Hi Sir,
Thank you very much for your valuable support.
We have simulated your S-parameter files and the result is attached for your reference.
The output return loss result over the frequency is around 4.5dB. Is this due to the output transformer which used for matching purpose or it is the performance which can be achieved from VGA.
1) May I know the input and output transformer parts used for this S-parameter test.
2) Is it possible to improve the output return loss by some other transformer part ( 1: 3 or 1:5) instead of 1:4 transformer part?
Regards,
Sugumar K