论文信息 - Fast analysis and optimization of combline filters using FEM

Fast analysis and optimization of combline filters using FEM

We analyze a combline filter using the Finite Element Method (FEM) with ports where the tuning screws would normally be. The filter is tuned with a circuit simulator using the multiport S-parameter data and lumped capacitors at the ports. We can then optimize the combline filter very rapidly by mapping the "coarse" circuit model to the "fine" FEM model. This optimization is shown to converge in one iteration, with a good starting point.

R.J. Wenzel | D.G. Swanson | D. Swanson | R. Wenzel

[1] E. G. Cristal. Coupled Circular Cylindrical Rods Between Parallel Ground Planes , 1964 .

[2] John W. Bandler,et al. Design optimization of interdigital filters using aggressive space mapping and decomposition , 1997 .

[3] R.J. Wenzel,et al. Observations on the stopband performance of tapped line filters , 2001, 2001 IEEE MTT-S International Microwave Sympsoium Digest (Cat. No.01CH37157).

[4] John W. Bandler,et al. Space mapping technique for electromagnetic optimization , 1994 .

[5] John W. Bandler,et al. Minimax microstrip filter design using direct EM field simulation , 1993, 1993 IEEE MTT-S International Microwave Symposium Digest.

[6] S. H. Chen,et al. Microstrip filter design using direct EM field simulation , 1994 .

[7] E. G. Cristal. Tapped-Line Coupled Transmission Lines with Applications to Interdigital and Combline Filters , 1975 .

[8] R. J. Wenzel. Theoretical and Practical Applications of Capacitance Matrix Transformations to TEM Network Design , 1997 .