Synthesis of cross-coupled lossy resonator filters with multiple input/output couplings by gradient optimization

Author

Lamperez, Alejandro Garcia ; Salazar-Palma, M. ; Padilla-Cruz, M.J. ; Carpintero, I.H.

Author_Institution

Dpto. Senales, Sistemas y Radiocomunicaciones, Univ. Politecnica de Madrid, Spain

Volume

2

fYear

2003

fDate

22-27 June 2003

Firstpage

52

Abstract

A synthesis technique for lossy or lossless resonator filters with general coupling topology and multiple input/output couplings has been developed and tested. The method is based on the minimization of the difference between the filter response and the theoretical one. Two examples of an exact and an approximate synthesis respectively shows the good performance of the proposed approach.

Keywords

circuit optimisation; coupled circuits; gradient methods; low-pass filters; poles and zeros; resonator filters; transfer function matrices; coupling matrix coefficients; coupling topology; cross-coupled resonator filters; filter response; gradient optimization; lossless resonator filters; lossy resonator filters; lowpass prototype filter; multiple input/output couplings; transfer function zero/pole locations; Band pass filters; Cost function; Coupling circuits; Filtering theory; Frequency; Propagation losses; Reflection; Resonator filters; Symmetric matrices; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2003. IEEE

Conference_Location

Columbus, OH, USA

Print_ISBN

0-7803-7846-6

Type

conf

DOI

10.1109/APS.2003.1219177

Filename

1219177