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A Method to Design Compact MIMO Patch Antenna Using Self-Isolated Technique.

Noi Truong-Quang¹, Tan Dao-Duc¹, Phuong Kim-Thi²

¹Faculty of Electrical and Electronic Engineering, Phenikaa University, Yen Nghia, Ha Dong, Hanoi 12116, Vietnam.

Sensors (Basel, Switzerland)

|April 12, 2025

Summary

This summary is machine-generated.

This study introduces a novel compact high-gain multiple-input, multiple-output (MIMO) patch antenna design. The method uses self-decoupled patches to achieve small element spacing and high isolation, enhancing antenna performance.

Keywords:

MIMO compact patch self-isolated

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Area of Science:

Electrical Engineering
Antenna Theory
Wireless Communication

Background:

Conventional large-scale multiple-input, multiple-output (MIMO) antenna arrays often suffer from increased size due to multiple patches and decoupling networks.
Achieving high isolation between closely spaced antenna elements is a significant challenge in compact array design.

Purpose of the Study:

To propose a design methodology for a compact, high-gain MIMO patch antenna.
To enable extremely small element spacing in MIMO arrays while maintaining high isolation.
To enhance antenna gain and bandwidth through innovative element and feeding network design.

Main Methods:

Utilizing compact self-decoupled patches to reduce element spacing and improve isolation.
Employing a combination of multiple patches and T-junction dividers for gain and bandwidth enhancement.
Validating the design concept through the measurement of a two-element MIMO antenna prototype.

Main Results:

Demonstrated good operational characteristics at 4.8 GHz with element spacing as small as 0.008λ.
Achieved an operating bandwidth of approximately 5%.
Obtained isolation levels better than 19 dB and a maximum broadside gain of 7.2 dBi.

Conclusions:

The proposed self-decoupled patch antenna design effectively addresses the size limitations of conventional MIMO arrays.
The T-junction divider approach successfully enhances gain and bandwidth while maintaining isolation.
The validated design offers a promising solution for compact, high-performance MIMO antenna systems.