Title :
On the sensitivity of coupled resonator filters without some direct couplings
Author :
Amari, Smain ; Rosenberg, Uwe
Author_Institution :
Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Kingston, Ont., Canada
fDate :
6/1/2003 12:00:00 AM
Abstract :
This paper presents an analysis of the sensitivity of coupled resonator filters in which some direct couplings are missing. The effect of changes in the coupling coefficients and resonant frequencies of the resonators is investigated by directly computing the gradient of the scattering parameters. It is shown that structures that are modular in the input-to-output direction are much less sensitive than those with modularity in the orthogonal direction for the same frequency response.
Keywords :
S-parameters; band-pass filters; cascade networks; coupled circuits; elliptic filters; frequency response; network topology; resonator filters; sensitivity analysis; bandpass filters; branching doublets; cascaded doublets; cascaded triplets; coupled resonator filters; coupling coefficients; direct couplings; elliptic function filters; frequency response; input-to-output direction modularity; orthogonal direction modularity; resonant frequencies; scattering parameters gradient; sensitivity analysis; topologies; Couplings; Cutoff frequency; Electromagnetic spectrum; Filtering theory; Frequency response; Insertion loss; Resonant frequency; Resonator filters; Scattering parameters; Topology;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2003.812582
