DocumentCode :
3169975
Title :
Design of the band-pass filter with wide stopband performance using λ/4 forked SIRs
Author :
Lin, Wei-Chen ; Ho, Min-Hua
Author_Institution :
Grad. Inst. of Commun. Eng., Nat. Changhua Univ. of Educ., Changhua, Taiwan
fYear :
2009
fDate :
7-10 Dec. 2009
Firstpage :
1380
Lastpage :
1382
Abstract :
In this paper, a band-pass filter (BPF) using forked stepped-impedance resonators (SIRs) was proposed with having a very wide stopband performance. The circuit composed of two forked SIRs connected with a narrow microstrip with the latter´s middle point shorting to the ground through a via hole. The FSIRs filter operated under a quarter-wavelength resonance condition. The filter was built for WLAN IEEE 802.11b/g (2.4/2.45 GHz) applications. A long narrow coupled microstrip which increasing the stopband range was used to couple I/O signal to/from the resonators. The upper stopband, its frequency range was measured from 2.76 to 23.08 GHz with the criterion of the signal rejection levels greater than 20 dB. The stopband´s upper-end is over 9.5 f0 with the central frequency of 2.44 GHz. Experiment was conducted and a good agreement was observed between the measurement and simulation.
Keywords :
band-pass filters; band-stop filters; resonator filters; wireless LAN; WLAN IEEE 802.11; band-pass filter; forked stepped-impedance resonators; frequency 2.4 GHz; frequency 2.45 GHz; quarter-wavelength resonance condition; stopband filter; BPF; WLAN; forked SIR; quarter-wavelength resonance; wide stopband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
Type :
conf
DOI :
10.1109/APMC.2009.5384493
Filename :
5384493
Link To Document :
بازگشت