Mutual Coupling Reduction in Microstrip Antennas using Defected Ground Structure

Lan Ngoc Nguyen


A Multiple Input Multiple Output (MIMO) antenna with high isolation is proposed in this paper. The proposed antenna includes two sets of four elements (2 x 2) and it is yielded at the central frequency of 5.5 GHz for Wireless Local Area Network (WLAN) applications. Based on RT5880 with height of 1.575 mm, the overall size of MIMO antenna is 140 x 76 x 1.575 mm3. To get high isolation between antenna elements, a Defected Ground Structure (DGS) is integrated on ground plane. Besides, the MIMO antenna witnesses a large bandwidth of 9.1% and an efficiency of 90% while the pick gain is 8.5 dBi. The measurement results are compared to simulation ones to verify the performance of the proposed antenna.

Full Text:



S. Alam, M. T. Islam, and H. Arshad, 2014, “Gain Enhancement of a Multiband Resonator Using Defected Ground Surface on Epoxy Woven Glass Material,” The Scientific World Journal, vol. 2014.

P. R. Prajapati and S. B. Khant, 2018, “Design of UWB monopole antenna with enhanced gain using partially reflective surface,” International Journal of Microwave and Wireless Technologies, vol. 10, no. Special Issue 7, pp. 835–842.

B. Mohamazade and M. Afsahi, 2017, “Mutual Coupling Reduction and Gain Enhancement in Patch Array Antenna Using a Planar Compact Electromagnetic Band Gap (EBG) Structures,” IET Microwaves, Antennas & Propagation, pp. 1719–1725.

and S. K. K. Abhishek Kandwal, Rakesh Sharma, 2013, “Bandwidth Enhancement using Z-Shaped Defected Ground Structure for A Microstrip Antenna,” Microwave and Optical Technology Letters, vol. 55, no. 10, pp. 2251–2254.

H. Y. Zhang, F. S. Zhang, F. Zhang, T. Li, and C. Li, 2017, “Bandwidth Enhancement of a Horizontally Polarized Omnidirectional Antenna by Adding Parasitic Strips,” IEEE Antennas and Wireless Propagation Letters, vol. 16, no. c, pp. 880–883.

L. H. Weng, Y. C. Guo, X. W. Shi, and X. Q. Chen, 2008, “An Overview on Defected Ground Structure,” Progress In Electromagnetics Research B, vol. 7, pp. 173–189.

W. Jiang, L. Yang, B. Wang, and S. Gong, 2017, “A high isolation dual-band MIMO antenna for WLAN application,” 2017 International Symposium on Antennas and Propagation, ISAP 2017, vol. 2017–Janua, pp. 1–2.

A. J. Paulraj, D. A. Gore, R. U. Nabar, and H. Bölcskei, 2004, “An overview of MIMO communications - A key to gigabit wireless,” Proceedings of the IEEE, vol. 92, no. 2, pp. 198–217.

J. J. Liang, J. S. Hong, J. B. Zhao, and W. Wu, 2015, “Dual-band dual-polarized compact log-periodic dipole array for MIMO WLAN applications,” IEEE Antennas and Wireless Propagation Letters, vol. 14, no. c, pp. 751–754.

R. Anitha, P. V. Vinesh, K. C. Prakash, P. Mohanan, and K. Vasudevan, 2016, “A Compact Quad Element Slotted Ground Wideband Antenna for MIMO Applications,” IEEE Transactions on Antennas and Propagation, vol. 64, no. 10, pp. 4550–4553.

N. Kumar and U. K. Kommuri, 2018, “MIMO Antenna Mutual Coupling Reduction for WLAN Using Spiro Meander Line UC-EBG,” Progress In Electromagnetics Research C, vol. 80, no. 1, pp. 65–77.

N. C. K. MD Shakil Bhuiyan, 2014, “Defected Ground Structures for Microwave Applications,” Wiley Encyclopedia of Electrical and Electronics Engineering, pp. 1–31.

Constantine A. Balanis, Antenna theory: Analysis and Design, Fourth edi. Canada: John Wiley & Sons, Inc, 2016.

D. Pozar, Microwave Engineering, Fourth Edi. John Wiley & Sons, Inc, 2005.

M. K. Khandelwal, B. K. Kanaujia, and S. Kumar, 2017, “Defected Ground Structure: Fundamentals, Analysis, and Applications in Modern Wireless Trends,” International Journal of Antennas and Propagation, vol. 2017, pp. 1–22.

S. Blanch, J. Romeu, and I. Corbella, 2003, “Exact representation of antenna system diversity performance from input parameter description,” Electronics Letters, vol. 39, no. 9, p. 705.

A. A. A. R. Mallahzadeh, S. Es’haghi, 2009, “Design of an E-shaped MIMO Antenna using IWO Algorithm for Wireless Application at 5.8 GHz,” Progress In Electromagnetics Research, vol. 90, pp. 187–203.

M. Y. Talha, K. J. Babu, and R. W. Aldhaheri, 2016, “Design of a compact MIMO antenna system with reduced mutual coupling,” International Journal of Microwave and Wireless Technologies, vol. 8, no. 1, pp. 117–124.

D. T. T. Tu, N. G. Thang, N. T. Ngoc, N. T. B. Phuong, and V. Van Yem, 2017, “28/38 GHz dual-band MIMO antenna with low mutual coupling using novel round patch EBG cell for 5G applications,” International Conference on Advanced Technologies for Communications, vol. 2017–Octob, pp. 64–69.

L. Malviya, R. K. Panigrahi, and M. V. Kartikeyan, 2016, “Circularly Polarized 2×2 Mimo Antenna for Wlan Applications,” Progress In Electromagnetics Research C, vol. 66, no. July, pp. 97–107.


Copyright (c) 2020 REV Journal on Electronics and Communications

Copyright © 2011-2021
Radio and Electronics Association of Vietnam
All rights reserved