| CPC G06F 1/163 (2013.01) [G06F 1/1626 (2013.01); G06F 1/1628 (2013.01); H01L 27/14618 (2013.01); H01L 27/14627 (2013.01); H01L 31/0232 (2013.01); H01Q 1/273 (2013.01); H04B 1/385 (2013.01); H04B 17/27 (2015.01); H05K 5/0017 (2013.01)] | 20 Claims |
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1. An electronic device, comprising:
a housing at least partially defining an internal volume, the housing comprising an electromagnetically transparent portion at least partially defining an exterior surface of the electronic device;
an antenna disposed in the internal volume and positioned to transmit a signal, the antenna driven at a first power level to transmit the signal through the electromagnetically transparent portion, the first power level associated with a first resonant frequency of the antenna, and the antenna configured to transmit the signal at a second power level associated with a second resonant frequency;
an integrated circuit disposed in the internal volume and positioned to receive the signal at the second power level, the sensing circuit configured to measure a difference between the first power level and the second power level; and
a processor disposed in the internal volume, the processor configured to compare the second power level with the first power level to detect a difference between the first resonant frequency and the second resonant frequency.
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