Printed Circuit Board Bandpass Filters with Octave Bandwidth and Very Wide Upper Stopband

Hui-Chun CHEN; Chi-Yang CHANG

doi:10.1093/ietele/e90-c.12.2205

Printed Circuit Board Bandpass Filters with Octave Bandwidth and Very Wide Upper Stopband

Hui-Chun CHEN, Chi-Yang CHANG

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Bandpass filters with broad bandwidth (up to 70%), very wide upper stopband (nearest spurious passband occurs up to five times of passband center frequency (f₀)), good stopband rejection performance (better than -30-40 dB in the whole stopband region), and matching with the conventional low cost printed circuit board process with low dielectric constant substrates are proposed in this paper. The proposed filters are designed using parallel-coupled vertically installed planar stepped-impedance resonators (VIPSIRs), which adopt the inherent nature of very tight coupling of VIP coupled line and extremely high impedance of VIP line. The extremely tightly coupled line enables the proposed filters having very wide passband and the extremely high impedance of VIP line leads to extremely large low-to-high impedance ratio that pushes the nearest spurious passband up to 5f₀. Both VIP coupled line and VIP high impedance line are analyzed and characterized by the design charts. The design procedures based on the design charts are verified by several experimental examples. The measured results agree very well with the simulated ones.

Publication: IEICE TRANSACTIONS on Electronics Vol.E90-C No.12 pp.2205-2211

Publication Date: 2007/12/01

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Online ISSN: 1745-1353

DOI: 10.1093/ietele/e90-c.12.2205

Type of Manuscript: Special Section PAPER (Special Section on Recent Technologies for Microwave and Millimeter-wave Passive Devices)

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Hui-Chun CHEN, Chi-Yang CHANG, "Printed Circuit Board Bandpass Filters with Octave Bandwidth and Very Wide Upper Stopband" in IEICE TRANSACTIONS on Electronics, vol. E90-C, no. 12, pp. 2205-2211, December 2007, doi: 10.1093/ietele/e90-c.12.2205.
Abstract: Bandpass filters with broad bandwidth (up to 70%), very wide upper stopband (nearest spurious passband occurs up to five times of passband center frequency (f₀)), good stopband rejection performance (better than -30-40 dB in the whole stopband region), and matching with the conventional low cost printed circuit board process with low dielectric constant substrates are proposed in this paper. The proposed filters are designed using parallel-coupled vertically installed planar stepped-impedance resonators (VIPSIRs), which adopt the inherent nature of very tight coupling of VIP coupled line and extremely high impedance of VIP line. The extremely tightly coupled line enables the proposed filters having very wide passband and the extremely high impedance of VIP line leads to extremely large low-to-high impedance ratio that pushes the nearest spurious passband up to 5f₀. Both VIP coupled line and VIP high impedance line are analyzed and characterized by the design charts. The design procedures based on the design charts are verified by several experimental examples. The measured results agree very well with the simulated ones.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e90-c.12.2205/_p

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@ARTICLE{e90-c_12_2205,
author={Hui-Chun CHEN, Chi-Yang CHANG, },
journal={IEICE TRANSACTIONS on Electronics},
title={Printed Circuit Board Bandpass Filters with Octave Bandwidth and Very Wide Upper Stopband},
year={2007},
volume={E90-C},
number={12},
pages={2205-2211},
abstract={Bandpass filters with broad bandwidth (up to 70%), very wide upper stopband (nearest spurious passband occurs up to five times of passband center frequency (f₀)), good stopband rejection performance (better than -30-40 dB in the whole stopband region), and matching with the conventional low cost printed circuit board process with low dielectric constant substrates are proposed in this paper. The proposed filters are designed using parallel-coupled vertically installed planar stepped-impedance resonators (VIPSIRs), which adopt the inherent nature of very tight coupling of VIP coupled line and extremely high impedance of VIP line. The extremely tightly coupled line enables the proposed filters having very wide passband and the extremely high impedance of VIP line leads to extremely large low-to-high impedance ratio that pushes the nearest spurious passband up to 5f₀. Both VIP coupled line and VIP high impedance line are analyzed and characterized by the design charts. The design procedures based on the design charts are verified by several experimental examples. The measured results agree very well with the simulated ones.},
keywords={},
doi={10.1093/ietele/e90-c.12.2205},
ISSN={1745-1353},
month={December},}

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TY - JOUR
TI - Printed Circuit Board Bandpass Filters with Octave Bandwidth and Very Wide Upper Stopband
T2 - IEICE TRANSACTIONS on Electronics
SP - 2205
EP - 2211
AU - Hui-Chun CHEN
AU - Chi-Yang CHANG
PY - 2007
DO - 10.1093/ietele/e90-c.12.2205
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E90-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2007
AB - Bandpass filters with broad bandwidth (up to 70%), very wide upper stopband (nearest spurious passband occurs up to five times of passband center frequency (f₀)), good stopband rejection performance (better than -30-40 dB in the whole stopband region), and matching with the conventional low cost printed circuit board process with low dielectric constant substrates are proposed in this paper. The proposed filters are designed using parallel-coupled vertically installed planar stepped-impedance resonators (VIPSIRs), which adopt the inherent nature of very tight coupling of VIP coupled line and extremely high impedance of VIP line. The extremely tightly coupled line enables the proposed filters having very wide passband and the extremely high impedance of VIP line leads to extremely large low-to-high impedance ratio that pushes the nearest spurious passband up to 5f₀. Both VIP coupled line and VIP high impedance line are analyzed and characterized by the design charts. The design procedures based on the design charts are verified by several experimental examples. The measured results agree very well with the simulated ones.
ER -