Why do we measure the NFC anetnna at 1MHz not 13.56MHz?

The application note "AN5276" suggest we measure the antenna parameter at 1MHz.

It confuse me that why we could not directly measure it at 13.56MHz.

Regards,

Albert Tseng

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ST Employee

Hello Tseng,

The DC resistance is beeing measured at the lowest possible frequency of the VNA.

For most VNAs the lowest possible frequncy is 1MHz.

BR Travis

ST Employee

Hello Tseng,

The DC resistance is beeing measured at the lowest possible frequency of the VNA.

For most VNAs the lowest possible frequncy is 1MHz.

BR Travis

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