SMART RADIATION PROTECTION SYSTEM FOR MOBILE DEVICE TO REDUCE SAR WITH ACTIVELY TUNABLE ELECTROMAGNETIC SHIELDING SCREEN WORKS BY SENSING DEVICE PROXIMITY ENVIRONMENT WITH PROPERTY, POSITION, ORIENTATION, SIGNAL QUALITY AND OPERATING MODES

摘要

The smart directional radiation protection system is a design and technique to protect the mobile 100 user form radiation utilising actively tunable electromagnetic shielding screen to controls the intensity of radiation 1.80 form antenna on user 170 facing direction to reduce SAR that works mainly by scanning or detecting user device proximity environment with property & position sensing, device orientation, user head & hand hold effect, signal quality parameters and operating modes while maintaining the radiations on other directions to sustain communication. The smart directional radiation protection system consist of (a) a sensor system 130 to determine the change in user proximity with its property & position sensing, device orientation, usage scenarios or operating modes and accordingly generate the trigger signal 230; (b) a processing unit for manipulation of interrupt control signal 140 according to trigger signal, antenna sensitivity, DOA and signal quality parameters; (c) An active directional transmit power or radiation controller 120 that works based on control signal; (d) Electromagnetic shielding screen [E.g. fabricated with tunable metamaterial or EBG] 110 capable of controlling the intensity of radiation from antenna coupled with directional transmit power controller 120 that controls the radiation on user 170 facing direction to reduce SAR and also restores radiation according to parameters and configurations to optimise communication.