Hello,Could you please tell me why the gain of the transformer is near the -15dB ? what is the test setup for this measurement ?Thanks for your help
This is a 1:1 transformer. The signal source generator is 50 Ohms and the termination is 5 Ohms. The signal generator is expecting to see 50 Ohm termination. Because it is 5 Ohms we get 2*5/(5+50)=0.182=-14.8dB.
If it were a 50 Ohm termination it would be
2*50/(50+50)=1=0dB