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TRANSMITTER DYNAMIC RF POWER CONTROL VIA VSWR DETECTION FOR WIRELESS RADIOS
TRANSMITTER DYNAMIC RF POWER CONTROL VIA VSWR DETECTION FOR WIRELESS RADIOS
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机译:通过无线无线电的VSWR检测进行发射机动态RF功率控制
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摘要
An electronic device [100] includes a power amplifier [102] that sets the power of a transmit signal that is transmitted via an antenna [104] of the device, and further includes a VSWR detector [110] to identify the VSWR at a signal path between the antenna and the power amplifier. As a person (e.g., a user) moves in close proximity to the antenna, the amount of reflected energy along the signal path increases, thereby increasing the VSWR. A power controller of the electronic device sets a gain of the power amplifier based on the VSWR to ensure that the SAR exposure to the person is maintained below a specified threshold.
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