Wireless device with dynamically adjusted maximum transmit powers

摘要

An electronic device may be provided with antenna structures. Proximity sensors and other sensors may be used in determining how the electronic device is being operated. Wireless circuitry such as a radio-frequency transmitter associated with a cellular telephone communications band, a wireless local area network band, or other communications band may be used in transmitting radio-frequency signals through the antenna structures at a transmit power. Control circuitry may adjust the wireless circuitry to ensure that the transmit power is capped at a maximum transmit power. The maximum transmit power may be adjusted dynamically by the control circuitry based on data from the proximity sensors, data from a magnetic sensor that detects whether a cover is present on the device, a connector sensor that detects whether the device is coupled to a dock or other accessory, and other sensors.

主权项

1. An electronic device, comprising:
control circuitry; an antenna; wireless circuitry that transmits signals through the antenna at a transmit power that is capped at a maximum transmit power level by the control circuitry; and a proximity sensor that produces a proximity sensor output indicative of whether an external object is adjacent to the antenna, wherein the control circuitry is configured to back off the maximum transmit power by one of at least three different amounts based on the proximity sensor output.