CPW Fed Double T-Shaped Array Antenna with Suppressed Mutual Coupling

A. DANIDEH, A. A. Lotfi NEYESTANAK

.

DOI: 10.4236/ijcns.2010.32027                

Abstract

A compact CPW-fed double T-Shaped antenna is proposed for dual-band wireless local area network (WLAN) operations. For the proposed antenna, the -10 dB return loss bandwidth could reach about 25.5% for the 2.4 GHz band and 5.7 % for the 5 GHz band, which meet the required bandwidth specification of WLAN standard. To reduce the mutual coupling and get high isolation between two dual-band antennas, we proposed the novel electromagnetic band gap (EBG) structures. When the EBG structure is employed, a -13dB and -30dB mutual coupling reduction is achieved at 2.4 and 5.2 GHz. It shows that the features of small size, uniplanar structure, good radiation characteristics and small mutual coupling are promising for multi-input multi-output (MIMO) applications.

Keywords

CPW, T-Shaped Antenna, WLAN, MIMO, Mutual Coupling

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Y. L. Kuo and K. L. Wong, “Printed double-T monopole antenna for 2.4/5.2 GHz dual-band WLAN operations,” IEEE Transactions on Antennas and Propagation, Vol. 51, No. 9, September 2003.
[2]	L. Zhang, Y. C. Jiao, G. Zhao, Y. Song, and F. S. Zhang, “Broadband dual-band CPW-Fed closed rectangular ring monopole antenna with a vertical strip for WLAN operation,” Microwave and Optical Technology Letters, Vol. 50, No. 7, pp. 1929–1931, 2008.
[3]	C. M. Wu, “Dual-band CPW-fed cross-slot monopole antenna for WLAN operation,” IET Microwave and Antennas Propagation. Vol. 1, No. 2, pp. 542–546, 2007.
[4]	W. C. Liu, “Broadband dual-frequency CPW-fed antenna with a cross shaped feeding line for WLAN application,” Microwave and Optical Technology Letters, Vol. 49, No. 7, pp. 1739–1744, 2007.
[5]	Y. Y. Cui, Y. Q. Sun, H. C. Yang, and C. L. Ruan, “A new triple-band CPW-fed monopole antenna for WLAN and WiMAX applications,” Progress in Electromagnetics Research M, Vol. 2, pp. 141–151, 2008.
[6]	C. W. Liu, “Optimal design of dual band CPW-fed G-shaped monopole antenna for WLAN application,” Progress in Electromagnetics Research, PIER 74, pp. 21–38, 2007.
[7]	W. Ren, “Compact dual-band slot antenna for 2.4/5 GHz WLAN applications,” Progress in Electromagnetics Research B, Vol. 8, pp. 319–327, 2008.
[8]	E. Wang, J. Zheng, and Y. Liu, “A novel dual-band patch antenna for WLAN communication,”Progress in Electromagnetics Research C, Vol. 6, pp. 93–102, 2009.
[9]	R. Zaker, C. Ghobadi, and J. Nourinia, “A modified microstrip-fed two-step tapered monopole antenna for UWB and WLAN applications,” Progress in Electro-magnetics Research, PIER 77, pp. 137–148, 2007.
[10]	R. D. Murch and K. B. Letaief, “Antenna systems for broadband wireless access,” IEEE Communication Magzine, Vol. 40, No. 4, pp. 76–83, April, 2002.
[11]	F. Yang and Y. Rahmat-Samii, “Microstrip antennas integrated with electromagnetic band-gap (EBG) struc-tures: A low mutual coupling design for array appli-cations,” IEEE Transactions Microwave Theory Tech-niques, Vol. 51, pp. 2936–2946, October, 2003.
[12]	H. K. Xin, M. K. Matsugatani, J. Hacker, J. A. Higgins, M. Rosker, and M. Tanaka, “Mutual coupling reduction of low profile monopole antennas on high-impedance ground plane,” Electronics Letters, Vol. 38, No. 16, pp. 849–850, August, 2002.