Patent ID: 9515750
Filing Date: 2016-12-06
CPC Classification: G06K,H04B

Claim Text:
1. A method for inductively coupled communication, comprising: applying a carrier signal at a carrier frequency to an antenna circuit, the antenna circuit comprising an antenna and a matching network that resonate at a resonant frequency; measuring a looped-back signal over a range of impedance values, the looped-back signal comprising the carrier signal received by a receiver coupled to the antenna circuit; setting a calibrated impedance as an impedance configuration that produces a resonance peak in the looped-back signal; determining an impedance offset based on a difference between a default impedance and the calibrated impedance, wherein the default impedance comprises a preconfigured matching network impedance associated with the carrier frequency; and applying the impedance offset to the matching network for an operation that uses a second carrier frequency that differs from the carrier frequency used to set the calibrated impedance.