Design of dual-band bandpass filter incorporating tri-section SIRs and CPW SIRs

Ching Her Lee; Chung I.G. Hsu; Yu Cheng Chen

Design of dual-band bandpass filter incorporating tri-section SIRs and CPW SIRs

Ching Her Lee, Chung I.G. Hsu, Yu Cheng Chen

Graduate Institute of Communication Engineering

Research output: Contribution to journal › Article

Abstract

A dual-band microstrip bandpass filter (BPF) designed using half-wavelength (λ/2) tri-section microstrip steppedimpedance resonators (TSSIRs) and quarter-wavelength (λ/4) coplanar-waveguide (CPW) stepped-impedance resonators (SIRs) is presented. The center frequencies of the passbands are located at commercially practical frequencies (2.45 and 5.25 GHz) for wireless local-area network (WLAN) applications. A pair of TSSIRs in the top layer of the BPF provides a path for the 2.45 and 5.25 GHz signals, and a pair of CPW SIRs in the ground layer furnishes a path for the 5.25 GHz signal. All these resonators are coupled by microstrip feed lines. For passband selectivity improvement, a cross-coupling path is established by connecting an anti-parallelcoupled line section to the ends of the input and output feed lines to form the source-load coupling.

Original language	English
Pages (from-to)	13-18
Number of pages	6
Journal	Journal of Microwaves and Optoelectronics
Volume	8
Issue number	1
Publication status	Published - 2009 Jun 1

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

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Lee, C. H., Hsu, C. I. G., & Chen, Y. C. (2009). Design of dual-band bandpass filter incorporating tri-section SIRs and CPW SIRs. Journal of Microwaves and Optoelectronics, 8(1), 13-18.

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title = "Design of dual-band bandpass filter incorporating tri-section SIRs and CPW SIRs",

abstract = "A dual-band microstrip bandpass filter (BPF) designed using half-wavelength (λ/2) tri-section microstrip steppedimpedance resonators (TSSIRs) and quarter-wavelength (λ/4) coplanar-waveguide (CPW) stepped-impedance resonators (SIRs) is presented. The center frequencies of the passbands are located at commercially practical frequencies (2.45 and 5.25 GHz) for wireless local-area network (WLAN) applications. A pair of TSSIRs in the top layer of the BPF provides a path for the 2.45 and 5.25 GHz signals, and a pair of CPW SIRs in the ground layer furnishes a path for the 5.25 GHz signal. All these resonators are coupled by microstrip feed lines. For passband selectivity improvement, a cross-coupling path is established by connecting an anti-parallelcoupled line section to the ends of the input and output feed lines to form the source-load coupling.",

author = "Lee, {Ching Her} and Hsu, {Chung I.G.} and Chen, {Yu Cheng}",

year = "2009",

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AU - Lee, Ching Her

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N2 - A dual-band microstrip bandpass filter (BPF) designed using half-wavelength (λ/2) tri-section microstrip steppedimpedance resonators (TSSIRs) and quarter-wavelength (λ/4) coplanar-waveguide (CPW) stepped-impedance resonators (SIRs) is presented. The center frequencies of the passbands are located at commercially practical frequencies (2.45 and 5.25 GHz) for wireless local-area network (WLAN) applications. A pair of TSSIRs in the top layer of the BPF provides a path for the 2.45 and 5.25 GHz signals, and a pair of CPW SIRs in the ground layer furnishes a path for the 5.25 GHz signal. All these resonators are coupled by microstrip feed lines. For passband selectivity improvement, a cross-coupling path is established by connecting an anti-parallelcoupled line section to the ends of the input and output feed lines to form the source-load coupling.

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