High-efficiency multi-tone signal rectifier for realizing wide input power range

Abstract

The invention discloses a high-efficiency multi-tone signal rectifier for realizing a wide input power range. The rectifier comprises a multi-tone signal generator, a wide-power impedance compression network for realizing impedance matching of multi-tone signals, a rectifying circuit and a filtering network, and the multi-tone signal generator, the wide-power impedance compression network, the rectification circuit and the filter network are connected in sequence. According to the invention, high-efficiency rectification with low input power can be realized by optimizing the waveform of the rectification signal.

Description

technical field [0001] The invention relates to the field of radio frequency signals, in particular to a high-efficiency multi-tone signal rectifier for realizing a wide input power range. Background technique [0002] The radio frequency signal rectifier is an important part of the wireless energy transmission system, and its function is to realize the conversion of radio frequency signal energy into DC energy for the use of subsequent circuits. Rectifiers have a wide range of applications in electronic devices, power transmission, energy harvesting, and wireless energy transfer. Energy conversion efficiency is an important indicator of rectifier performance. Due to the characteristics of the turn-on voltage of the diode, the diode cannot be fully turned on under low input power conditions, which leads to low energy conversion efficiency of general rectifiers in the low input power range. [0003] At present, there are three main methods for improving the rectification ef...

AI Technical Summary

Problems solved by technology

Due to the characteristics of the turn-on voltage of the diode, the diode cannot be fully turned on under low input power conditions, which leads to low energy conversion efficiency of general rectifiers in the low input power range

[0003] At present, there are three main methods for improving the rectification efficiency of RF rectifiers under low input power conditions. The first method is to improve the performance of diodes and reduce the turn-on voltage of diode PN junctions to improve the rectification efficiency of rectifiers under low input power conditions. However, this method is technically difficult and the process is complicated; the second is because the input impedance of the rectifier circuit is different under different input powers, and the matching circuit designed according to the optimal power point is mismatched when the working power point deviates, resulting in a significant drop in rectification efficiency. Therefore, a method for improving the structure of the rectifier circuit, such as ICN and RCN, has been produced. This method does not improve the efficiency of low power; the third is the rectification technology based on waveform optimization, through the waveform amplitude, shape, Duty cycle and other parameters are changed to generate waveforms such as white noise, square wave, time-division multiplexing waveform, and multi-tone signal. Waveform optimization makes it easier for the diode to be fully turned on under low input power conditions. This method greatly improves low power efficiency. and easy to implement

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