Re: Phase shifter
Sorry, I uploaded the circuit drawing because it should have had varactors (reversed biased diodes) instead of caps, C10 & C9.
Davood, I think you are right about the varactor values. What formula are you using to figure 5pF to 10pF?
I've been using this model, zv952v2, and produced these results. I can't get the 180 degrees and my insertion loss is too large.
I resimulated with this newer circuit drawing and produced the same results just to make sure my original circuit is correct. The reason I don't switch L10 & L13 like you suggest is because I wanted it to look just like the circuit layout from the company.
I couple to transformers using a 'mind'. If you look on the left of the schematic you will see them.
Also, I only simulate to 12V because that is the breakdown of the varactor, and I only have that model file.
Let me know about why there is so much insertion loss and about the transformers if you can. Thanks.