Invention Grant
- Patent Title: Adaptive maximum power limiting using capacitive sensing in a wireless device
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Application No.: US14689595Application Date: 2015-04-17
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Publication No.: US09621211B2Publication Date: 2017-04-11
- Inventor: Ping Shi , Jinchun Ge
- Applicant: Futurewei Technologies, Inc.
- Applicant Address: US TX Plano
- Assignee: Futurewei Technologies, Inc.
- Current Assignee: Futurewei Technologies, Inc.
- Current Assignee Address: US TX Plano
- Agency: Futurewei Technologies, Inc.
- Main IPC: H04B17/00
- IPC: H04B17/00 ; H04B1/3827 ; H04W52/18 ; H04W52/28 ; H04W52/36

Abstract:
An apparatus for satisfying Specific Absorption Rate (SAR) compliance criteria including a first capacitance sensor, a second capacitance sensor, a memory, and a processor. The memory is configured to store pre-established proximity regions that include a free space region of proximity based on baseline capacitance measurements obtained from the sensors when no human body is proximate a wireless device and a first region of proximity based on initial capacitance measurements obtained from the sensors when the human body is spaced apart from the wireless device by a first predetermined separation distance. The processor is configured to instruct a radio frequency (RF) transmitter to operate at a first output power when subsequent capacitance measurements received from the sensors are within the free space region of proximity and at a second output power, less than the first output power when the subsequent capacitance measurements are within the first region of proximity.
Public/Granted literature
- US20150222312A1 Adaptive Maximum Power Limiting Using Capacitive Sensing in a Wireless Device Public/Granted day:2015-08-06
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