| 摘要 |
The smart directional radiation protection system is a design and technique for actively varying, controlling and reducing the intensity of radiation 180 on user 170 facing direction for portable wireless mobile devices like mobile cell phone 100 utilising RF system with tunable metamaterial or tunable EBG antenna system to reduce SAR are disclosed. The system controls the radiation by smart and active dynamic radiation pattern approach to protect the user from radiation. The smart directional radiation protection system consist of (a) a sensor system 130 to determine the change in usage mode, device orientation and proximity of wireless device to user and accordingly generate the trigger signal 230; (b) a processing unit for manipulation of interrupt control signal 140 according to trigger signal and signal quality parameters; (c) An active directional transmit power or radiation controller 120 that works based on control signal; (d) Tunable metamaterial or tunable EBG antenna system 110 coupled with directional transmit power controller 120 that controls the radiation on user 170 facing direction and also restores radiation according to parameters and configuration to reduce SAR and optimise communication. |
