Multi-coupled-resonator dual-band bandpass microstrip filters with non-resonating nodes

Author

Sánchez-Renedo, Manuel ; Gómez-García, Roberto

Author_Institution

Dept. of Signal Theor. & Commun., Univ. of Alcala, Alcala de Henares, Spain

fYear

2011

fDate

5-10 June 2011

Firstpage

1

Lastpage

4

Abstract

This paper reports the application of non-resonating nodes to develop high-selectivity dual-passband microstrip filters. To this aim, these nodes are used as cross-coupling paths to increase the inter-resonator signal interactions. Thus, several transmission zeros can be created under signal-interference principles. Two alternative implementations for the non-resonating node, suitable for planar technologies, are shown. Moreover, they are validated through two different 1.1/1.4-GHz high-order dual-band bandpass filter examples designed at the coupling-matrix level. Simulation and measurement results of their associated manufactured proof-of-concept microstrip prototypes are also provided.

Keywords

band-pass filters; interference (signal); microstrip filters; resonator filters; cross-coupling paths; frequency 1.1 GHz; frequency 1.4 GHz; high-selectivity dual-passband microstrip filters; interresonator signal interactions; multicoupled-resonator dual-band bandpass microstrip filters; nonresonating nodes; proof-of-concept microstrip prototypes; signal interference; transmission zeros; Band pass filters; Couplings; Dual band; Filtering theory; Microstrip; Microwave filters; Resonator filters; Coupling matrix; dual-band filters; filter synthesis; microstrip filters; microwave filters; multi-band filters; nonresonating nodes; transmission zeros; transversal networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International

Conference_Location

Baltimore, MD

ISSN

0149-645X

Print_ISBN

978-1-61284-754-2

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2011.5972970

Filename

5972970