Patent ID: 9673916
Date: 2017-06-06
CPC Classifications: H04B

Claim:
1. An electronic device, comprising: a housing; control circuitry in the housing; a plurality of antennas in the housing including at least a first and second antennas in respective first and second antenna signal paths; and wireless circuitry in the housing that includes transceiver circuitry that operates under control of the control circuitry to transmit and receive antenna signals over the first and second antenna signal paths using the first and second antennas, wherein the control circuitry is configured to use the wireless circuitry to transmit over-the-air antenna signals from the first antenna to the second antenna while measuring corresponding received antenna signals from the first antenna using the second antenna and transceiver circuitry in the second antenna signal path, and the control circuitry gathers impedance measurements using at least the corresponding received antenna signals.