Resonant-Mode Characteristics of a New Three-Mode Hybrid Microstrip/Slotline Resonator and Novel Realization of Compact Bandpass Filter with Four Transmission Zeros

Masataka OHIRA; Zhewang MA

doi:10.1587/transele.E95.C.1203

Resonant-Mode Characteristics of a New Three-Mode Hybrid Microstrip/Slotline Resonator and Novel Realization of Compact Bandpass Filter with Four Transmission Zeros

Masataka OHIRA, Zhewang MA

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This paper proposes a new three-mode resonator, which consists of a parallel-coupled microstrip line resonator embedded with a slotline resonator, and develops a compact low-loss bandpass filter (BPF) with a sharp roll-off response because of four transmission zeros (TZ) located very near the passband. Resonance mechanism and properties of the three modes are first analyzed by using an eigen-mode analysis, and then an equivalent circuit model is established for expressing a novel coupling scheme of the developed BPF. It is made clear from the results of circuit analysis that the four TZs are produced because of multiple paths between the input/output stub lines formed by the three resonant modes and the direct source/load coupling. The validity of the proposed resonator and filter is supported by the comparison between simulated and measured results.

Publication: IEICE TRANSACTIONS on Electronics Vol.E95-C No.7 pp.1203-1210

Publication Date: 2012/07/01

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Online ISSN: 1745-1353

DOI: 10.1587/transele.E95.C.1203

Type of Manuscript: Special Section PAPER (Special Section on Recent Trends of Microwave Systems and Their Fundamental Technologies)

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Masataka OHIRA, Zhewang MA, "Resonant-Mode Characteristics of a New Three-Mode Hybrid Microstrip/Slotline Resonator and Novel Realization of Compact Bandpass Filter with Four Transmission Zeros" in IEICE TRANSACTIONS on Electronics, vol. E95-C, no. 7, pp. 1203-1210, July 2012, doi: 10.1587/transele.E95.C.1203.
Abstract: This paper proposes a new three-mode resonator, which consists of a parallel-coupled microstrip line resonator embedded with a slotline resonator, and develops a compact low-loss bandpass filter (BPF) with a sharp roll-off response because of four transmission zeros (TZ) located very near the passband. Resonance mechanism and properties of the three modes are first analyzed by using an eigen-mode analysis, and then an equivalent circuit model is established for expressing a novel coupling scheme of the developed BPF. It is made clear from the results of circuit analysis that the four TZs are produced because of multiple paths between the input/output stub lines formed by the three resonant modes and the direct source/load coupling. The validity of the proposed resonator and filter is supported by the comparison between simulated and measured results.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.E95.C.1203/_p

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@ARTICLE{e95-c_7_1203,
author={Masataka OHIRA, Zhewang MA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Resonant-Mode Characteristics of a New Three-Mode Hybrid Microstrip/Slotline Resonator and Novel Realization of Compact Bandpass Filter with Four Transmission Zeros},
year={2012},
volume={E95-C},
number={7},
pages={1203-1210},
abstract={This paper proposes a new three-mode resonator, which consists of a parallel-coupled microstrip line resonator embedded with a slotline resonator, and develops a compact low-loss bandpass filter (BPF) with a sharp roll-off response because of four transmission zeros (TZ) located very near the passband. Resonance mechanism and properties of the three modes are first analyzed by using an eigen-mode analysis, and then an equivalent circuit model is established for expressing a novel coupling scheme of the developed BPF. It is made clear from the results of circuit analysis that the four TZs are produced because of multiple paths between the input/output stub lines formed by the three resonant modes and the direct source/load coupling. The validity of the proposed resonator and filter is supported by the comparison between simulated and measured results.},
keywords={},
doi={10.1587/transele.E95.C.1203},
ISSN={1745-1353},
month={July},}

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TY - JOUR
TI - Resonant-Mode Characteristics of a New Three-Mode Hybrid Microstrip/Slotline Resonator and Novel Realization of Compact Bandpass Filter with Four Transmission Zeros
T2 - IEICE TRANSACTIONS on Electronics
SP - 1203
EP - 1210
AU - Masataka OHIRA
AU - Zhewang MA
PY - 2012
DO - 10.1587/transele.E95.C.1203
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E95-C
IS - 7
JA - IEICE TRANSACTIONS on Electronics
Y1 - July 2012
AB - This paper proposes a new three-mode resonator, which consists of a parallel-coupled microstrip line resonator embedded with a slotline resonator, and develops a compact low-loss bandpass filter (BPF) with a sharp roll-off response because of four transmission zeros (TZ) located very near the passband. Resonance mechanism and properties of the three modes are first analyzed by using an eigen-mode analysis, and then an equivalent circuit model is established for expressing a novel coupling scheme of the developed BPF. It is made clear from the results of circuit analysis that the four TZs are produced because of multiple paths between the input/output stub lines formed by the three resonant modes and the direct source/load coupling. The validity of the proposed resonator and filter is supported by the comparison between simulated and measured results.
ER -