Title :
Notched ultra-wideband (UWB) bandpass filter with wide upper stopband based on electromagnetic bandgap (EBG) structures
Author :
Gao, Ming-Jian ; Wu, Lin-Sheng ; Mao, Junfa
Author_Institution :
Key Lab. of Minist. of Educ. for Res. of Design & EMC of High Speed Electron. Syst., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
In this paper, a new notched ultra-wideband (UWB) bandpass filter with wide upper stopband is proposed using electromagnetic bandgap (EBG) structures. The design of the UWB filter is started from a stepped-impedance stub-loaded resonator, which works as a multiple-mode resonator (MMR) and provides a UWB passband with sharp side slopes. Then, EBG-loaded lines are incorporated into the resonator to suppress the spurious responses above the passband. In order to introduce a notch for WLAN application of 5.2 GHz, a folded stepped-impedance resonator is located near to the stub of MMR. It has been demonstrated by the simulated and measured results that our proposed UWB filter has the performances of UWB passband with good frequency selectivity, narrow notched band and very wide upper stopband, simultaneously.
Keywords :
band-pass filters; notch filters; photonic band gap; ultra wideband technology; wireless LAN; EBG-loaded lines; UWB filter; WLAN; electromagnetic bandgap structures; frequency 5.2 GHz; multiple-mode resonator; notched ultra-wideband bandpass filter; stepped-impedance stub-loaded resonator; Band pass filters; Filtering theory; Metamaterials; Passband; Periodic structures; Resonator filters; Ultra wideband technology;
Conference_Titel :
Microwave and Millimeter Wave Technology (ICMMT), 2012 International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-2184-6
DOI :
10.1109/ICMMT.2012.6230024
