Enhanced topology for the design of bandpass elliptic filters employing inductive windows and dielectric objects
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Martínez Mendoza, Mónica; Pérez Soler, Francisco J.; Gómez Díaz, Juan Sebastián; Quesada Pereira, Fernando Daniel; Álvarez Melcón , Alejandro; [et al.]Research Group
Grupo de Electromagnetismo Aplicado a las Telecomunicaciones (GEAT)Knowledge Area
Teoría de la Señal y las ComunicacionesSponsors
The authors thank Ministerio de Educación y Ciencia of Spain, which has supported this work under Grant TEC2007- 67630-C03-02/TCM.Publication date
2008-06Publisher
Institute Electrical and Electronics Engineers (IEEE)Bibliographic Citation
MARTÍNEZ MENDOZA, Mónica et al. Enhanced topology for the design of bandpass elliptic filters employing inductive windows and dielectric objects. En: IEEE MTT-S International Microwave Symposium Digest (2008: Atlanta, GA ) 2008 IEEE MTT-S International Microwave Symposium Digest - MTT 2008. Atlanta, GA : Institute Electrical and Electronics Engineers, 2008. Pp. 635 - 638. ISBN 978-1-4244-1780-3Keywords
Puesto dielectricoFiltros inductivos
Ceros de transmisión
Filtros transversales
Filtros de onda guía
Dielectric posts
Doublet topology
Inductive filters
Transmission zeros
Transversal filter
Waveguide filter
Abstract
This work presents a new topology for the design of bandpass elliptic filters employing inductive windows and dielectric objects. The proposed filtering structure combines, for the first time, the modified TE 102 resonating mode with the modified TE 201 mode. The TE 201 mode is excited by placing a wide dielectric post inside a waveguide cavity. The main advantage of the new topology is that two transmission zeros can be synthesized in the insertion loss response of the filter, for a second order structure. Also there is a high flexibility on the location of the transmission zeros. They can be synthesized along the frequency axis for maximum selectivity, or as a pair of complex poles for phase equalization.
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