Static threshold eliminating and dynamic threshold eliminating combined type voltage-doubler rectifier

Abstract

The invention belongs to the technical field of energy capture, and particularly discloses a static threshold eliminating and dynamic threshold eliminating combined type voltage-doubler rectifier. According to the voltage-doubler rectifier, the static threshold eliminating technology and the dynamic threshold eliminating technology are combined, the equivalent threshold of a rectifier tube is changed through direct current bias so as to increase the positive-direction breakover current of the rectifier tube, and the rectifier tube is switched off with anti-phase radio-frequency signals so as to reduce the reverse leakage current of the rectifier tube. According to the voltage-doubler rectifier, high-efficiency power conversion under ultralow radio-frequency power input can be realized, good impedance matching within the bandwidth of wide input power can be realized, and then energy transmission efficiency within a wide power band is improved. When the voltage-doubler rectifier is applied to the fields such as radio frequency identification (RFID), label reading and writing sensitivity can be improved greatly, and then system sensitivity is improved.

Description

technical field [0001] The invention belongs to the technical field of energy acquisition, and specifically relates to a converter from AC power to DC power, also known as a voltage doubler rectifier. Background technique [0002] Wireless energy transmission and acquisition technology is widely used in many fields. The usual mode is that the antenna induces an AC voltage signal, and then converts the AC power to DC power through a rectifier or a voltage doubler rectifier. [0003] With the development of technologies such as radio frequency identification (RFID), the power conversion efficiency of wireless energy transfer becomes more and more important. In some applications, such as the long-distance working mode of UHF RFID, people hope to realize high-efficiency power conversion under ultra-low RF power (such as -20dBm or less) input. To improve power conversion efficiency, it is necessary to increase the forward conduction current and reduce the reverse leakage current...

AI Technical Summary

Problems solved by technology

[0009] 1) With the further reduction of the input RF power and the reduction of the RF signal amplitude, the circuit structure is still difficult to overcome the rectification dead zone, the conduction angle decreases, and the rectification efficiency drops rapidly;

[0010] 2) As the input RF power further decreases, the amplitude of the RF signal decreases, the on-resistance of the rectifier tube increases, and the rectifier

Traditional rectification technology often can only optimize the circuit structure and parameters under the condition of the minimum input power concerned in order to obtain efficient energy transmission under this input power. When the input power changes, the working state of the rectifier tube changes, and the equivalent input impedance changes. A large amount of power is lost due to the impedance mismatch between the antenna and the rectifier. The common relationship between power conversion efficiency and input power including impedance mismatch is as follows image 3 shown

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