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Frequency-reconfigurable microstrip filter with dual-mode resonators using RF PIN diodes and DGS

Published online by Cambridge University Press:  27 August 2014

Hesham A. Mohamed ,
Heba B. El-Shaarawy ,
Esmat A.F. Abdallah  and
Hadia M. El-Hennawy
Hesham A. Mohamed*
Affiliation:
Microstrip Department, Electronics Research Institute, Cairo, Egypt. Phone: +202 01229880280
Heba B. El-Shaarawy
Affiliation:
Electronics and Communication Engineering Department, Faculty of Engineering, Cairo University, Giza, Egypt
Esmat A.F. Abdallah
Affiliation:
Microstrip Department, Electronics Research Institute, Cairo, Egypt. Phone: +202 01229880280
Hadia M. El-Hennawy
Affiliation:
Electronics and Communications Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt
*
Corresponding author: H.A. Mohamed Email: hesham_280@yahoo.com
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Abstract

This work presents a novel frequency miniaturized reconfigurable dual-mode stub-loaded resonator switchable from bandpass filter to single/double-notched bandnotch filter. The proposed filter topology employs RF PIN diodes as the switching device. Based on the odd- and even-mode equivalent circuits, the resonant characteristics of the proposed microstrip resonator are investigated. The defected ground structure pattern enhanced the performance; the 3-dB bandwidth reached 63%, with insertion loss of −0.5 dB. There was great sharpness of 55 dB in the low-frequency edge (from 1.7982 to 1.8466 GHz) and 33 dB in the high-frequency edge (from 3.4329 to 3.4995 GHz). The frequency-reconfigurable microstrip filter has been designed, fabricated, and measured for application in narrow band and ultra-wideband.

Keywords

FiltersCircuit design and applications
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 7 , Issue 6 , December 2015 , pp. 661 - 669
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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References

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