Tunable circuit elements for dynamic, per element power

摘要

A communication device and method mitigates specific absorption rate (SAR) exposure of a user. A radio frequency (RF) transmitter amplifies outgoing communication signals to a total radiated power (TRP) level. A matching network electrically connected to the RF transmitter receives the outgoing communication signals. The matching network divides the TRP level of received, outgoing communication signals to a first power level at a first network output and to a second power level at a second network output. First and second antennas electrically connected respectively to the first and second network output radiate the divided, outgoing communication signals at the first and second power levels. A SAR controller communicatively connected to the matching network controls the matching network to shift transmit power between the first and second antennas while maintaining TRP level to reduce SAR exposure of the user.

主权项

1. A communication device, comprising:
a radio frequency (RF) transmitter that amplifies outgoing communication signals to a total radiated power (TRP) level; a matching network electrically connected to the RF transmitter-that divides the TRP level of received, outgoing communication signals into a first power level at a first network output and to a second power level at a second network output; first and second antennas electrically connected respectively to the first and second network output and which radiate the divided, outgoing communication signals at the first and second power levels respectively; and a specific absorption rate (SAR) controller communicatively connected to the transmitter and the matching network and which controls the matching network to configure complete communication device TRP and total isotropic sensitivity (TIS) by configuring matching networks on a per antenna element basis while conforming to SAR limits.