Wireless device with dynamically adjusted maximum transmit powers
First Claim
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.
1 Assignment
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Accused Products
Abstract
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.
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Citations
21 Claims
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1. An electronic device, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An electronic device, comprising:
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control circuitry; antenna structures; wireless circuitry including power amplifier circuitry that transmits radio-frequency signals through the antenna at a transmit power that is capped at a maximum transmit power level by the control circuitry; a proximity sensor that produces a proximity sensor output indicative of whether an external object is adjacent to the antenna structures, wherein the control circuitry is configured to back off the maximum transmit power by a first non-zero amount when the proximity sensor output is between a first proximity sensor output level and a second proximity sensor output level and is configured to back off the maximum transmit power by a second non-zero amount when the proximity sensor output is between the second proximity sensor output level and a third proximity sensor output level; and a magnetic sensor, wherein the control circuitry is configured to back off the maximum transmit power based at least partly on data from the magnetic sensor. - View Dependent Claims (12, 13, 14, 15)
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16. An electronic device, comprising:
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a first antenna; a second antenna; sensor circuitry that gathers proximity sensor data and additional sensor data; control circuitry; and wireless circuitry that transmits radio-frequency signals through the first and second antennas at first and second transmit powers capped respectively at first and second maximum transmit powers by the control circuitry, wherein the control circuitry is configured to adjust the first maximum transmit power using a first maximum transmit power backoff scheme in which the first maximum transmit power is reduced by a first set of non-zero amounts based on the proximity sensor data and using a second maximum transmit power backoff scheme in which the first maximum transmit power is reduced by a second set of non-zero amounts based on the proximity sensor data, the second set of non-zero amounts being different from the first set of non-zero amounts, and the control circuitry being further configured to select a given one of the first and second backoff schemes for use based on the additional sensor data. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification