Gradient-based optimization of filters using FDTD software

This letter discusses gradient optimization of band-pass filters using electromagnetic simulation software based on the finite difference-time domain algorithm. It is shown that even high-Q-factor circuits can be optimized in acceptable time if robust digital signal processing techniques that take into account signal dynamics are used to predict the frequency behavior of a structure from relatively short sample sequences.

[1]  P. Guillon,et al.  Computer‐aided design of 3D microwave filter using quasi‐planar high Qu dielectric resonator , 2000 .

[2]  Tao Shen,et al.  Full-wave design of canonical waveguide filters by optimization , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[3]  Kawthar A. Zaki,et al.  Full-wave analysis of coupling between combline resonators and its application to combline filters with canonical configurations , 2001 .

[4]  Thomas Weiland,et al.  Automated optimization of a waveguide-microstrip transition using an EM optimization driver , 1997 .

[5]  R. Lotz,et al.  FD-FD GSM technique for the CAD and optimization of combline filters , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[6]  Kawthar A. Zaki,et al.  Full-wave design of canonical waveguide filters by optimization , 2001, IMS 2001.

[7]  M. Mrozowski Criteria for building Prony models for time domain CAD , 1998, IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36.

[8]  W.K. Gwarek,et al.  Unrestricted arbitrary shape optimization based on 3D electromagnetic simulation [passive microwave structures] , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[9]  Y. Hua,et al.  Generalized pencil-of-function method for extracting poles of an EM system from its transient response , 1989 .

[10]  P. Kozakowski,et al.  Low-order models from FD-TD time samples , 2002, IEEE Microwave and Wireless Components Letters.

[11]  T. Sarkar,et al.  Using the matrix pencil method to estimate the parameters of a sum of complex exponentials , 1995 .

[12]  S. Amari,et al.  Synthesis of cross-coupled resonator filters using an analytical gradient-based optimization technique , 2000 .

[13]  Ralf Beyer,et al.  Automated design of waveguide components using hybrid mode-matching/numerical EM building-blocks in optimization-oriented CAD frameworks-state of the art and recent advances , 1997 .

[14]  J. M. Reiter,et al.  Rigorous analysis of arbitrarily shaped H- and E-plane discontinuities in rectangular waveguides by a full-wave boundary contour mode-matching method , 1995 .