A Simple Decoupling Method for 5G Millimeter-Wave MIMO Dielectric Resonator Antennas

A simple decoupling method of using metallic vias to improve the isolation of millimeter-wave multiple-input-multiple-output (MIMO) dielectric resonator antenna (DRA) elements is investigated. The vias are vertically added to the DRA elements, at appropriate positions. By means of the interaction wi...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2019-04, Vol.67 (4), p.2224-2234
Main Authors: Pan, Yong Mei, Qin, Xin, Sun, Yu Xiang, Zheng, Shao Yong
Format: Article
Language:English
Subjects:
Antenna radiation patterns
Arrays
Decoupling
Decoupling method
dielectric resonator antenna (DRA)
Dielectric resonator antennas
Dielectrics
Electromagnetic fields
Microstrip
Microstrip antennas
Millimeter waves
millimeter-wave (mm-wave) antenna
MIMO communication
multiple-input-multiple-output (MIMO) antenna
Mutual coupling
Radio antennas
Resonators
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Summary:A simple decoupling method of using metallic vias to improve the isolation of millimeter-wave multiple-input-multiple-output (MIMO) dielectric resonator antenna (DRA) elements is investigated. The vias are vertically added to the DRA elements, at appropriate positions. By means of the interaction with the electromagnetic fields, the vias can potentially affect the filed distributions and further reduce the coupled fields effectively. The isolation between the MIMO DRA elements can, therefore, be enhanced substantially. As the vias are placed inside the DRA elements, no extra footprint is needed, making the entire antenna system very simple and compact. Two typical examples, including an H-plane and an E-plane, coupled 1\times2 MIMO DRA arrays, have been designed, fabricated, and measured to demonstrate the feasibility and universality of this method. The results show that by using the vias appropriately, the isolation of the H-plane coupled MIMO DRA array can be enhanced from ~15.2 to 34.2 dB, while that of the E-plane array can be improved from ~13.1 to 43 dB at 26 GHz.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2019.2891456