volume | PIER Journals

Abstract

In this paper, a compact and simple microstrip-fed slot antenna is proposed for ultra-wideband (UWB) applications, which consists of a circular patch and an open T-slot to realize the microstrip-line to slot transition well over a widened frequency range. The simulations and measurements show that this simple structure with the novel design generates a broadband impedance bandwidth of 10dB return loss from 2.5 to 12.5 GHz (BW=133.3%) adjustable by variation of its parameters. Details of the antenna design and experimental results of the constructed prototype are presented. In addition, a geometric parameters study of the proposed antenna is able to provide more useful information for antenna design.

1. Jang, Y. W., "Broadband cross-shaped micro-strip-fed slot antenna," Electron. Lett., Vol. 36, 2056-2057, 2000.
doi:10.1049/el:20001477

2. Suh, Y. H. and I. Park, A broadband eccentric annular slot antenna, IEEE Antennas and Propag. Soc. Int. Symp. Dig., Vol. 1, 94-97, 2001.

3. Liu, Y. F., K. L. Lau, Q. Xue, and C. H. Chan, "Experimental studies of printed wide slot antenna for wide-band applications," IEEE Antennas and Wireless Propag. Lett., Vol. 3, 273-275, 2004.
doi:10.1109/LAWP.2004.837510

4. Chen, H. D., J. S. Chen, and J. N. Li, "Ultra-wideband aquare-slot antenna," Microwave Opt. Technol. Lett., Vol. 48, 500-502, 2006.
doi:10.1002/mop.21391

5. Dastranj, A., A. Imani, and M. N. Moghaddasi, "Printed wideslot antenna for wideband applications," IEEE Trans. on Antennas Propag., Vol. 56, 3097-3102, 2008.
doi:10.1109/TAP.2008.929459

6. Wang, C. J. and S. W. Chang, "A technique of bandwidth enhancement for the slot antenna," IEEE Trans. on Antennas Propag., Vol. 56, 3321-3324, 2008.
doi:10.1109/TAP.2008.929542

7. Latif, S. I., S. K. Sharma, and L. Shafai, Wideband microstrip monopole slot antenna, Antennas, Propag. and EM Theory Int. Symp. Dig., 54-57, 2003.

8. Latif, S. I., L. Shafai, and S. K. Sharma, "Bandwidth enhancement and size reduction of microstrip slot antennas," IEEE Trans. on Antennas Propag., Vol. 53, 994-1003, 2005.
doi:10.1109/TAP.2004.842674

9. Chen, W. S. and K. Y. Ku, "Broadband design of non-symmetric ground λ/4 open slot antenna with small size," Microwave J., Vol. 50, 110-121, 2007.

10. Chen, W. S. and K. Y. Ku, "Band-rejected design of the printed open slot antenna for WLAN/WiMAX operation," IEEE Trans. on Antennas Propag., Vol. 56, 1163-1169, 2008.
doi:10.1109/TAP.2008.919192

11. Chen, W. S., F. Y. Lin, and K. C. Yang, "Studies of small open-slot antennas for wide-band applications," IEEE Antennas and Propag. Soc. Int. Symp. Dig., 2008.

Dr. Xu-Fei Zhu

Prof. Donglin Su