Voltage-multiplying RF rectifying antenna

Abstract

The invention discloses a voltage-multiplying RF rectifying antenna, comprising an antenna and a voltage-multiplying rectifying circuit, and characterized in that the antenna is realized by a T-matching structure symmetric vibrator antenna which is arranged on the upper surface of a PCB dielectric board in a copper-clad manner; and the voltage-multiplying rectifying circuit uses a differential charge pump circuit structure, is formed by directly soldering lumped elements, and is soldered to the antenna. The voltage-multiplying RF rectifying antenna is small in size, and has high rectificationefficiency and high output voltage within a current wide input power range.

Description

technical field [0001] The invention relates to a radio frequency rectifying antenna, in particular to a voltage doubler type radio frequency rectifying antenna. Background technique [0002] Microwave wireless power transmission and energy harvesting technologies are mainly used for long-distance energy transmission and energy harvesting. With the gradual maturity of high-power microwave sources and the improvement of the performance of microwave rectifier diodes, the rectification efficiency of wireless energy transmission systems is also improving. In recent years, with the development of the Internet of Things technology, the concept of the Internet of Everything has gradually become popular, but the power supply problem of the Internet of Things nodes has become one of its bottleneck technologies, and the microwave wireless power transmission and energy harvesting technology will provide the power supply problem for this type of scene. An effective technical means. As ...

AI Technical Summary

Problems solved by technology

Traditional RF rectennas usually use an unbalanced single-port feed mode, and the input impedance is generally designed as a pure resistance form such as 50Ω or 75Ω. Therefore, the RF rectenna needs to be equipped with an additional impedance matching circuit to realize the input impedance of the antenna and the rectification circuit. Conjugate matching of impedance, which will result in a larger size of the RF rectenna

In addition, the input power received by the rectenna usually changes in a wide range, and it is difficult for the traditional RF rectenna to achieve low input power and high input power while achieving high conversion efficiency

In particular, even if some designs can achieve better conversion efficiency in the low input power range, it is difficult to obtain a higher output voltage, and thus cannot drive the load circuit

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