I have been trying to make a 5th-order Chebyshev filter going from 500 MHz - 570 MHz and a 3rd-order Chebyshev filter going from 500 MHz - 540 MHz. This is my first time making a filter into a PCB.
No matter what I do, my physical implementation of it doesn't match my calculations and PSpice simulations.
I realize this circuit doesn't have the most perfect geometry and the parts have tolerances (I chose tolerances that should still work) but it should still be close enough. Why is the pass band so far off? The span on the spectrum analyzer screen is from 1 MHz to 1 GHz. The peak is seen at 350 MHz instead of 535 MHz which it should be.
I'm at my wits end. I have been stuck on this for a month now, please help.
Here is the board geometry. I have confirmed that the values are correct and should work even with their tolerances.