paper 150403084826

Abstract

In recent years, the UWB filters and UWB antennas have attracted much research interest and many design methods have been presented. At present, the research of typical band notched filter for suppressing narrow-band interference signal, by adjusting the number and width of notched stop-band, which is not systematic and deep enough. This paper proposed two compact UWB band pass filters based on open-loaded stub structure. The main advantages of two proposed filters are that the frequency of the notched band can be easily tuned in a wide UWB frequency band. The notch frequency of two filters can be changed by adjusting the size of rectangular resonator and the length of the open-load stub. The simulation results indicated that the filter with one open-load stub can cover the UWB frequency range and enhance the interference immunity from 4.7 GHz to 5.3 GHz in low frequency and from 8.8 GHz to 9.8 GHz in high frequency. The filter with two open-load stubs can generate two notch bands from 5.4 GHz to 5.6 GHz in low frequency and 9.3 GHz to 9.6 GHz in high frequency. The proposed two compact UWB band pass filters can efficiently reduce the interference from undesired signals in WLAN band and in X-band with certain application prospects.

1. FCC, , Revision of Part 15, the Commission's rules regarding to ultra-wide-band transmission system, 98-153 First Note and Order Federal Communication Commission, ET-Docket 98-153, 2002. Google Scholar

2. Wong, Sai Wai and Lei Zhu, "Implementation of Compact UWB Bandpass Filter With a Notch-Band," IEEE Microwave and Wireless Components Letters, Vol. 18, No. 1, 10–12, January 2008.
doi:10.1109/lmwc.2007.911972 Google Scholar

3. Duong, Thai Hoa, Jae Young Lee, and Ihn S. Kim, "New bandstop filter based on capacitively coupled λ/4 short-circuited lines embedded into U.S. UWB BPF," 2010 IEEE MTT-S International Microwave Symposium, 225–228, 225–228, May 2010.
doi:10.1109/mwsym.2010.5518120 Google Scholar

4. Wei, F., C.-J. Gao, B. Liu, H.-W. Zhang, and X.-W. Shi, "UWB bandpass filter with two notch-bands based on SCRLH resonator," Electronics Letters, Vol. 46, No. 16, 1134–1135, August 2010.
doi:10.1049/el.2010.1743 Google Scholar

5. Ghatak, R, P Sarkar, R K Mishra, and D R Poddar, "A Compact UWB Bandpass Filter With Embedded SIR as Band Notch Structure," IEEE Microwave and Wireless Components Letters, Vol. 21, No. 5, 261–263, May 2011.
doi:10.1109/lmwc.2011.2128302 Google Scholar

6. Yang, X. D., Y. S. Li, and C. Y. Liu, "A Toothbrush-shaped Patch Antenna for Millimeter-wave Communication," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 1, 31–37, January 2009.
doi:10.1163/156939309787604634 Google Scholar

7. Li, Y.S., X.D. Yang, C.Y. Liu, and T. Jiang, "Compact CPW-fed ultra-wideband antenna with dual band-notched characteristics," Electronics Letters, Vol. 46, No. 14, 967–968, July 2010.
doi:10.1049/el.2010.8386 Google Scholar

8. Yang, Xiao-dong, Ying-song Li, Qu-tang Li, and Cheng-yuan Liu, "Analysis and experimental investigation on a novel wideband sleeve dipole array antenna," AEU - International Journal of Electronics and Communications, Vol. 65, No. 4, 373–376, April 2011.
doi:10.1016/j.aeue.2010.03.004 Google Scholar

9. Li, Y. S., X. D. Yang, C. Y. Liu, and T. Jiang, "Compact CPW-fed ultra-wide band antenna with dual band notched characteristics," IEICE Electronics Express, Vol. 7, No. 20, 1597–1601, 2010.
doi:10.1587/elex.7.1597 Google Scholar

10. Yang, Xiaodong, Yingsong Li, Chengyuan Liu, and Tao Jiang, "A SLEEVE MONOPOLE ANTENNA WITH WIDE IMPEDANCE BANDWIDTH FOR INDOOR BASE STATION APPLICATIONS," Progress In Electromagnetics Research C, Vol. 16, 223–232, 2010.
doi:10.2528/pierc10082102 Google Scholar

11. Sahay, Janardan, Dugyala Goutham, Tanweer, and Sanjay Kumar, "A novel compact ultrawide band filter for reconfigurable notches," Microwave and Optical Technology Letters, Vol. 57, No. 1, 88–91, November 2014.
doi:10.1002/mop.28784 Google Scholar

12. Mirzaee, M., S. Noghanian, and B.S. Virdee, "High selectivity UWB bandpass filter with controllable bandwidth of dual notch bands," Electronics Letters, Vol. 50, No. 19, 1358–1359, September 2014.
doi:10.1049/el.2014.2336 Google Scholar

13. Wei, Feng, Qiu Yi Wu, Xiao Wei Shi, and Li Chen, "Compact UWB Bandpass Filter With Dual Notched Bands Based on SCRLH Resonator," IEEE Microwave and Wireless Components Letters, Vol. 21, No. 1, 28–30, January 2011.
doi:10.1109/lmwc.2010.2088113 Google Scholar

Tao Jiang

Yanyan Wang

Xuemei Zheng