The plot compares S21 of the forward 50 ohm file with S21 after forward and reverse were renormalized to 330 ohms. Stopband details of the renormalized curve differ from your earlier curve using a transformer, but the passbands look similar. Thanks for all your help, Don. Also thanks to John Gord for explaining why renormalization works even with improper device loading, which I didn't expect.
Brian
