DocumentCode :
1975244
Title :
Ultra-Wideband Microstrip-Line Bandpass Filters with Good Out-of-Band Performance using EBG-Embedded Multiple-Mode Resonator
Author :
Wong, Sai Wai ; Zhu, Lei ; Sun, Sheng
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
fYear :
2007
fDate :
11-14 Dec. 2007
Firstpage :
1
Lastpage :
4
Abstract :
A class of ultra-wideband microstrip-line bandpass filters with improved out-of-band performance and miniaturized size is proposed and constituted using electromagnetic-bandgap (EBG) embedded multiple-mode resonator (MMR). This EBG- embedded MMR is at first studied, aiming to relocate its first three resonant modes within the 3.1-10.6GHz UWB passband while inhibiting its 5th resonant mode in the upper frequency range. Moreover, the coupling zero of external coupled-lines is properly adjusted to cancel the excitation of the 4th resonator of this MMR. A single-stage bandpass filter is then investigated to initially demonstrate the improved UWB bandpass behavior. Afterwards, two- and three-stage bandpass filters are designed to further sharpen out-of-band rejection skirts and deepen lower/upper stopbands as required by FCC-defined UWB mask. Finally, three filter samples are fabricated and tested. It is shown that the measured results are well matched to the predicted ones in terms of insertion/return losses and group delay over the plotted frequency range of 1.0 to 20.0GHz.
Keywords :
band-pass filters; microstrip lines; strip line resonators; ultra wideband technology; UWB mask; UWB passband; bandpass filters; electromagnetic-bandgap; multiple-mode resonator; ultra wideband microstrip line; Band pass filters; Filtering theory; Frequency; Microstrip filters; Microstrip resonators; Passband; Resonance; Resonator filters; Testing; Ultra wideband technology; UWB bandpass filter; electromagnetic band-gap (EBG); multiple-mode resonator; out-of-band;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
Type :
conf
DOI :
10.1109/APMC.2007.4554766
Filename :
4554766
Link To Document :
بازگشت