Design of Tri-Band Filters With Improved Band Allocation

A new design method for tri-band filters with improved band allocation is proposed. The design concept treats different band allocations with different methodologies. For the bands assigned to adjacent frequency regions, transmission zeros are introduced to split one of the single bands into two. Fo...

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Published inIEEE transactions on microwave theory and techniques Vol. 57; no. 7; pp. 1790 - 1797
Main Authors CHEN, Bo-Jiun, SHEN, Tze-Min, WU, Ruey-Beei
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.07.2009
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Allocations
Applied sciences
Band allocation
Band pass filters
Bands
Circuit properties
coupling matrix
Design methodology
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Filtering theory
GSM
Harmonics
Microwaves
Multiaccess communication
Open loop systems
Oscillators, resonators, synthetizers
Passband
Resonance
Resonant frequency
Resonator filters
Resonators
Simulation
stepped-impedance resonators (SIRs)
Harmonic
Resonator
stepped-impedance resonators (SIRs)
Simulation
Stepped impedance device
coupling matrix
Passband
Band allocation
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Abstract A new design method for tri-band filters with improved band allocation is proposed. The design concept treats different band allocations with different methodologies. For the bands assigned to adjacent frequency regions, transmission zeros are introduced to split one of the single bands into two. For the bands that are assigned separately, different harmonic modes of stepped-impedance resonators are used to realize different passbands. Two design examples with different responses and band allocations are given, and were verified by experiments, as well as full-wave simulation results.
AbstractList A new design method for tri-band filters with improved band allocation is proposed. The design concept treats different band allocations with different methodologies. For the bands assigned to adjacent frequency regions, transmission zeros are introduced to split one of the single bands into two. For the bands that are assigned separately, different harmonic modes of stepped-impedance resonators are used to realize different passbands. Two design examples with different responses and band allocations are given, and were verified by experiments, as well as full-wave simulation results.
Author Bo-Jiun Chen
Ruey-Beei Wu
Tze-Min Shen
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  fullname: SHEN, Tze-Min
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  givenname: Ruey-Beei
  surname: WU
  fullname: WU, Ruey-Beei
  organization: Department of Electrical Engineering and Graduate Institute of Communication Engineering, National Taiwan University, Taipei, 10617, Taiwan, Province of China
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stepped-impedance resonators (SIRs)
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coupling matrix
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SubjectTerms Allocations
Applied sciences
Band allocation
Band pass filters
Bands
Circuit properties
coupling matrix
Design methodology
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Filtering theory
GSM
Harmonics
Microwaves
Multiaccess communication
Open loop systems
Oscillators, resonators, synthetizers
Passband
Resonance
Resonant frequency
Resonator filters
Resonators
Simulation
stepped-impedance resonators (SIRs)
Title Design of Tri-Band Filters With Improved Band Allocation
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