Compact UWB MIMO Antenna With High Isolation Using Fence-Type Decoupling Structure

By Lili Wang, Zhonghong Du, Hailong Yang, Ruoyan Ma, Yuchen Zhao, Xueqi Cui, Xiaoli Xi. IEEE Antennas and Wireless Propagation Letters, 2019

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In this letter, an ultrawideband (UWB) multiple-input–multiple-output (MIMO) antenna using a novel fence-type decoupling structure, which has high isolation in the UWB, is presented. The MIMO design consists of two half-cutting UWB antenna units that have good low-frequency impedance-matching performance because of the use of a rectangular slot on the radiation patch. Meanwhile, the isolation in the operating band is enhanced by introducing the fence-type decoupling structure at the ground of the antenna. Furthermore, the L-shaped parasitic branches are designed to heighten the impedance bandwidth and isolation in the low-frequency band, i.e., 3–3.4 GHz. The simulation and experiments show that the antenna has low mutual coupling (S21 < –25 dB) and a low envelope correlation coefficient (ECC < 0.004) in the UWB.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/5fc8e41e6d334d322b53a477a7f33ce49c888366