Microstrip Bandpass Filters
This application note presents S-parameters obtained with effective usage of WIPL-D Fitter, number of unknowns, computer memory required and simulation time per frequency obtained after simulation of two passive, microstrip, band pass filters. The first simulated filter is interdigital, while the second one is filter with coupled resonators.
The software tool used for simulations is WIPL-D Pro, a full wave 3D EM Method-of-Moments based solver. Interdigital BPF was simulated from 1900 MHz to 2600 MHz, while coupled resonator filter was simulated from 2000 MHz to 2700 MHz. Both simulations were performed in 9 frequency points. The S11-parameter curve is very smooth, owing WIPL-D Fitter efficient interpolation of the frequency response.
Simulations show extremely low number of unknowns and can be run at any desktop or laptop PC, with simulation times measured in seconds.