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Compact dual-band bandpass filter using open stub-loaded stepped impedance resonator with cross-slots

Published online by Cambridge University Press:  13 January 2016

Bukuru Denis
Affiliation:
EHF Key Laboratory of Fundamental Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Kaijun Song
Affiliation:
EHF Key Laboratory of Fundamental Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Fan Zhang
Affiliation:
EHF Key Laboratory of Fundamental Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Corresponding
E-mail address:

Abstract

A compact dual-band bandpass filter using stub-loaded stepped impedance resonator (SLSIR) with cross-slots is presented. The symmetric SLSIR is analyzed using even- and odd-mode techniques. Design equations are derived and they are used to guide the design of the circuits. Two passbands can be easily tuned by cross-slots and open stubs. Transmission zeros among each passbands are created, resulting in high isolation and frequency selectivity. An experimental circuit is fabricated and evaluated to validate the design concept. The fabricated filter is compact with 19.76 × 12.7 mm2. The measurement results are in good agreement with the full-wave simulation results.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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Compact dual-band bandpass filter using open stub-loaded stepped impedance resonator with cross-slots
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