CPC H04B 3/56 (2013.01) [H04B 1/04 (2013.01); H04B 1/16 (2013.01); H04L 25/0264 (2013.01); H04B 2203/5404 (2013.01); H04B 2203/5429 (2013.01); H04B 2203/5483 (2013.01)] | 18 Claims |
1. An apparatus comprising:
a first terminal and a second terminal;
a first circuit comprising a first inductor connected in parallel to a capacitor and connected in parallel to a resistor;
a second circuit comprising a second inductor, wherein the second inductor has a higher inductance and a lower saturation current than the first inductor, and wherein the first circuit and the second circuit are connected in series between the first terminal and the second terminal to form a current path between the first terminal and the second terminal;
a first sensor configured to sense a level of current in the current path;
a second sensor; and
a controller configured to determine, based on one or more measurements of the second sensor, a value corresponding to one of: a resonant frequency of the first circuit, a quality (Q) factor of a resonance corresponding to the resonant frequency, a resistance of the resistor, an impedance of the first circuit, or a bandwidth of the apparatus.
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