rfid天线和芯片匹配问题

阻抗设置为芯片阻抗的共轭
下面那个选择不归一化

想问一下，这种情况下跟用芯片实阻抗激励时获得的增益一样吧?按道理来说，增益应该跟S11有关系的，两种情况下的S11是不一样的，这个应该怎么理解?多谢！

Actually,  I guess the gain you mentioned is the realized gain meaning how much gain you can really get after antenna is excited.
The realized gain depands on the directivity, the return loss (S11).
If the match network is off and your return loss is not low enough, then, that degrade your realized gain.