I apologized because I forgot calibration before measuring. That is my big mistake.
This is an impedance and a return loss value of antenna:
Impedance is 41.2+j17.787
Impedance of Rectifier circuit (removed all of matching components)
Impedance of rectifier: 99.169 – j30
This is how I calibrate the Port 1 of NA
I use this website to calculate for me the impedance circuit:
**broken link removed**
I tried so many cases and I cannot control the results, it worse and worse.
This is one of my matching circuits (in the new one when Zload > Zsourse)
I just use Csource = 1.8pF and this is the result.
I will keep going and try to matching it.
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My circuit board and the result with C = 1.8pf and Lload = 6.8nH.
The real part is nearly 41Ohm. When I add Lsource the value changed so much and I cannot control it. How can I adjust Sir?
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How about this result Sir, I think I can use it 44.3 - j36. I achieve it when just use only C=2.2pF.