volume | PIER Journals

Abstract

This paper presents a compact dual-band multiple input multiple output (MIMO) antenna with low mutual coupling, operating in the 2.4 GHz band (2.4-2.485 GHz) and 5.5 GHz band (5.15-5.85 GHz). The proposed antenna system consists of two antenna elements located at the top two corners of FR4 substrate (PCB). Each element dimension is reduced substantially by employing a folded structure and slots on the top patch plate, so that it takes up a small volume of 12 × 9 × 6 mm³. To enhance port-to-port isolation and efficiency of each antenna, an additional non-radiating folded shorting strip is connected between each antenna element and ground plane of PCB. The measured isolation values are lower than -28 dB over the lower WLAN band (2.4-2.485 GHz) and better than -26 dB (-30 dB in most of the band) across the higher WLAN band (5.15-5.85 GHz). The improvement in antenna's efficiency caused to raise up 1 dB of effective diversity gain of MIMO system. Furthermore S-parameters, radiation patterns and diversity performance characteristics are provided.

1. Vaughan, R. G. and J. B. Anderson, "Antenna diversity in mobile communications," IEEE Trans. Veh. Tech., Vol. 36, No. 4, 149-172, Nov. 1987.
doi:10.1109/T-VT.1987.24115 Google Scholar

2. Foschini, G. J. and M. J. Gans, "On limits of wireless communication in a fading environment when using multiple antennas ," Wireless Pers. Commun., Vol. 6, No. 3, 311-335, 1998.
doi:10.1023/A:1008889222784 Google Scholar

3. Sonkki, M. and E. Salonen, "Low mutual coupling between monopole antennas by using two slots," IEEE Antennas Wireless Propag. Lett., Vol. 9, 138-141, 2010.
doi:10.1109/LAWP.2010.2044476 Google Scholar

4. Meshram, M. K., R. K. Animeh, A. T. Pimpale, and N. K. Nikolova, "A novel quad-band diversity antenna for LTE and Wi-Fi applications with high isolation," IEEE Trans. Antennas Propag., Vol. 60, No. 9, 4360-4371, Sep. 2012.
doi:10.1109/TAP.2012.2207044 Google Scholar

5. Chiu, C.-Y., C.-H. Cheng, R. D. Murch, and C. R. Rowell, "Reduction of mutual coupling between closely-packed antenna elements," IEEE Trans. Antennas Propag., Vol. 55, No. 6, 1732-1738, Jun. 2007.
doi:10.1109/TAP.2007.898618 Google Scholar

6. Wu, T.-Y., S.-T. Fang, and K.-L. Wong, "A printed diversity dual band monopole antenna for WLAN operation in the 2.4 and 5.2 GHz bands," Microwave Opt. Technol. Lett., Vol. 36, No. 6, 436-439, Mar. 2003.
doi:10.1002/mop.10784 Google Scholar

7. Zhang, S., Z. Ying, J. Xiong, and S. He, "Ultra-wide band MIMO/diversity antennas with a tree-like structure to enhance wideband isolation," IEEE Antennas Wireless Propag. Lett., Vol. 8, 1279-1283, 2009.
doi:10.1109/LAWP.2009.2037027 Google Scholar

8. Weng, L. H., Y. C. Guo, X. W. Shi, and X. Q. Chen, "An overview on defected ground structure," Progress In Electromagnetics Research B, Vol. 7, 173-189, 2008.
doi:10.2528/PIERB08031401 Google Scholar

9. Makinen, R., V. Pynttari, J. Heikkinen, and M. Kivikoski, "Improvement of antenna isolation in hand-held devices using miniaturized electromagnetic band-gap structures," Microw. Opt. Technol. Lett., Vol. 49, No. 10, 2508-2513, Oct. 2007.
doi:10.1002/mop.22761 Google Scholar

10. Hsu, C.-C., K.-H. Lin, H.-L. Su, H.-H. Lin, and C.-Y. Wu, "Design of MIMO antennas with strong isolation for portable applications," Proc. IEEE AP-S, 1-4, Charleston, SC, Jun. 2009. Google Scholar

11. Diallo, A., C. Luxey, P. Le Thuc, R. Staraj, and G. Kossiavas, "Study and reduction of the mutual coupling between two mobile phone PIFAs operating in the DCS1800 and UMTS bands," IEEE Trans. Antennas Propag., Vol. 54, No. 11, 3063-3074, Nov. 2006.
doi:10.1109/TAP.2006.883981 Google Scholar

12. Luxey, C. and D. Manteuffel, "Highly efficient multiple antennas for MIMO-systems," Proc. IEEE iWAT, 1-3, Lisbon, Portugal, Mar. 2010. Google Scholar

13. 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 Google Scholar

14. Saidatul, N. A., A. A. H. Azremi, R. B. Ahmad, P. J. Sohand, and F. Malek, "Multiband fractal planar inverted F antenna (F-PIFA) for mobile phone application," Progress In Electromagnetics Research B, Vol. 14, 127-148, 2009.
doi:10.2528/PIERB09030802 Google Scholar

15. CST Microwave Studio, [online], available: http://www.cst.com.

16. Taga, T., "Analysis for mean effective gain of mobile antennas in land mobile radio environments ," IEEE Trans. Veh. Tech., Vol. 39, No. 2, 117-131, May 1990.
doi:10.1109/25.54228 Google Scholar

17. Dong, L., H. Ling, and R. W. Heath, "Multiple-input multiple-output wireless communication systems using antenna pattern diversity," Proc. IEEE Global Telecommun. Conf., Vol. 1, 997-1001, Taipei, Taiwan, Nov. 2002.

18. Pedersen, K., P. Mogensen, and B. Fleury, "Power azimuth spectrum in outdoor environments," Electron. Lett., Vol. 33, No. 18, 1583-1584, Aug. 1997.
doi:10.1049/el:19971029 Google Scholar

19. Karaboikis, M. P., V. C. Papamichael, G. F. Tsachtsiris, C. F. Soras, and V. T. Makios, "Integrating compact printed antennas onto small diversity/MIMO terminals," IEEE Trans. Antennas Propag., Vol. 56, No. 7, 2067-2078, Jul. 2008.
doi:10.1109/TAP.2008.924677 Google Scholar

20. Jusoh, M., M. F. Jamlos, M. R. Kamarudin, and F. Malek, "A MIMO antenna design challenges for UWB applications," Progress In Electromagnetics Research B, Vol. 36, 357-371, 2012.
doi:10.2528/PIERB11092701 Google Scholar

21. Schwartz, M., W. R. Bennett, and S. Stein, Communication System and Techniques, 470-474, McGraw-Hill, New York, 1965.

22. Pierce, J. N. and S. Stein, "Multiple diversity with non independent fading," IRE Proc., Vol. 48, 89-104, Jan. 1960.

23. Rao, Q. and K. Wilson, "Design, modeling, and evaluation of a multiband MIMO/diversity antenna system for small wireless mobile terminals," IEEE Trans. on Components, Packaging and Manufacturing Tech., Vol. 1, No. 3. Google Scholar

Dr. Hari Shankar Singh

Dr. Bhaskara Reddy Meruva

Mr. Gaurav Kumar Pandey

Dr. Pradutt Kumar Bharti

Dr. Manoj Kumar Meshram