Adjustable wireless circuitry with antenna-based proximity detector
First Claim
1. An electronic device, comprising:
- an antenna with which the electronic device transmits radio-frequency signals;
phase and magnitude detector circuitry that is coupled to the antenna and that makes radio-frequency signal phase and magnitude measurements;
storage and processing circuitry that determines whether an external object is adjacent to the antenna by processing the radio-frequency signal phase and magnitude measurements; and
wireless circuitry that uses the antenna to transmit the radio-frequency signals at a given transmit power, wherein the storage and processing circuitry is configured to adjust the transmit power based on the radio-frequency signal phase and magnitude measurements, wherein the storage and processing circuitry is further configured to reduce the transmit power in response to determining that the external object is adjacent to the antenna by processing the radio-frequency signal phase and magnitude measurements, wherein the antenna is included in a plurality of antennas that are operable to transmit the radio-frequency signals, wherein the phase and magnitude detector circuitry is coupled to each of the plurality of antennas, wherein the storage and processing circuitry determines for each antenna whether the external object is adjacent to that antenna, and wherein the storage and processing circuitry is configured to temporarily disable a given antenna of the plurality of antennas in response to determining that the external object is adjacent to the given antenna.
1 Assignment
0 Petitions
Accused Products
Abstract
An electronic device such as a portable electronic device has wireless communications circuitry. Antennas in the electronic device may be used in transmitting radio-frequency antenna signals. A coupler and antenna signal phase and magnitude measurement circuitry may be used to determine when external objects are in the vicinity of the antenna by making antenna impedance measurements. In-band and out-of-band phase and magnitude signal measurements may be made in determining whether external objects are present. Additional sensors such as motion sensors, light and heat sensors, acoustic and electrical sensors may produce data that can be combined with the proximity data gathered using the antenna-based proximity sensor. In response to detecting that an external object such as a user'"'"'s body is within a given distance of the antenna, the electronic device may reduce transmit powers, switch antennas, steer a phased antenna array, switch communications protocols, or take other actions.
202 Citations
16 Claims
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1. An electronic device, comprising:
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an antenna with which the electronic device transmits radio-frequency signals; phase and magnitude detector circuitry that is coupled to the antenna and that makes radio-frequency signal phase and magnitude measurements; storage and processing circuitry that determines whether an external object is adjacent to the antenna by processing the radio-frequency signal phase and magnitude measurements; and wireless circuitry that uses the antenna to transmit the radio-frequency signals at a given transmit power, wherein the storage and processing circuitry is configured to adjust the transmit power based on the radio-frequency signal phase and magnitude measurements, wherein the storage and processing circuitry is further configured to reduce the transmit power in response to determining that the external object is adjacent to the antenna by processing the radio-frequency signal phase and magnitude measurements, wherein the antenna is included in a plurality of antennas that are operable to transmit the radio-frequency signals, wherein the phase and magnitude detector circuitry is coupled to each of the plurality of antennas, wherein the storage and processing circuitry determines for each antenna whether the external object is adjacent to that antenna, and wherein the storage and processing circuitry is configured to temporarily disable a given antenna of the plurality of antennas in response to determining that the external object is adjacent to the given antenna. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of using an electronic device, comprising:
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transmitting radio-frequency antenna signals through an antenna in the electronic device at a transmit power; with phase and magnitude detector circuitry that is coupled to the antenna in the electronic device, making radio-frequency antenna signal phase and magnitude measurements to determine whether an external object is adjacent to the antenna; in response to determining that the external object is within a given distance of the antenna using the phase and magnitude detector circuitry, reducing the transmit power; gathering sensor input data from a proximity sensor; and weighting data from the phase and magnitude circuitry and data from the proximity sensor using a weighting scheme, wherein adjusting the transmit power comprises adjusting the transmit power based on the weighted data from the phase and magnitude detector circuitry and from the proximity sensor. - View Dependent Claims (8, 9)
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10. A method of using an electronic device, comprising:
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transmitting radio-frequency antenna signals through an antenna in the electronic device at a transmit power; with phase and magnitude detector circuitry that is coupled to the antenna in the electronic device, making radio-frequency antenna signal phase and magnitude measurements to determine whether an external object is adjacent to the antenna; in response to determining that the external object is within a given distance of the antenna using the phase and magnitude detector circuitry, reducing the transmit power; and gathering sensor input data from a sensor selected from the group consisting of;
a camera sensor and an acoustic sensor, wherein adjusting the transmit power comprises adjusting the transmit power based on information from the phase and magnitude detector circuitry and from the sensor.
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11. A portable electronic device comprising:
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at least one antenna having an antenna impedance; and circuitry that determines whether an external object is adjacent to the antenna by making phase and magnitude measurements on radio-frequency antenna signals associated with the antenna to monitor the antenna impedance, wherein the at least one antenna comprises an antenna in a phased antenna array and wherein the circuitry is configured to adjust the phased antenna array based on the phase and magnitude measurements, wherein the antenna comprises multiple resonating element arms and a switch that selectively couples the antenna resonating element arms. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification