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New compact quad-passband bandpass filter based on multi-layer substrate technique

Published online by Cambridge University Press:  14 July 2014

Hung-Wei Wu  and
Shih-Hua Huang
Hung-Wei Wu*
Affiliation:
Department of Computer and Communication, Kun Shan University, Taiwan. Phone: +886-6-2051237
Shih-Hua Huang
Affiliation:
Department of Computer and Communication, Kun Shan University, Taiwan. Phone: +886-6-2051237
*
Corresponding author: H.-W. Wu, Email: hwwu@mail.ksu.edu.tw
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Abstract

A new compact quad-passband bandpass filter (BPF) using multi-mode resonators (MMRs) based on multi-layered substrate technique is proposed. The filter consists of a pair of multi-mode resonators (uniform impedance resonator and stepped impedance resonator) operated at 1.8/3.7 GHz on top layer and the other pair of the multi-mode resonators operated at 2.4/3 GHz on bottom layer. Source–load coupling lines are used to be the input/output (I/O) ports for providing the multi-paths propagations by cross-coupling effects in the filter. Specifically, the operated frequencies of the filter at 1.8/2.4/3/3.7 GHz with bandwidths of 6.7, 8.2, 4.6, and 7.2% are successfully designed and implemented. The proposed filter is useful for the multi-passband filters design, especially when the passbands are needed to be very close.

Keywords

Quad-passbandStepped impedance resonator (SIR)Source–load couplingBandpass filter
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 7 , Issue 6 , December 2015 , pp. 679 - 683
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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References

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