An Eight-Element Compact Low-Profile Planar MIMO Antenna Using LC Resonance with High Isolation

Title & Authors
An Eight-Element Compact Low-Profile Planar MIMO Antenna Using LC Resonance with High Isolation
Kwon, DukSoo; Lee, Soo-Ji; Kim, Jin-Woo; Ahn, ByungKuon; Yu, Jong-Won; Lee, Wang-Sang;

Abstract
An eight-element compact low-profile multi-input multi-output (MIMO) antenna is proposed for wireless local area network (WLAN) mobile applications. The proposed antenna consists of eight inverted-F antennas with an isolation-enhanced structure. By inserting the isolation-enhanced structure between the antenna elements, the slot and capacitor pair generates additional resonant frequency and decreases mutual coupling between the antenna elements. The overall size of the proposed antenna is only $\small{33mm{\times}33mm}$, which is integrated into an area of just $\small{0.5{\lambda}{\times}0.5{\lambda}}$. The proposed antenna meets 5-GHz WLAN standards with an operation bandwidth of 4.86 - 5.27 GHz and achieves an isolation of approximately 30 dB at 5 GHz. The simulated and measured results for the proposed antenna are presented and compared.
Keywords
Isolation Technology;MIMO;Mutual Coupling;
Language
English
Cited by
References
1.
M. S. Sharawi, "Printed multi-band MIMO antenna systems and their performance metrics [wireless corner]," IEEE Antennas and Propagation Magazine, vol. 55, no. 5, pp. 218-232, 2013.

2.
D. M. Pozar and D. H. Schaubert, Microstrip Antennas: The Analysis and Design of Microstrip Antennas and Arrays. New York: John Wiley & Sons, 1995.

3.
S. C. Chen, Y. S. Wang, and S. J. Chung, "A decoupling technique for increasing the port isolation between two strongly coupled antennas," IEEE Transactions on Antennas and Propagation, vol. 56, no. 12, pp. 3650-3658, 2008.

4.
M. S. Han and J. Choi, "MIMO antenna using a decoupling network for next generation mobile application," in Proceedings of the 9th International Symposium on Communications and Information Technology, Incheon, Korea, 2009, pp. 568-571.

5.
C. Y. Chiu, C. H. Cheng, R. D. Murch, and C. R. Rowell, "Reduction of mutual coupling between closely-packed antenna elements," IEEE Transactions on Antennas and Propagation, vol. 55, no. 6, pp. 1732-1738, 2007.

6.
K. S. Min, D. J. Kim, and Y. M. Moon, "Improved MIMO antenna by mutual coupling suppression between elements," in Proceedings of the European Conference on Wireless Technology, Paris, 2005, pp. 135-138.

7.
L. Yang, M. Fan, F. Chen, J. She, and Z. Feng, "A novel compact electromagnetic-bandgap (EBG) structure and its applications for microwave circuits," IEEE Transactions on Microwave Theory and Techniques, vol. 53, no. 1, pp. 183-190, 2005.

8.
M. T. Islam and M. S. Alam, "Compact EBG structure for alleviating mutual coupling between patch antenna array elements," Progress in Electromagnetics Research, vol. 137, pp. 425-438, 2013.

9.
J. Park, J. Choi, J. Y. Park, and Y. S. Kim, "Study of a T-shaped slot with a capacitor for high isolation between MIMO antennas," IEEE Antennas and Wireless Propagation Letters, vol. 11, pp. 1541-1544, 2012.

10.
A. C. K. Mak, C. R. Rowell, and R. D. Murch, "Isolation enhancement between two closely packed antennas," IEEE Transactions on Antennas and Propagation, vol. 56, no. 11, pp. 3411-3419, 2008.

11.
S. Zhang, P. Zetterberg, and S. He, "Printed MIMO antenna system of four closely-spaced elements with large bandwidth and high isolation," Electronics Letters, vol. 46, no. 15, pp. 1052-1053, 2010.

12.
H. Li, J. Xiong, Z. Ying, and S. He, "High isolation compact four-port MIMO antenna systems with built-in filters as isolation structure," in Proceedings of the Fourth European Conference on Antennas and Propagation, Barcelona, 2010, pp. 1-4.