A Design Method of Multimode Multiband Bandpass Filters

Pengyu Ma; Bin Wei; Jia-Sheng Hong; Zhan Xu; Xubo Guo; Bisong Cao; Linan Jiang

doi:10.1109/TMTT.2018.2815682

A Design Method of Multimode Multiband Bandpass Filters

Pengyu Ma, Bin Wei, Jia-Sheng Hong, Zhan Xu, Xubo Guo, Bisong Cao, Linan Jiang

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Abstract

In this paper, a general design method for multiband filters is proposed. First, the frequency and element transformations from a low-pass prototype filter to a practical multiband bandpass filter is derived. Afterwards, formulas for extracting the coupling coefficient k between coupled multimode resonators and the external quality factor Qe are also obtained. Thereafter, the design procedure of coupled multiresonator multiband filters is similar to that of single-band filters. A tri-band microstrip filter with tri-mode resonators is successfully designed with the proposed method and fabricated, which validates this theory.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	IEEE Transactions on Microwave Theory and Techniques
Early online date	29 Mar 2018
DOIs	https://doi.org/10.1109/TMTT.2018.2815682
Publication status	E-pub ahead of print - 29 Mar 2018

Keywords

Chebyshev filters
coupling matrix for filter synthesis
Couplings
frequency transformation
Microwave theory and techniques
multibandpass filters
multimode resonators.
Prototypes
Resonant frequency
Resonators
Topology

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TMTT.2018.2815682

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abstract = "In this paper, a general design method for multiband filters is proposed. First, the frequency and element transformations from a low-pass prototype filter to a practical multiband bandpass filter is derived. Afterwards, formulas for extracting the coupling coefficient k between coupled multimode resonators and the external quality factor Qe are also obtained. Thereafter, the design procedure of coupled multiresonator multiband filters is similar to that of single-band filters. A tri-band microstrip filter with tri-mode resonators is successfully designed with the proposed method and fabricated, which validates this theory.",

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AU - Wei, Bin

AU - Hong, Jia-Sheng

AU - Xu, Zhan

AU - Guo, Xubo

AU - Cao, Bisong

AU - Jiang, Linan

PY - 2018/3/29

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N2 - In this paper, a general design method for multiband filters is proposed. First, the frequency and element transformations from a low-pass prototype filter to a practical multiband bandpass filter is derived. Afterwards, formulas for extracting the coupling coefficient k between coupled multimode resonators and the external quality factor Qe are also obtained. Thereafter, the design procedure of coupled multiresonator multiband filters is similar to that of single-band filters. A tri-band microstrip filter with tri-mode resonators is successfully designed with the proposed method and fabricated, which validates this theory.

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KW - Chebyshev filters

KW - coupling matrix for filter synthesis

KW - Couplings

KW - frequency transformation

KW - Microwave theory and techniques

KW - multibandpass filters

KW - multimode resonators.

KW - Prototypes

KW - Resonant frequency

KW - Resonators

KW - Topology

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A Design Method of Multimode Multiband Bandpass Filters

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Keywords

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