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NTAG I2C Plus antenna board capacitor

Question asked by Kai Buechler on Feb 12, 2017
Latest reply on Feb 13, 2017 by Kai Buechler

Hello,

 

I need to desgin a nfc antenna. Therefore I read the AN11276 NTag Antenna Design Guide. I was wondering why there is an additional capacity of 130pF on the antenna board (see Picture below)? I did not found any Information in the design guide.

 

Anyone knows why it is placed there?

AntennaBoardSchematics

 

Thanks

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