Proximity-independent SAR mitigation
First Claim
1. A method of regulating forward radiofrequency (RF) power supplied by an RF transmitter circuit to an RF transmitting antenna, the method comprising:
- detecting the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna;
receiving at multiple filters RF power samples of the supplied forward RF power, each filter differently filtering the received RF power samples to apply a different average power period, each filter further activating an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter; and
adjusting the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal.
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Accused Products
Abstract
A radiofrequency (RF) power regulator includes a forward RF power detection circuit to detect forward RF power supplied by an RF transmitter circuit to an RF transmitting antenna. An RF power sampler is coupled to the forward RF power detector circuit and provides RF power samples of the supplied forward RF power. Multiple filters are coupled to receive the RF power samples. Each filter differently filters the received forward power samples to apply a different average power period. Each filter activates an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter. Forward RF power adjustment logic is coupled to filters and operable to adjust the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal.
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Citations
20 Claims
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1. A method of regulating forward radiofrequency (RF) power supplied by an RF transmitter circuit to an RF transmitting antenna, the method comprising:
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detecting the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna; receiving at multiple filters RF power samples of the supplied forward RF power, each filter differently filtering the received RF power samples to apply a different average power period, each filter further activating an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter; and adjusting the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A radiofrequency (RF) power regulator comprising:
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a forward RF power detection circuit configured to detect forward RF power supplied by an RF transmitter circuit to an RF transmitting antenna; an RF power sampler coupled to the forward RF power detection circuit, the RF power sampler providing RF power samples of the supplied forward RF power; multiple filters coupled to receive the RF power samples, each filter differently filtering the received RF power samples to apply a different average power period, each filter further activating an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter; and forward RF power adjustment logic coupled to the multiple filters and operable to adjust the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A communications device comprising:
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a radiofrequency (RF) transmitting antenna; an RF transmitter circuit coupled to supply forward RF power to the RF transmitting antenna; a forward RF power detection circuit configured to detect the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna; an RF power sampler coupled to the forward RF power detection circuit, the RF power sampler providing RF power samples of the supplied forward RF power; multiple filters coupled to receive the RF power samples, each filter differently filtering the received RF power samples to apply a different average power period, each filter further activating an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter; a filter selector coupled to the multiple filters and operable to select one of the multiple filters from which to output the RF power adjustment trigger signal based on at least one of network conditions and transmission requirements; and forward RF power adjustment logic coupled to the filter selector and operable to adjust the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal output from the selected filter.
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Specification