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Designing NFC antenna system

Posted: 08 Oct 2012 ?? ?Print Version ?Bookmark and Share

Keywords:Near field communication? contactless communication? electromagnetic?

Near field communication (NFC) is being developed as a form of contactless communication between wireless devices such as smartphones and tablets. This technology enables users to do things like swipe their devices at the checkout stand or wave them over another NFC-compatible device to share information instantly without complicated setups or physical connections. The antenna systems of these NFC-enabled devices are a critical component. In general, the successful design of NFC antenna systems operating at 13.56MHz requires electromagnetic (EM) simulation of both the polling and listening sides of the antenna system, as well as the incorporation of discrete elements (including nonlinear diode bridges that convert RF energy into DC signals). The typical analyzes performed include RF matching as a function of polling/listening distance, detection of DC signal levels under various conditions, polling coil inductance, and generation of harmonics at the DC port.

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Originally published by AWR Corp. as "Design Of A Near Field Communication Antenna System".

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