I have made S11 measurements with a LIMESDR-USB.
The measurements were made on:
Rx1_L (with Easyfix2 applied)
in the frequency range of 10 -2000 MHz
This is the measurement taken on Rx1_L, I was on the impression thar Easyfix2 will also improve VSWR but clearly this is not the case. S11 at 70 MHz is a whopping -0.84 dB!!! (That means a loss above 7 dB)
and here you see the measurement taken on Tx1_1. (Note there is a 70 MHz filter attached)
I would like to optimize the matching circuits for TX and RX under 100 MHz but the matching circuits are differential which I am not used to.
Which SW can you recommend for fine tuning the values in the matching circuit.
Thank you in advance.