Decoupling Technique Based on Field Distribution on Ground Plane for WLAN MIMO Antenna Applications
DOI:
https://doi.org/10.13052/2022.ACES.J.370906Keywords:
Decoupling, MIMO, wireless communication system, WLANAbstract
An efficiently-decoupling method for multiple-input multiple-output (MIMO) antenna systems is proposed in this paper. A planar-modified monopole antenna operating at the WLAN band is chosen as the antenna unit. The antenna structure is based on the printed circuit board technique. By observing and analyzing the ground plane’s field distribution generated by high-order modes, it is found that several stable minimum current points can be excited along the edges of the ground plane. In doing so, a high isolation can be obtained if the other antenna is placed at one of these points. The measured results and simulated results have a good agreement with each other, which well validates the proposed design concept. In addition, compared with the traditional decoupling technology, this method can improve the isolation between antennas without adding additional structures, which has excellent practicality in wireless communication system applications.
Downloads
References
W. Shi, X. Liu, and Y. Li, “ULA fitting for MIMO radar,” IEEE Communications Letters, vol. 26, 2022.
W. Shi, S. A. Vorobyov, and Y. Li, “ULA fitting for sparse array design,” IEEE Transactions on Signal Processing, vol. 69, pp. 6431-6447, 2021.
F. Faraz, X. Chen, Q. Li, J. Tang, J. Li, T. A. Khan, and X. Zhang,, “Mutual coupling reduction of dual polarized low profile MIMO antenna using decoupling resonators,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 35, no. 1, pp. 38-43, 2020.
X. Chen, M. Zhao, H. Huang, Y. Wang, S. Zhu, C. Zhang, J. Yi, and A. A. Kishk, “Simultaneous decoupling and decorrelation scheme of MIMO arrays,” IEEE Transactions on Vehicular Technology, vol. 71, no. 2, pp. 2164-2169, Feb. 2022.
B. Liu, X. Chen, J. Tang, A. Zhang, and A. Kishk, “Co- and cross-polarization decoupling structure with polarization rotation property between linearly polarized dipole antennas with application to decoupling of circularly polarized antennas,” IEEE Transactions on Antennas and Propagation, vol. 70, no. 1, pp. 702-707, Jan. 2022.
B. Qian, X. Chen, and A. Kishk, “Decoupling of microstrip antennas with defected ground structure using the common/differential mode theory,” IEEE Antennas and Wireless Propagation Letters, vol. 20, no. 5, pp. 828-832, May 2021.
Y. Wang, X. Chen, X. Liu, J. Yi, J. Chen, A. Zhang, and A. A. Kishk, “Improvement of diversity and capacity of MIMO system using scatterer array,” IEEE Transactions on Antennas and Propagation, vol. 70, no. 1, pp. 789-794, Jan. 2022.
K. Yu, Y. Li, and X. Liu, “Mutual coupling reduction of a MIMO antenna array using 3-D novel meta-material structures,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 33, no. 7, pp. 758-763, 2018.
S. Luo, Y. Li, Y. Xia, and L. Zhang, “A low mutual coupling antenna array with gain enhancement using metamaterial loading and neutralization line structure,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 34, no. 3, pp. 411-418, 2019.
J. Jiang, Y. Xia, and Y. Li, “High isolated X-band MIMO array using novel wheel-like metamaterial decoupling structure,” Applied Computational Electromagnetics Society (ACES) Journal, vol. 34, no. 12, pp. 1829-1836, 2019.
S. W. Cheung, Q. Li, D. Wu, C. Zhou, and B. Wang, “Defected ground structure with two resonances for decoupling of dual-band MIMO antenna,” IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, pp. 1645-1646, 2017.
Z. Li, Z. Du, M. Takahashi, K. Saito, and K. Ito, “Reducing mutual coupling of MIMO antennas with parasitic elements for mobile terminals,” IEEE Transactions on Antennas and Propagation, vol. 60, no. 2, pp. 473-481, Feb. 2012.
C. Wu, C. Chiu, and T. Ma, “Very compact fully lumped decoupling network for a coupled two-element array,” IEEE Antennas and Wireless Propagation Letters, vol. 15, pp. 158-161, 2016.
X. Zhao, S. P. Yeo, and L. C. Ong, “Decoupling of inverted-F antennas with high-order modes of ground plane for 5G mobile MIMO platform,” IEEE Transactions on Antennas and Propagation, vol. 66, no. 9, pp. 4485-4495, Sep. 2018.
X.-Y. Ma, Z.-Y. Pang, G. Zhao, and G.-L. Huang, “An efficient decoupling technique for WLAN MIMO antenna applications,” IEEE Asia-Pacific Microwave Conference (APMC), Hong Kong, Hong Kong, pp. 75-77, 2020.
