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A High-Order EMSIW MIMO Antenna for Space-Constrained 5G Smartphone.
Sayyed A Ali1, Mohd Wajid1, Mohammed Usman2
1Department of Electronics Engineering, Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India.
Sensors (Basel, Switzerland)
|December 28, 2021
Summary
This study introduces a compact, high-performance MIMO antenna for 5G new radio applications. The proposed design achieves high isolation and channel capacity using eighth-mode substrate integrated waveguide technology, suitable for mobile devices.
Area of Science:
- Electrical Engineering
- Antenna Theory
- Wireless Communications
Background:
- Fifth-generation (5G) new radio requires advanced antenna systems for high data rates and reliable connectivity.
- Mobile devices necessitate compact, efficient antenna solutions with high isolation and diversity performance.
- Substrate integrated waveguide (SIW) technology offers a promising platform for developing integrated antenna systems.
Purpose of the Study:
- To propose and analyze a high-order multiple-input multiple-output (MIMO) antenna operating at 3.5 GHz for 5G new radio.
- To achieve high isolation and diversity performance in a compact form factor without a decoupling network.
- To investigate the performance of a twelve-element MIMO antenna for enhanced channel capacity in smartphone applications.
Main Methods:
- Development of a two-element MIMO antenna using an eighth-mode substrate integrated waveguide (EMSIW) cavity.
- Extension to higher-order MIMO configurations (four- and twelve-element) with asymmetric EMSIW structures.
- Parametric optimization of radiation characteristics and diversity performance, including pattern and polarization diversity.
- Experimental validation of bandwidth, gain, and isolation.
Main Results:
- Achieved 6.0 dB and 10.0 dB bandwidths of 250 MHz and 100 MHz, respectively.
- Demonstrated high isolation (≥36 dB for two-element, ≥35 dB for four-element, ≥22 dB for twelve-element) without decoupling networks.
- Obtained a peak gain of 3.4 dBi with closely matched simulated and measured radiation patterns.
- Twelve-element MIMO achieved a channel capacity of 56.37 bps/Hz, a significant improvement over the two-element configuration.
Conclusions:
- The proposed EMSIW-based MIMO antenna offers a simple, low-cost, and compact solution for 5G mobile applications.
- The design effectively utilizes diversity techniques for high isolation and performance, even with closely spaced elements.
- The antenna exhibits acceptable performance under hand and head proximity conditions, making it suitable for smartphone integration.
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