Re: Why this filter has such poor insertion loss characteris
Hi,
I used Er = 2.65, H=0.3mm, t=0.035mm for the simulation, and I used tapered input for matching the in/out lines. I simulated in the linear simulator, optimized, and after that I run the EM simulator. The results are not so bad. Take a look to the below pictures. Check your design, for the mesh at the U folded arms. Also, the discontinuity at the i/o and 50 ohm line could be a problem.
rgds, Al
lila+blue trace= linear simulation, red and green EM