Compact microstrip coupled-line bandpass filter with four transmission zeros

Chao Huang Wu; Yo Shen Lin; Chi Hsueh Wang; Chun Hsiung Chen

doi:10.1109/LMWC.2005.855375

Compact microstrip coupled-line bandpass filter with four transmission zeros

Chao Huang Wu
, Yo Shen Lin
, Chi Hsueh Wang
, Chun Hsiung Chen

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

A compact coupled-line bandpass filter with multiple capacitive cross-couplings to create four transmission zeros is proposed. The locations of transmission zeros can be adjusted by varying the values of cross-coupled capacitances so as to improve the filter selectivity. The proposed filter is based on one-eighth-wavelength (λ/8) coupled-line sections and quarter-wavelength (λ/4) resonators, thus it occupies only half of the circuit area comparing with the conventional coupled-line bandpass filters. Specifically, a fourth-order microstrip coupled-line bandpass filter centered at 2.46 GHz with a 3-dB bandwidth of 10.2% and four transmission zeros is implemented and examined.

Original language	English
Pages (from-to)	579-581
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	15
Issue number	9
DOIs	https://doi.org/10.1109/LMWC.2005.855375
State	Published - Sep 2005

Keywords

Bandpass filter
Coupled-line
Microstrip
Multiple cross-couplings

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10.1109/LMWC.2005.855375

Cite this

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title = "Compact microstrip coupled-line bandpass filter with four transmission zeros",

abstract = "A compact coupled-line bandpass filter with multiple capacitive cross-couplings to create four transmission zeros is proposed. The locations of transmission zeros can be adjusted by varying the values of cross-coupled capacitances so as to improve the filter selectivity. The proposed filter is based on one-eighth-wavelength (λ/8) coupled-line sections and quarter-wavelength (λ/4) resonators, thus it occupies only half of the circuit area comparing with the conventional coupled-line bandpass filters. Specifically, a fourth-order microstrip coupled-line bandpass filter centered at 2.46 GHz with a 3-dB bandwidth of 10.2\% and four transmission zeros is implemented and examined.",

keywords = "Bandpass filter, Coupled-line, Microstrip, Multiple cross-couplings",

author = "Wu, \{Chao Huang\} and Lin, \{Yo Shen\} and Wang, \{Chi Hsueh\} and Chen, \{Chun Hsiung\}",

note = "Funding Information: Manuscript received February 7, 2005; revised May 6, 2005. This work was supported by the National Science Council of Taiwan under Grant NSC 93-2752-E-002-001-PAE and Grant NSC 93-2219-E-002-021. The review of this letter was arranged by Associate Editor M. Mrozowski.",

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AU - Wu, Chao Huang

AU - Lin, Yo Shen

AU - Wang, Chi Hsueh

AU - Chen, Chun Hsiung

N1 - Funding Information: Manuscript received February 7, 2005; revised May 6, 2005. This work was supported by the National Science Council of Taiwan under Grant NSC 93-2752-E-002-001-PAE and Grant NSC 93-2219-E-002-021. The review of this letter was arranged by Associate Editor M. Mrozowski.

PY - 2005/9

Y1 - 2005/9

N2 - A compact coupled-line bandpass filter with multiple capacitive cross-couplings to create four transmission zeros is proposed. The locations of transmission zeros can be adjusted by varying the values of cross-coupled capacitances so as to improve the filter selectivity. The proposed filter is based on one-eighth-wavelength (λ/8) coupled-line sections and quarter-wavelength (λ/4) resonators, thus it occupies only half of the circuit area comparing with the conventional coupled-line bandpass filters. Specifically, a fourth-order microstrip coupled-line bandpass filter centered at 2.46 GHz with a 3-dB bandwidth of 10.2% and four transmission zeros is implemented and examined.

AB - A compact coupled-line bandpass filter with multiple capacitive cross-couplings to create four transmission zeros is proposed. The locations of transmission zeros can be adjusted by varying the values of cross-coupled capacitances so as to improve the filter selectivity. The proposed filter is based on one-eighth-wavelength (λ/8) coupled-line sections and quarter-wavelength (λ/4) resonators, thus it occupies only half of the circuit area comparing with the conventional coupled-line bandpass filters. Specifically, a fourth-order microstrip coupled-line bandpass filter centered at 2.46 GHz with a 3-dB bandwidth of 10.2% and four transmission zeros is implemented and examined.

KW - Bandpass filter

KW - Coupled-line

KW - Microstrip

KW - Multiple cross-couplings

UR - https://www.scopus.com/pages/publications/27844529826

U2 - 10.1109/LMWC.2005.855375

DO - 10.1109/LMWC.2005.855375

M3 - 期刊論文

AN - SCOPUS:27844529826

SN - 1531-1309

VL - 15

SP - 579

EP - 581

JO - IEEE Microwave and Wireless Components Letters

JF - IEEE Microwave and Wireless Components Letters

IS - 9

ER -

Compact microstrip coupled-line bandpass filter with four transmission zeros

Abstract

Keywords

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