volume | PIER Journals

Abstract

A compact ultrawideband (UWB) monopole antenna with two U-shaped slots for WLAN and WiMAX dual band-notched functions is proposed and experimentally studied. The proposed antenna with the size of 28 mm×24 mm×1.6 mm is excited by a 50Ω microstrip feed line. The band-notch functions are realized by loading two approximate half-wavelength U-shaped slots which change the current distribution on the Y-shaped patch. The obtained results show that the designed antenna has an impedance bandwidth of 2.95 GHz-12 GHz for S₁₁ ≤ -10 dB, except two frequency stop-bands of 3.32 GHz-3.98 GHz for WiMAX and 4.81 GHz-6.68 GHz for WLAN. The antenna has successfully fabricated and measured. The return loss, band-notched characteristic, radiation patterns and peak gains are presented.

1. Ahmed, O. and A.-R. Sebak, "A printed monopole antenna with two steps and a circular slot for UWB applications," IEEE Antenna and Wireless Propagation Letters, Vol. 7, 411-413, Nov. 2008.
doi:10.1109/LAWP.2008.2001026 Google Scholar

2. Srifi, M. N., O. El Mrabet, F. Falcone, M. S. Ayza, and M. Essaaidi, "A novel compact printed circular antenna for very ultrawideband applications," Microwave and Optical Technology Letters, Vol. 15, No. 4, 1130-1133, 2009.
doi:10.1002/mop.24261 Google Scholar

3. Thong, N. D. and V. V. Yem, "Combining two methods to enhance band-notch characteristic of ultra wide band antenna," The International Conference on Advanced Technologies for Communications, 206-210, 2009. Google Scholar

4. Chu, Q.-X. and T.-G. Huang, "A compact UWB antenna with sharp band-notched characteristics and controllable notched bandwidth," Proceedings of Asia-Pacific Microwave Conference, 630-633, 2010. Google Scholar

5. Xie, H.-H., Y.-C. Jiao, Z. Zhang, and Y. Song, "Band-notched ultra-wideband monopole antenna using coupled resonator," Electronics Letters, Vol. 46, No. 16, 1099-1100, 2010.
doi:10.1049/el.2010.1331 Google Scholar

6. Jang, J.-W. and H.-Y. Hwang, "An improved band-rejection UWB antenna with resonant patches and a slot," IEEE Antenna and Wireless Propagation Letters, Vol. 8, 299-302, 2009.
doi:10.1109/LAWP.2009.2015344 Google Scholar

7. Choi, N., C. Jung, J. Byun, F. J. Harackiewicz, M.-J. Park, Y.-S. Chung, T. Kim, and B. Lee, "Compact UWB antenna with I-shaped band-notch parasitic element for laptop applications," IEEE Antenna and Wireless Propagation Letters, Vol. 8, 580-582, 2009.
doi:10.1109/LAWP.2009.2021286 Google Scholar

8. Dong, Y. D., W. Hong, Z. Q. Kuai, and J. Y. Zhou, "Band-notched ultra-wideband antenna designed and optimized by current distribution analysis ," International Conference on Microwave and Millimeter Wave Technology, Vol. 3, 1062-1065, 2008.
doi:10.1109/ICMMT.2008.4540605 Google Scholar

9. Sadat, S., M. Fardis, F. Geran, and G. Dadashzadeh, "A compact microstrip square-ring slot antenna for UWB applications," Progress In Electromagnetics Research, Vol. 67, 173-179, 2007.
doi:10.2528/PIER06082901 Google Scholar

Dr. Si-Ming Zhang

Dr. Fu-Shun Zhang

Dr. Wen-Zhu Li

Dr. Ting Quan

Dr. Hui-Ying Wu