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UHF second order bandpass filters based on miniature two-section SIR coaxial resonators

Published online by Cambridge University Press:  02 September 2015

Hakim Aouidad ,
Eric Rius ,
Jean-François Favennec ,
Alexandre Manchec  and
Yann Clavet
Hakim Aouidad
Affiliation:
Lab-STICC, Laboratoire des Sciences et Techniques de l'Information de la Communication et de la Connaissance (Lab-STICC), University of Brest, Brest 29200, France. Phone: + 33 (0)2 98 01 70 79 Elliptika, Gouesnou 29850, France
Eric Rius*
Affiliation:
Lab-STICC, Laboratoire des Sciences et Techniques de l'Information de la Communication et de la Connaissance (Lab-STICC), University of Brest, Brest 29200, France. Phone: + 33 (0)2 98 01 70 79
Jean-François Favennec
Affiliation:
Lab-STICC, Laboratoire des Sciences et Techniques de l'Information de la Communication et de la Connaissance (Lab-STICC), University of Brest, Brest 29200, France. Phone: + 33 (0)2 98 01 70 79
Alexandre Manchec
Affiliation:
Elliptika, Gouesnou 29850, France
Yann Clavet
Affiliation:
Elliptika, Gouesnou 29850, France
*
Corresponding author: E. Rius Email: Eric.Rius@univ-brest.fr
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Abstract

This paper describes a concept of stepped impedance resonators (SIR) built from two coaxial structures fitted inside one another. The resonator is built out of a succession of two coaxial sections in cascade, where the ground conductor of the first one is the central core of the next, or vice-versa. An advantageous property of SIR is that they allow a substantial reduction in size, while keeping away the first harmonic and without strongly degrading the quality factor. After describing the theoretical behavior of the resonator, we will then present the specific properties of this approach in second order filter, conceived, and realized in the UHF band. With this example, we will also address flexibility and tunability aspects, which are the other potentially useful properties of the structure. Measurements and simulations are presented and discussed. The architecture resembles a set of two Russian dolls that fit inside one another.

Keywords

Coaxial resonatorBand pass filterStepped impedance resonatorSize reductionUHF
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 8 , December 2016 , pp. 1187 - 1196
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

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