Title :
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
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;
Conference_Titel :
Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-61284-754-2
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2011.5972970
