DocumentCode :
2764185
Title :
A novel bandpass filter with sharp attenuations and wide stopband developed through the combined use of composite resonators and stepped impedance resonators
Author :
Miki, Hitoshi ; Ma, Zhewang ; Kobayashi, Yoshio
Author_Institution :
Saitama Univ., Saitama
fYear :
2006
fDate :
12-15 Dec. 2006
Firstpage :
1683
Lastpage :
1686
Abstract :
In this paper, a novel four-pole microstrip bandpass filter (BPF) with sharp attenuations and wide stopband is developed through a combined use of composite resonators and stepped impedance resonators (SIRs). By using a full-wave electromagnetic simulator, the filter is designed with a midband frequency of 1.0 GHz and a fractional bandwidth of 2%. The measured frequency response of the filter agrees well with the simulated result, and exhibits transmission zeros at about 0.9, 1.1, and 1.15 GHz, respectively. The transition from the passband to the stopband is thereby sharp and deep. The stopband with attenuations larger than 30 dB extends up to approximately 6.7 GHz, which is 6.7 times the midband frequency of the filter.
Keywords :
UHF filters; band-pass filters; band-stop filters; resonator filters; BPF; SIR; composite resonators; four-pole microstrip bandpass filter; frequency 1 GHz; full-wave electromagnetic simulator; sharp attenuations; stepped impedance resonators; wide stopband filter; Attenuation; Band pass filters; Bandwidth; Electromagnetic measurements; Frequency measurement; Frequency response; Impedance; Microstrip filters; Microstrip resonators; Resonator filters; Microstrip filter; composite resonator; stepped impedance resonator; transmission zero; wide stopband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
Type :
conf
DOI :
10.1109/APMC.2006.4429732
Filename :
4429732
Link To Document :
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