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Pseudo-elliptic dual-band filters based on TM dual-mode cavities

Published online by Cambridge University Press:  10 February 2016

Valeria Nocella ,
Luca Pelliccia ,
Hamza El Ghannudi ,
Cristiano Tomassoni  and
Roberto Sorrentino
Valeria Nocella*
Affiliation:
Department of Engineering, University of Perugia, Via G. Duranti 93, Perugia, Italy. Phone: +39 075 585 3671
Luca Pelliccia
Affiliation:
RF Microtech Srl, Via P. Mascagni 11, Perugia, Italy
Hamza El Ghannudi
Affiliation:
RF Microtech Srl, Via P. Mascagni 11, Perugia, Italy RF Microtech Srl France, 815 LA Pyreneenne, 31670 Labege, France
Cristiano Tomassoni
Affiliation:
Department of Engineering, University of Perugia, Via G. Duranti 93, Perugia, Italy. Phone: +39 075 585 3671
Roberto Sorrentino
Affiliation:
Department of Engineering, University of Perugia, Via G. Duranti 93, Perugia, Italy. Phone: +39 075 585 3671
*
Corresponding author: V. Nocella Email: valeria.nocella@studenti.unipg.it
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Abstract

This paper presents possible configurations of dual band filters based on transverse magnetic (TM) Dual mode cavities. The concept is to use TM dual-mode cavities in order to design compact dual band filters. High flexibility is obtained in terms of transmission zero (TZ) positioning. By using this approach a number of TZs up to the number of poles is attainable. Zeros can be placed in both the lower and upper stop-bands as well as between the two pass-bands to increase their insulation. The use of TM cavities allows a dramatic reduction of the filter length without significantly reducing the RF performances. Two three-cavity TM dual-band filters with six symmetric and asymmetric TZs have been designed and manufactured to validate the proposed geometry.

Keywords

FiltersPassive components and circuits
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 3: Journee Nationale des Micro-ondes (JNM) 2015 , May 2016 , pp. 415 - 419
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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References

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