volume | PIER Journals

2014-09-10

Collocated MIMO Antenna with Reduced Mutual Coupling Using Square Ring DGS

Ramachandran Anitha,

Dr. Ramachandran Anitha

Department of Electronics

Cochin University of Science and Technology

India

Homepage

Puthiyapurayil Viswanathan Vinesh,

Dr. Puthiyapurayil Viswanathan Vinesh

Department of Electronics

Cochin University of Science and Technology

India

Homepage

Sumitha Mathew,

Dr. Sumitha Mathew

Department of Electronics

Cochin University of Science and Technology

India

Homepage

Pezholil Mohanan,

Professor Pezholil Mohanan

Department of Electronics

Cochin University of Science & Technology

India

Homepage

Kesavath Vasudevan

Professor Kesavath Vasudevan

Department of Electronics

Cochin University of Science & Technology

India

Homepage

Progress In Electromagnetics Research C, Vol. 53, 119-125, 2014

doi:10.2528/PIERC14072107

Abstract

A multimode collocated microstrip patch antenna with reduced mutual coupling is proposed in this paper. The antenna is designed to achieve polarization and pattern diversity for use in multiple-input-multiple-output (MIMO) terminals. The four-port antenna resonates at 2.45 GHz and have total dimension of 1.03λ with reduced mutual coupling (< -20 dB) between its ports. It consists of a simple square patch and a square ring antenna, with a novel square ring slot defected ground structure (DGS). Square ring slot on ground improves isolation by 7 dB by reducing surface waves in both E and H planes. With defected ground structure (DGS), coupling between patch and ring antennas is about -25 dB and correlation factor is less than 0.1. Pattern diversity, mutual coupling and correlation coefficient between signals for a four-port antenna fabricated using FR4 substrate is discussed in this paper.

Citation

Copy Export

Ramachandran Anitha, Puthiyapurayil Viswanathan Vinesh, Sumitha Mathew, Pezholil Mohanan, and Kesavath Vasudevan, "Collocated MIMO Antenna with Reduced Mutual Coupling Using Square Ring DGS," Progress In Electromagnetics Research C, Vol. 53, 119-125, 2014.
doi:10.2528/PIERC14072107

References

1. Konanur, A. S., et al. "Increasing wireless channel capacity through MIMO systems employing co-located antennas," IEEE Trans. Microwave Theory and Techniques, Vol. 53, No. 6, 1837-1844, Jun. 2005.
doi:10.1109/TMTT.2005.848105

2. Bait-Suwailam, M. M., M. S. Boybay, and O. M. Ramahi, "Mutual coupling reduction in MIMO antennas using artificial magnetic materials," Proc. 13th Int. ANTEM/URSI, 1-4, Feb. 2009.

3. Chen, S. C., Y. S. Wang, and S. J. Chung, "A decoupling technique for increasing the port isolation between two strongly coupled antennas," IEEE Trans. Antennas Propag., Vol. 56, No. 12, 3650-3658, Dec. 2008.
doi:10.1109/TAP.2008.2005469

4. Sanchez, L. I., J. L. V. Roy, and E. R. Iglesias, "High isolation proximity coupled multilayer patch antenna for dual-frequency operation," IEEE Trans. Antennas Propag., Vol. 56, No. 4, 1180-1183, Apr. 2008.
doi:10.1109/TAP.2008.919218

5. Sarrazin, J., Y. Mahe, S. Avrillon, and S. Toutain, "Collocated microstrip antennas for MIMO systems with a low mutual coupling using mode confinement," IEEE Trans. Antennas Propag., Vol. 58, No. 2, 589-592, Feb. 2010.
doi:10.1109/TAP.2009.2037690

6. Li, H., J. Xiong, and S. He, "A compact planar MIMO antenna system of four elements with similar radiation characteristics and isolation structure," IEEE Antennas Wireless Propag. Lett., Vol. 8, 1107-1110, 2009.
doi:10.1109/LAWP.2009.2034110

7. Chiu, C.-Y. and R. D. Murch, "Compact four-port antenna suitable for portable MIMO devices," EEE Antennas Wireless Propag. Lett., Vol. 7, No. 2, 142-144, 2008.
doi:10.1109/LAWP.2008.919341

8. Row, G. S., S. H. Yeh, and K. L. Wong, "Compact dual-polarized microstrip antennas," Microw. Opt. Technol. Lett., Vol. 27, 284-287, Nov. 2000.

9. Waterhouse, R. B., Microstrip Patch Antennas: A Designers Guide, Chap. 4, Kluwer Academic Publishers, 2003.
doi:10.1007/978-1-4757-3791-2

10. Rembold, B., "Relation between diagram correlation factors and S-parameters of multiport antenna with arbitrary feeding network," Electronics Letters, Vol. 44, 5-7, Jan. 2008.
doi:10.1049/el:20082597