This paper introduces a novel approach to create notch band filters in the front-end of ultra-wideband (UWB) communication systems based on electromagnetic bandgap (EBG) structures. The concept presented here can be implemented in any structure that has a microstrip in its configuration. The EBG structure is first analyzed using a full wave electromagnetic solver and then optimized to work at WLAN band (5.15–5.825 GHz). Two UWB passband filters are used to demonstrate the applicability and effectiveness of the novel EBG notch band feature. Simulation results are provided for two cases studied.
References
[1]
Sievenpiper, D; Zhang, L; Broas, RFJ; Alexopolous, NG; Yablonovitch, E. High-impedance electromagnetic surfaces with a forbidden frequency band. IEEE Trans. Microwave Theory？1999, 47, 2059–2073.
Kamgaing, T; Ramahi, OM. Design and modeling of high-impedance electromagnetic surfaces for switching noise suppression in power planes. IEEE Trans. Electromagn. Compat？2005, 47, 479–489.
[4]
Firoozbakhsh, B; Pratt, TG; Jayant, N. Analysis of IEEE 802.11a Interference on UWB Systems. Proceedings of IEEE Conference on Ultra Wideband Systems and Technologies, Atlanta, GA, USA, November 2003; pp. 473–477.
[5]
Horii, Y. A Compact Band Elimination Filter Composed of a Mushroom Resonator Embedded in Microstrip Line Substrate. Proceedings of IEEE Microwave Conference, AMPC, Hong Kong, China, July 2005.
[6]
Li, K. Ultra-wide (UWB) Bandpass Filters: Full Passband and with Notch-band Implemented. IEEE Conference on Microwave and Millimetre Wave Technology, Guangxi, China, April 18–21, 2007.
[7]
Hsiao, PY; Weng, RM. A compact ultra-wideband bandpass filter with WLAN notch band. Microw. Opt. Tech. Lett？2009, 51, 503–506.
[8]
Kim, KH; Cho, YJ; Hwang, SH; Park, SO. A Band-Rejected UWB Planar Monopole Antenna with a Ring-Shaped Parasitic Patch. IEEE Microwave Conference Proceedings, AMPC, Suzhou, China, December 4–7, 2005.
[9]
Microwave Studio. Available online: www.cst.com (accessed on 15 October 2010).
