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Title: Design of the Band-Pass Filter with Wide Stopband Performance Using λ/4 Forked SIRs
Authors: Lin, Wei-Chen;Ho, Min-Hua
Contributors: 電子工程學系
Date: 2009-12
Issue Date: 2012-05-22T06:28:02Z
Publisher: IEEE
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.
Relation: Asia-Pacific Microwave Conference (APMC'09), Singapore, Dec. 7-10, 2009
Appears in Collections:[電子工程學系] 會議論文

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