Title :
Rotationally symmetric FDTD for fast design and wideband spurious performance prediction of dielectric resonator filters
Author :
Weily, Andrew R. ; Mohan, Ananda S.
Author_Institution :
Fac. of Eng., Univ. of Technol., Sydney, NSW, Australia
Abstract :
The computationally efficient rotationally symmetric (RS)-FDTD method has been used to obtain extremely accurate filter parameters for TE01 and TM01 dielectric resonators loaded in cylindrical cavities. The RS-FDTD method combined with digital filtering and the Matrix Pencil technique is used to analyze the resonant frequencies and inter-resonator coupling values. When perturbation theory is used with RS-FDTD, accurate values of unloaded Q are obtained. The generalized perfectly matched layer (GPML) coupled with RS-FDTD has been utilized to extract the S-parameters for a 4-pole probe-coupled TM 01 DR filter, in order to directly obtain the theoretical wideband spurious performance
Keywords :
Q-factor; S-parameters; cavity resonator filters; circuit optimisation; dielectric resonator filters; finite difference time-domain analysis; perturbation theory; 4-pole probe-coupled TM01 DR filter; S-parameters; TE01 dielectric resonators; TM01 dielectric resonators; cylindrical cavities; dielectric resonator filters; digital filtering; fast design; filter parameters; generalized perfectly matched layer; inter-resonator coupling values; matrix pencil technique; perturbation theory; resonant frequencies; rotationally symmetric FDTD; unloaded Q; wideband spurious performance prediction; Dielectrics; Digital filters; Filtering; Finite difference methods; Resonant frequency; Resonator filters; Symmetric matrices; Tellurium; Time domain analysis; Wideband;
Conference_Titel :
Microwave Conference, 1999 Asia Pacific
Print_ISBN :
0-7803-5761-2
DOI :
10.1109/APMC.1999.833725
