A radio frequency energy harvesting system and control method
A technology for collecting system and radio frequency energy, which is applied in the direction of electric energy storage system, control/regulation system, and regulation of electric variables, etc. It can solve the problems of large voltage ripple at the end of the energy storage unit, waste of DC energy, and influence on circuit performance, etc.
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[0024] The present invention will be further described below in conjunction with the accompanying drawings.
[0025] Such as figure 2 As shown, the radio frequency antenna converts the radio frequency energy in the environment into alternating current V RF Input into the matching boost network, the matching boost network will input a lower magnitude of V RF converted to a higher amplitude AC V M , the RF-DC rectifier will receive the alternating current V M converted into higher DC energy, and the output voltage V R , if the system supply voltage V DD Below 0.95V, the output DC energy of the RF-DC rectifier will pass through the self-starting circuit to V DD The energy storage unit at the terminal is charged so that the voltage V DD increases continuously, once the supply voltage V DD If it is higher than 1.02V, the self-starting circuit will be turned off, the system will enter the RF energy extraction mode, and the control circuit will turn on the V L end of the swi...
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