question about RFID coild verification

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zhangm79

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Hi, guys.
i am doing RFID coil design currently,but doubt how to verify coil without tag chip.
1.Is it possible to tune coil to 50ohms and add one differential 50ohms load to estimate the chip's impedance, then measure voltage between two end of load? if it works, how to design differential 50ohms load?
2.is it possible to design one differential load to estimate any complex impedance of tag chip?

thanks.
 

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