Title :
DOE Based Design Method For Coupled-Lines Narrow Bandpass Filter Response Improvement.
Author :
Prigent, Gaëtan ; Rius, Eric ; Le Pennec, François ; Le Maguer, Sandrick ; Ney, Michel ; Le Floch, Marcel
Author_Institution :
LEST-UBO/ENST-Br, BP 809, 29285 Brest Cedex, France. Tel: +(33)2 98 01 70 79, Fax: +(33)2 98 01 63 95. E-mail: Gaetan.Prigent@univ-brest.fr
Abstract :
In this paper we discuss about various modifications of classical coupled-lines narrow bandpass filter to obtain some frequency response improvement. The first modification concerns the broadening of the resonator strip-widths to improve their unloaded Q-factor. The second modification consists in replacing the in/out coupled lines section by tapped lines feeding. Finally a transmission zero is added using a geometrical modification that favor coupling between non-adjacent resonators. The theoretical investigation is carried out through a DOE based sensitivity study using both a circuit modeling approach and a full wave analysis. Theoretical and experimental results on microstrip filters are compared.
Keywords :
Band pass filters; Circuits; Couplings; Design methodology; Frequency response; Insertion loss; Q factor; Resonator filters; Topology; US Department of Energy;
Conference_Titel :
Microwave Conference, 2002. 32nd European
Conference_Location :
Milan, Italy
DOI :
10.1109/EUMA.2002.339201
