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Related Experiment Video

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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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Published on: December 27, 2012

Design of a Compact Multiband Monopole Antenna with MIMO Mutual Coupling Reduction.

Chang-Keng Lin¹, Ding-Bing Lin¹, Han-Chang Lin¹

¹Department of Electronic and Computer Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.

Sensors (Basel, Switzerland)

|September 14, 2024

Summary

Researchers designed a compact multiband antenna for Wi-Fi and sub-6G bands. Meander slits on the ground structure effectively reduced mutual coupling, enhancing performance for IoT and Wi-Fi systems.

Keywords:

IoT MIMO Wi-Fi monopole antenna multiband mutual coupling mutual coupling suppression

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Area of Science:

Electrical Engineering
Electromagnetics
Antenna Theory

Background:

Modern wireless communication systems require compact antennas capable of operating across multiple frequency bands, including Wi-Fi and sub-6 GHz.
Mutual coupling between antenna elements in multi-antenna systems degrades overall performance, necessitating effective suppression techniques.

Purpose of the Study:

To design and validate a compact multiband monopole antenna for Wi-Fi (2.4 GHz) and sub-6 GHz (3.5 GHz, 5-6 GHz) bands.
To investigate and demonstrate a novel method for reducing mutual coupling between antenna elements using defected ground structures (DGS).

Main Methods:

A compact multiband monopole antenna with dimensions 30 × 10 × 1.6 mm³ was designed.
Two meander slits were introduced on the common ground, acting as a DGS, to suppress mutual coupling between antenna elements.
Simulations and measurements were performed to evaluate antenna performance, including isolation and multiband characteristics.

Main Results:

The proposed antenna operates effectively across the targeted 2.4 GHz, 3.5 GHz, and 5-6 GHz bands.
Mutual coupling was significantly suppressed from -6.5 dB and -9 dB to -26 dB and -13 dB at 2.46 GHz and 3.47 GHz, respectively.
Simulated and measured results showed good agreement, confirming improved isolation and overall multiple-input multiple-output (MIMO) antenna system performance.

Conclusions:

A compact multiband monopole antenna with excellent performance across Wi-Fi and sub-6 GHz bands has been successfully designed.
The meander-slit DGS approach provides an effective solution for mutual coupling suppression in multiband antenna systems.
The developed antenna is suitable for integration into Internet of Things (IoT) devices and Wi-Fi infrastructure, enhancing wireless connectivity.