volume | PIER Journals

Abstract

A novel ultra wideband (UWB) multiple-input-multiple-output (MIMO) antenna with different polarizations and band-notch characteristics is proposed in this letter. The antenna consists of two monopole antenna radiating elements with gradual change structure, which are placed perpendicularly to each other and printed on each side of the substrate to achieve a wide bandwidth and different polarizations. Band-rejected filtering property in the WLAN band is achieved by etching a H-shaped slot and employing a resonant L-shaped strip on two antenna elements. The proposed antenna has a small size of 27×37×1 mm³ with a bandwidth of 128.6% (2.35-10.82 GHz). Within the required band, the isolation for the two ports exceeds 18 dB. The envelope correlation coefficient is also measured.

1. Yang, L. and G. B. Giannakis, "Analog space-time coding for multi-antenna ultra-wideband transmissions," IEEE Trans. Commun., Vol. 52, No. 3, 507-517, Mar. 2004.
doi:10.1109/TCOMM.2004.823644 Google Scholar

2. Wong, K. L., S. W. Su, and Y. L. Kuo, "A printed ultra-wideband diversity monopole antenna," Microw. Opt. Technol. Lett., Vol. 38, No. 4, 257-259, 2003.
doi:10.1002/mop.11031 Google Scholar

3. Hong, S., K. Chung, J. Lee, S. Jung, S. S. Lee, and J. Choi, "Design of a diversity antenna with stubs for UWB applications," Microw. Opt. Technol. Lett., Vol. 50, No. 5, 1352-1356, 2008.
doi:10.1002/mop.23389 Google Scholar

4. Lu, Y. and Y. Lin, "A compact dual-polarized UWB antenna with high port isolation," IEEE Int. Symp. Antennas Propagation Society Int. Symp. (APS' 2010), 1-4, Toronto, Canada, Jul. 11-17, 2010. Google Scholar

5. Antonino-Daviu, E., M. Gallo, B. Bernardo-Clemente, and M. Ferrando-Bataller, "Ultra-wideband slot ring antenna for diversity applications," Electron. Lett., Vol. 46, No. 7, 478-480, 2010.
doi:10.1049/el.2010.0262 Google Scholar

6. Khan, M. S., M. F. Shafique, A. D. Capobianco, E. Autizi, and I. Shoaib, "Compact UWB-MIMO antenna array with a novel decoupling structure," Proceedings of 2013 10th International Bhurban Conference on Applied Sciences & Technology (IBCAST), 347-350, Islamabad, Pakistan, Jan. 15-19, 2013. Google Scholar

7. Zhang, S., Z. Ying, J. Xiong, and S. He, "Ultra wideband MIMO/diversity antennas with a tree-like structure to enhance wideband isolation," IEEE Antenna and Wireless Propagation Letter, Vol. 8, 1279-1282, 2009.
doi:10.1109/LAWP.2009.2037027 Google Scholar

8. Zhang, S., P. Zetterberg, and S. He, "Printed MIMO antenna system of four closely-spaced elements with large bandwidth and high isolation," Electron. Lett., Vol. 46, No. 15, 1052-1053, 2010.
doi:10.1049/el.2010.1445 Google Scholar

9. Zhang, S., B. K. Lau, A. Sunesson, and S. He, "Closely-packed UWB MIMO/diversity antenna with di?erent patterns and polarizations for USB dongle applications," IEEE Trans. Antennas Propag., Vol. 60, No. 9, 4372-4380, 2012.
doi:10.1109/TAP.2012.2207049 Google Scholar

10. Zhao, J.-Y., G. Fu, L.-Y. Ji, Q.-Y. Lu, and Z.-Y. Zhang, "Compact printed ultra-wideband antenna with dual band-notched characteristics," Proc. Int. Conf. Electronics, Communications and Control (ICECC' 2011), 780-782, Ningbo, China, Sep. 9-11, 2011. Google Scholar

Dr. Jia-Yue Zhao

Dr. Zhi-Ya Zhang

Dr. Qiong-Qiong Liu

Dr. Guang Fu

Prof. Shu-Xi Gong