EMC inductor-free RF front-end method and topology with power by field function for an inductively coupled communication system

A near field communication (NFC) device capable of operating by being powered by the field includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module wi...

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Bibliographic Details
Main Authors Ding, Jingfeng, Hueber, Gernot, Merlin, Erich
Format Patent
LanguageEnglish
Published 15.06.2021
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary:A near field communication (NFC) device capable of operating by being powered by the field includes an NFC module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna circuit coupled to and driven by said NFC module with the modulated carrier signal. The device includes an RF front end coupled between said NFC module and said antenna circuit. The RF front end includes a balanced to unbalanced (Balun) transformer and a tuning capacitor to provide a function of an electromagnetic compatibility (EMC) filter. A powered by the field circuit of the NFC device is adapted to harvest energy from an external field to power said NFC device. The power by the field circuit is coupled to said Balun transformer via one or more impedance elements.
Bibliography:Application Number: US201816215173