Novel Centrally Loaded Resonators and Their Applications to Bandpass Filters

This paper presents several novel centrally loaded resonators and their applications to various types of bandpass filters. Based on the theoretical analysis, it is found that the even- mode resonance of the proposed resonators can be conveniently controlled without affecting the responses at the odd...

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Published inIEEE transactions on microwave theory and techniques Vol. 56; no. 4; pp. 913 - 921
Main Authors Xiu Yin Zhang, Xiu Yin Zhang, Quan Xue, Quan Xue
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.04.2008
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
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Abstract This paper presents several novel centrally loaded resonators and their applications to various types of bandpass filters. Based on the theoretical analysis, it is found that the even- mode resonance of the proposed resonators can be conveniently controlled without affecting the responses at the odd-mode resonant frequencies. Benefiting from this feature, the resonator can be utilized to design not only harmonic-suppressed bandpass filters and dual-band bandpass filters but also tunable bandpass filters. The tunable filter offers a fixed passband and a tunable one. The center frequency of the upper passband can be electrically tuned, whereas the performance of the lower one is maintained constant. To demonstrate these applications, four filters using the proposed resonators are implemented. The experiments verify the theoretical predictions and simulations.
AbstractList This paper presents several novel centrally loaded resonators and their applications to various types of bandpass filters. Based on the theoretical analysis, it is found that the even- mode resonance of the proposed resonators can be conveniently controlled without affecting the responses at the odd-mode resonant frequencies. Benefiting from this feature, the resonator can be utilized to design not only harmonic-suppressed bandpass filters and dual-band bandpass filters but also tunable bandpass filters. The tunable filter offers a fixed passband and a tunable one. The center frequency of the upper passband can be electrically tuned, whereas the performance of the lower one is maintained constant. To demonstrate these applications, four filters using the proposed resonators are implemented. The experiments verify the theoretical predictions and simulations.
Author Xiu Yin Zhang
Quan Xue
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Keywords Performance evaluation
Tunable circuit
Resonator
tunable filters
harmonic suppression
Bandpass filters
dual-band filters
Implementation
Harmonics suppression
Simulation
centrally loaded resonators
Tunable filter
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SubjectTerms Applied sciences
Band pass filters
Bandpass filters
centrally loaded resonators
Circuit properties
Design engineering
Dual band
dual-band filters
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Frequency filters
harmonic suppression
Harmonics suppression
Microwave filters
Microwaves
Oscillators, resonators, synthetizers
Passband
Predictive models
Resonance
Resonant frequencies
Resonant frequency
Resonator filters
Resonators
Simulation
Tunable circuits and devices
Tunable filters
Title Novel Centrally Loaded Resonators and Their Applications to Bandpass Filters
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