A parallel doubly coupled dual-band bandpass filter

Chen Mao Rao, Tzu Jung Wong, Min Hua Ho

Research output: Contribution to journalConference article

15 Citations (Scopus)

Abstract

A parallel doubly coupled stepped impedance resonators (SIRs) structure is proposed in this paper to build a 2.4/5.2 GHz dual-band bandpass filter for a WLAN application. The prototype filter is a three-stage design composed by four SIRs in conjunction with the tapped-line used in the I/O ports to create zeros by the passband skirts. The proposed filter has the advantages of a much wider fractional bandwidth in both the passbands without sacrificing the passband's insertion losses. The conventional parallel-coupled microstrip line model is applicable in the proposed filter design. The filter has obtained almost twice wider bandwidth compared to that possessed by the counterpart filter of a conventional parallel-coupled line configuration. It is convinced that this filter design can be apply to the 2.4/5-GHz dual-band operation that needs a wider second passband. The experiment is conducted for filter performance validation. A very good agreement is observed between the simulation and the measurements.

Original languageEnglish
Article number4014947
Pages (from-to)511-514
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
DOIs
Publication statusPublished - 2006 Dec 1
Event2006 IEEE MTT-S International Microwave Symposium Digest - San Francisco, CA, United States
Duration: 2006 Jun 112006 Jun 16

Fingerprint

Bandpass filters
bandpass filters
filters
Resonators
Bandwidth
Microstrip lines
Insertion losses
Wireless local area networks (WLAN)
resonators
impedance
skirts
bandwidth
insertion loss
Experiments
prototypes
configurations
simulation

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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abstract = "A parallel doubly coupled stepped impedance resonators (SIRs) structure is proposed in this paper to build a 2.4/5.2 GHz dual-band bandpass filter for a WLAN application. The prototype filter is a three-stage design composed by four SIRs in conjunction with the tapped-line used in the I/O ports to create zeros by the passband skirts. The proposed filter has the advantages of a much wider fractional bandwidth in both the passbands without sacrificing the passband's insertion losses. The conventional parallel-coupled microstrip line model is applicable in the proposed filter design. The filter has obtained almost twice wider bandwidth compared to that possessed by the counterpart filter of a conventional parallel-coupled line configuration. It is convinced that this filter design can be apply to the 2.4/5-GHz dual-band operation that needs a wider second passband. The experiment is conducted for filter performance validation. A very good agreement is observed between the simulation and the measurements.",
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A parallel doubly coupled dual-band bandpass filter. / Rao, Chen Mao; Wong, Tzu Jung; Ho, Min Hua.

In: IEEE MTT-S International Microwave Symposium Digest, 01.12.2006, p. 511-514.

Research output: Contribution to journalConference article

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