Title :
Design of a Bandpass Transversal Filter Employing a Novel Hybrid Waveguide-Printed Structure
Author :
Martinez-Mendoza, M. ; Gomez-Diaz, J.S. ; Canete-Rebenaque, D. ; Gómez-Tornero, J.L. ; Alvarez-Melcon, A.
Author_Institution :
Cartagena Tech. Univ., Cartagena
Abstract :
This paper introduces a novel hybrid structure to implement a bandpass transversal filter based on the combination of two well known technologies. The structure combines for the first time the waveguide and the microstrip technologies for the design of transversal filters with maximum selectivity. By combining these technologies, very compact structures are obtained to implement the so called modified doublet. One of the resonators of the doublet is formed with the TM111 mode of a waveguide cavity, while the second resonator is implemented using a standard printed line microstrip resonator. It is shown that all the parameters of the N + 2 coupling matrix can be controlled by means of the dimensions of the proposed structure. Results validate the novel structure, and show how a second order filtering function of a specific coupling matrix can be easily synthesized.
Keywords :
band-pass filters; cavity resonator filters; matrix algebra; microstrip filters; transversal filters; bandpass transversal filter; coupling matrix; hybrid waveguide-printed structure; microstrip resonator; modified doublet; waveguide resonator cavity; Band pass filters; Couplings; Filtering theory; Microstrip resonators; Microwave filters; Resonant frequency; Resonator filters; Signal synthesis; Transmission line matrix methods; Transversal filters; Band-pass filters; coupling matrixes; resonator filters; synthesis techniques; transmission zeros;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0688-9
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380427