Design of Compact and Sharp-Rejection Ultra Wideband Bandpass Filters Using Interdigital Stepped-Impedance Resonators

Cheng-Yuan HUNG; Min-Hang WENG; Yan-Kuin SU; Ru-Yuan YANG; Hung-Wei WU

doi:10.1093/ietele/e90-c.8.1652

Design of Compact and Sharp-Rejection Ultra Wideband Bandpass Filters Using Interdigital Stepped-Impedance Resonators

Cheng-Yuan HUNG, Min-Hang WENG, Yan-Kuin SU, Ru-Yuan YANG, Hung-Wei WU

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In this paper, a compact ultra-wideband bandpass filter (UWB-BPF) using pseudo-interdigital stepped-impedance resonators (PIDT-SIRs) is designed and implemented on a commercial printed circuit board (PCB) of RT/Duroid 5880 substrate. The first two resonant modes of the SIR are coupled together and they are applied to create a wide passband. The proposed filter at center frequency f₀ of 7.1 GHz has very good measured characteristics including the bandwidth of 3.68-10.46 GHz (3-dB fractional bandwidth of 95%), low insertion loss of -0.50.4 dB, sharp rejection due to two transmission zeros in the passband edge created by the inter-stage coupling. Experimental results of the fabricated filter show a good agreement with the predicted results.

Publication: IEICE TRANSACTIONS on Electronics Vol.E90-C No.8 pp.1652-1654

Publication Date: 2007/08/01

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Online ISSN: 1745-1353

DOI: 10.1093/ietele/e90-c.8.1652

Type of Manuscript: LETTER

Category: Microwaves, Millimeter-Waves

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Cheng-Yuan HUNG, Min-Hang WENG, Yan-Kuin SU, Ru-Yuan YANG, Hung-Wei WU, "Design of Compact and Sharp-Rejection Ultra Wideband Bandpass Filters Using Interdigital Stepped-Impedance Resonators" in IEICE TRANSACTIONS on Electronics, vol. E90-C, no. 8, pp. 1652-1654, August 2007, doi: 10.1093/ietele/e90-c.8.1652.
Abstract: In this paper, a compact ultra-wideband bandpass filter (UWB-BPF) using pseudo-interdigital stepped-impedance resonators (PIDT-SIRs) is designed and implemented on a commercial printed circuit board (PCB) of RT/Duroid 5880 substrate. The first two resonant modes of the SIR are coupled together and they are applied to create a wide passband. The proposed filter at center frequency f₀ of 7.1 GHz has very good measured characteristics including the bandwidth of 3.68-10.46 GHz (3-dB fractional bandwidth of 95%), low insertion loss of -0.50.4 dB, sharp rejection due to two transmission zeros in the passband edge created by the inter-stage coupling. Experimental results of the fabricated filter show a good agreement with the predicted results.
URL: https://globals.ieice.org/en_transactions/electronics/10.1093/ietele/e90-c.8.1652/_p

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@ARTICLE{e90-c_8_1652,
author={Cheng-Yuan HUNG, Min-Hang WENG, Yan-Kuin SU, Ru-Yuan YANG, Hung-Wei WU, },
journal={IEICE TRANSACTIONS on Electronics},
title={Design of Compact and Sharp-Rejection Ultra Wideband Bandpass Filters Using Interdigital Stepped-Impedance Resonators},
year={2007},
volume={E90-C},
number={8},
pages={1652-1654},
abstract={In this paper, a compact ultra-wideband bandpass filter (UWB-BPF) using pseudo-interdigital stepped-impedance resonators (PIDT-SIRs) is designed and implemented on a commercial printed circuit board (PCB) of RT/Duroid 5880 substrate. The first two resonant modes of the SIR are coupled together and they are applied to create a wide passband. The proposed filter at center frequency f₀ of 7.1 GHz has very good measured characteristics including the bandwidth of 3.68-10.46 GHz (3-dB fractional bandwidth of 95%), low insertion loss of -0.50.4 dB, sharp rejection due to two transmission zeros in the passband edge created by the inter-stage coupling. Experimental results of the fabricated filter show a good agreement with the predicted results.},
keywords={},
doi={10.1093/ietele/e90-c.8.1652},
ISSN={1745-1353},
month={August},}

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TY - JOUR
TI - Design of Compact and Sharp-Rejection Ultra Wideband Bandpass Filters Using Interdigital Stepped-Impedance Resonators
T2 - IEICE TRANSACTIONS on Electronics
SP - 1652
EP - 1654
AU - Cheng-Yuan HUNG
AU - Min-Hang WENG
AU - Yan-Kuin SU
AU - Ru-Yuan YANG
AU - Hung-Wei WU
PY - 2007
DO - 10.1093/ietele/e90-c.8.1652
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E90-C
IS - 8
JA - IEICE TRANSACTIONS on Electronics
Y1 - August 2007
AB - In this paper, a compact ultra-wideband bandpass filter (UWB-BPF) using pseudo-interdigital stepped-impedance resonators (PIDT-SIRs) is designed and implemented on a commercial printed circuit board (PCB) of RT/Duroid 5880 substrate. The first two resonant modes of the SIR are coupled together and they are applied to create a wide passband. The proposed filter at center frequency f₀ of 7.1 GHz has very good measured characteristics including the bandwidth of 3.68-10.46 GHz (3-dB fractional bandwidth of 95%), low insertion loss of -0.50.4 dB, sharp rejection due to two transmission zeros in the passband edge created by the inter-stage coupling. Experimental results of the fabricated filter show a good agreement with the predicted results.
ER -