Isolation Enhancement in Closely Coupled Dual-Band MIMO Patch Antennas

By Zicheng Niu, Hou Zhang, Qiang Chen, Tao Zhong. IEEE Antennas and Wireless Propagation Letters, 2019

121 citations recorded by the source corpus.

This letter presents a closely coupled dual-band multiple-input–multiple-output (MIMO) patch antenna that resonates at 3.7 and 4.1 GHz. The MIMO antenna is composed of two mirror-symmetrical single-feed patch antennas that are closely placed with approximately 0.034 λ0 (where λ0 is the wavelength at 3.7 GHz). The decoupling structure consists of the modified array antenna decoupling surface (MADS) and H-shaped defect ground structures for the lower band and upper band, respectively. Through simulation and measurement, the isolation is determined to be greater than 30 dB in both frequency bands, showing a noticeable improvement compared to the original antenna array. Under the effect of the MADS, the measured gain increases by 2.2 and 0.8 dB at the resonance frequencies of 3.7 and 4.1 GHz, respectively. The measured results indicate that the proposed decoupling structure is quite suitable for closely spaced dual-band MIMO antennas.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/dadbd00659eb0f23add3560d7d37b58a467b9971

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In Aerospace Engineering

1. Yue Li
2. Libin Sun
3. Zhijun Zhang

In Electrical and Electronic Engineering

1. Yue Li
2. Libin Sun
3. Zhijun Zhang

Citations in the corpus

• Antenna Decoupling by Common and Differential Modes Cancellation (2021, background): “Recently, a novel decoupling metasurface [38]–[41] is proposed to solve the mutual coupling problem in large-scale antenna arrays by the out-of-phase cancellation of coupled waves and reflected waves.”