Design of a New Bandpass Filter Using Anti-Parallel Coupled Asymmetric SIRs

Ching-Her LEE; Chung-I G. HSU; He-Kai JHUANG

doi:10.1093/ietele/e89-c.4.571

Design of a New Bandpass Filter Using Anti-Parallel Coupled Asymmetric SIRs

Ching-Her LEE, Chung-I G. HSU, He-Kai JHUANG

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In this paper a newly designed internally-coupled asymmetric stepped-impedance resonator (SIR) bandpass filter (BPF) is proposed. The asymmetric SIR structure not only can effectively reduce the circuit size but also can provide two flexibly tunable transmission zeros near the lower and upper passband edges. The first transmission zero is due to the series resonance of the quarter-wavelength open stepped-impedance stub, and the second one is produced by anti-parallel coupling between adjacent SIRs. The proposed BPF was fabricated and simulated using the commercial software HFSS, and agreement between the measured and simulated results was observed. A 0.9-dB insertion loss and a shape factor of 3.6 were achieved in the passband, thus indicating that the proposed filter structure is of practical value.

Publication: IEICE TRANSACTIONS on Electronics Vol.E89-C No.4 pp.571-575

Publication Date: 2006/04/01

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Online ISSN: 1745-1353

DOI: 10.1093/ietele/e89-c.4.571

Type of Manuscript: LETTER

Category: Electronic Circuits

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Ching-Her LEE, Chung-I G. HSU, He-Kai JHUANG, "Design of a New Bandpass Filter Using Anti-Parallel Coupled Asymmetric SIRs" in IEICE TRANSACTIONS on Electronics, vol. E89-C, no. 4, pp. 571-575, April 2006, doi: 10.1093/ietele/e89-c.4.571.
Abstract: In this paper a newly designed internally-coupled asymmetric stepped-impedance resonator (SIR) bandpass filter (BPF) is proposed. The asymmetric SIR structure not only can effectively reduce the circuit size but also can provide two flexibly tunable transmission zeros near the lower and upper passband edges. The first transmission zero is due to the series resonance of the quarter-wavelength open stepped-impedance stub, and the second one is produced by anti-parallel coupling between adjacent SIRs. The proposed BPF was fabricated and simulated using the commercial software HFSS, and agreement between the measured and simulated results was observed. A 0.9-dB insertion loss and a shape factor of 3.6 were achieved in the passband, thus indicating that the proposed filter structure is of practical value.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e89-c.4.571/_p

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@ARTICLE{e89-c_4_571,
author={Ching-Her LEE, Chung-I G. HSU, He-Kai JHUANG, },
journal={IEICE TRANSACTIONS on Electronics},
title={Design of a New Bandpass Filter Using Anti-Parallel Coupled Asymmetric SIRs},
year={2006},
volume={E89-C},
number={4},
pages={571-575},
abstract={In this paper a newly designed internally-coupled asymmetric stepped-impedance resonator (SIR) bandpass filter (BPF) is proposed. The asymmetric SIR structure not only can effectively reduce the circuit size but also can provide two flexibly tunable transmission zeros near the lower and upper passband edges. The first transmission zero is due to the series resonance of the quarter-wavelength open stepped-impedance stub, and the second one is produced by anti-parallel coupling between adjacent SIRs. The proposed BPF was fabricated and simulated using the commercial software HFSS, and agreement between the measured and simulated results was observed. A 0.9-dB insertion loss and a shape factor of 3.6 were achieved in the passband, thus indicating that the proposed filter structure is of practical value.},
keywords={},
doi={10.1093/ietele/e89-c.4.571},
ISSN={1745-1353},
month={April},}

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TY - JOUR
TI - Design of a New Bandpass Filter Using Anti-Parallel Coupled Asymmetric SIRs
T2 - IEICE TRANSACTIONS on Electronics
SP - 571
EP - 575
AU - Ching-Her LEE
AU - Chung-I G. HSU
AU - He-Kai JHUANG
PY - 2006
DO - 10.1093/ietele/e89-c.4.571
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E89-C
IS - 4
JA - IEICE TRANSACTIONS on Electronics
Y1 - April 2006
AB - In this paper a newly designed internally-coupled asymmetric stepped-impedance resonator (SIR) bandpass filter (BPF) is proposed. The asymmetric SIR structure not only can effectively reduce the circuit size but also can provide two flexibly tunable transmission zeros near the lower and upper passband edges. The first transmission zero is due to the series resonance of the quarter-wavelength open stepped-impedance stub, and the second one is produced by anti-parallel coupling between adjacent SIRs. The proposed BPF was fabricated and simulated using the commercial software HFSS, and agreement between the measured and simulated results was observed. A 0.9-dB insertion loss and a shape factor of 3.6 were achieved in the passband, thus indicating that the proposed filter structure is of practical value.
ER -