Regulating transmit power of signal sources
First Claim
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1. A system for detecting human presence in proximity of a user device, the system comprising:
- a first directional coupler having a first port communicatively coupled to an antenna, wherein a portion of a signal passing from a second port of the first directional coupler to the first port of the first directional coupler is provided at a third port of the first directional coupler;
a second directional coupler having a first port communicatively coupled to a signal source, and a second port communicatively coupled to the second port of the first directional coupler, wherein a portion of a signal passing from the second port of the second directional coupler to the first port of the second directional coupler is provided at a third port of the second directional coupler; and
a processor to regulate, based on a comparison of the portion of the signal at the third port of the first coupler and the portion of the signal at the third port of the second directional coupler, a transmit power of the signal source.
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Abstract
Example implementations relate to detecting human presence in proximity of a user device. In example implementations, a portion of a first signal may be provided by a first directional coupler that is communicatively coupled to an antenna. A portion of a second signal may be provided by a second directional coupler that is communicatively coupled to a signal source. Transmit power of the signal source may be regulated based on the signal portions provided by the first and second directional couplers.
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Citations
15 Claims
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1. A system for detecting human presence in proximity of a user device, the system comprising:
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a first directional coupler having a first port communicatively coupled to an antenna, wherein a portion of a signal passing from a second port of the first directional coupler to the first port of the first directional coupler is provided at a third port of the first directional coupler; a second directional coupler having a first port communicatively coupled to a signal source, and a second port communicatively coupled to the second port of the first directional coupler, wherein a portion of a signal passing from the second port of the second directional coupler to the first port of the second directional coupler is provided at a third port of the second directional coupler; and a processor to regulate, based on a comparison of the portion of the signal at the third port of the first coupler and the portion of the signal at the third port of the second directional coupler, a transmit power of the signal source. - View Dependent Claims (2, 3, 4, 5)
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6. A non-transitory machine-readable storage medium encoded with instructions executable by a processor of a user device for detecting human presence in proximity of the user device, the machine-readable storage medium comprising:
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instructions to sample a portion of a first signal transmitted from a signal source to an antenna of the user device, wherein the portion of the first signal is provided by a first directional coupler; instructions to sample a portion of a second signal reflected from the antenna to the signal source, wherein the portion of the second signal is provided by a second directional coupler; and instructions to regulate, based on a comparison of the portion of the first signal that is sampled and the portion of the second signal that is sampled, a transmit power of the signal source. - View Dependent Claims (7, 8, 9, 10)
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11. A method for detecting human presence in proximity of a user device, the method comprising:
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sampling a portion of a first signal transmitted from a signal source to an antenna of the user device, wherein the portion of the first signal is provided by a first directional coupler; sampling a portion of a second signal reflected from the antenna to the signal source, wherein the portion of the second signal is provided by a second directional coupler; and regulating, based on a comparison of the portion of the first signal that is sampled and the portion of the second signal that is sampled, a transmit power of the signal source. - View Dependent Claims (12, 13, 14, 15)
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Specification