on the multiple-input--multiple-output (MIMO) arrays with more radiators and asymmetrical configuration, showcasing its efficacy for versatile decoupling.

Keywords:

cross-band decoup- ling

fringing-field reshaping

Asymmetrical configuration

cross-band decoup- ling

mutual coupling reduction

pin loading

multiple-input-multiple-output (MIMO) patch antenna array

mutual coupling reduction

pin loading

A Pin-Loaded Self-Decoupling Method for MIMO Patch Antenna Array Based on Fringing-Field Reshaping

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