Compact dual-band filter design using crossly coupled λ/4 SIRs embedded with spur-line for WLAN applications

Pow Wen Chen; Min Hua Ho; Wanchu Hong

doi:10.1002/mop.23846

Compact dual-band filter design using crossly coupled λ/4 SIRs embedded with spur-line for WLAN applications

Pow Wen Chen, Min Hua Ho, Wanchu Hong

Graduate Institute of Communication Engineering

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

4 Citations (Scopus)

Abstract

This article presents a compact dual-band bandpass filter (BPF) design using λ/4 stepped impedance resonators (SIRs) embedded with spur-line for the WLAN applications. The filter covers both the operating frequencies of 2.45 GHz and 5.2-5.8 GHz. The crossly coupled mechanism is used in the filter design to provide attenuation poles by the passband edges for enhancing the signal selectivity and increasing stopband rejection levels. The tapped-line is incorporated in feed structure to save the circuit space. The spur-line is embedded in each I/O SIRs to push the upper stopband limit to a higher frequency. Experiments are conducted to verify the circuit performance. A good agreement is observed between the simulation and the measurement.

Original language	English
Pages (from-to)	2807-2810
Number of pages	4
Journal	Microwave and Optical Technology Letters
Volume	50
Issue number	11
DOIs	https://doi.org/10.1002/mop.23846
Publication status	Published - 2008 Nov 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Compact dual-band filter design using crossly coupled λ/4 SIRs embedded with spur-line for WLAN applications",

abstract = "This article presents a compact dual-band bandpass filter (BPF) design using λ/4 stepped impedance resonators (SIRs) embedded with spur-line for the WLAN applications. The filter covers both the operating frequencies of 2.45 GHz and 5.2-5.8 GHz. The crossly coupled mechanism is used in the filter design to provide attenuation poles by the passband edges for enhancing the signal selectivity and increasing stopband rejection levels. The tapped-line is incorporated in feed structure to save the circuit space. The spur-line is embedded in each I/O SIRs to push the upper stopband limit to a higher frequency. Experiments are conducted to verify the circuit performance. A good agreement is observed between the simulation and the measurement.",

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AB - This article presents a compact dual-band bandpass filter (BPF) design using λ/4 stepped impedance resonators (SIRs) embedded with spur-line for the WLAN applications. The filter covers both the operating frequencies of 2.45 GHz and 5.2-5.8 GHz. The crossly coupled mechanism is used in the filter design to provide attenuation poles by the passband edges for enhancing the signal selectivity and increasing stopband rejection levels. The tapped-line is incorporated in feed structure to save the circuit space. The spur-line is embedded in each I/O SIRs to push the upper stopband limit to a higher frequency. Experiments are conducted to verify the circuit performance. A good agreement is observed between the simulation and the measurement.

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