SAR Control Using Capacitive Sensor and Transmission Duty Cycle Control in a Wireless Device
First Claim
1. A wireless device for providing specific absorption rate (SAR) control comprising:
- a wireless transmitter;
a capacitance sensor; and
a processor coupled to the wireless transmitter and the capacitance sensor, wherein the processor is configured to;
receive a first capacitance measurement from the capacitance sensor;
estimate a relative proximity of a human body to the apparatus based on the measurement;
determine a target transmission time for the wireless transmitter within a time period based on the estimate; and
switch off the wireless transmitter for a portion of the time period if a transmission time of the wireless transmitter during the time period exceeds the target transmission time.
1 Assignment
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Accused Products
Abstract
A wireless device for providing specific absorption rate (SAR) control comprising a wireless transmitter, a capacitance sensor, and a processor coupled to the wireless transmitter and the capacitance sensor, wherein the processor is configured to receive a first capacitance measurement from the capacitance sensor, estimate a relative proximity of a human body to the apparatus based on the measurement, determine a target transmission time for the wireless transmitter within a time period based on the estimate, and switch off the wireless transmitter for a portion of the time period if a transmission time of the wireless transmitter during the time period exceeds the target transmission time.
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Citations
20 Claims
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1. A wireless device for providing specific absorption rate (SAR) control comprising:
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a wireless transmitter; a capacitance sensor; and a processor coupled to the wireless transmitter and the capacitance sensor, wherein the processor is configured to; receive a first capacitance measurement from the capacitance sensor; estimate a relative proximity of a human body to the apparatus based on the measurement; determine a target transmission time for the wireless transmitter within a time period based on the estimate; and switch off the wireless transmitter for a portion of the time period if a transmission time of the wireless transmitter during the time period exceeds the target transmission time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for providing specific absorption rate (SAR) control comprising:
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receiving a first capacitance measurement of a first capacitor from a capacitance sensor, wherein the capacitance sensor is coupled to a wireless device, and wherein the wireless device comprises a wireless transmitter; estimating a relative proximity of a human body to the wireless device based on the measurement; determining a target transmission time for the wireless transmitter within a time period based on the estimate; and switching off the wireless transmitter for a portion of the time period if a transmission time of the wireless transmitter during the time period exceeds the target transmission time. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A wireless device comprising:
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a wireless transmitter; a capacitance sensor configured to measure a first capacitance value and a second capacitance value; and a processor coupled to the wireless transmitter and the capacitance sensor, wherein the processor is configured to; determine that a human body is proximately located to the wireless device; identify a first one of a plurality of proximity regions within which the human body is located based on the first capacitance value and the second capacitance value; monitor a transmit time of the wireless transmitter during a time period; and prohibit transmission by the wireless transmitter during a portion of the time period if the transmit time exceeds a target transmit time, wherein a transmit time exceeding the target transmit time does not satisfy one or more specific absorption rate (SAR) compliance criteria for humans located in the first proximity region. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification