A wireless energy transmission system and method based on direction retroactive antenna

Abstract

The invention belongs to the field of antenna array or system technology, and discloses a wireless energy transmission system and method based on a direction-retrospective antenna. A pilot signal generation module generates a pilot signal, and a phase measurement and analysis module collects and analyzes the signal phase. The signal generation module and the closed-loop phase control unit output high-pointing precision back-tracking waves, and the rectenna and the circuit convert electromagnetic energy. The invention overcomes the deficiencies of the two-way signal attenuation and pointing precision in the prior art, and greatly improves the power of the backtracking signal. The present invention adopts the phase measurement and analysis module to collect and analyze the phase information of the pilot signal, and the frequency generator generates the backtracking signal, which effectively avoids the two space attenuation of the signal and greatly improves the power of the backtracking wave; and in the backtracking signal generator A closed-loop phase control system is added to calibrate the phase of the traceback signal in real time, so that the directivity of the traceback signal is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of antenna arrays or systems, and in particular relates to a wireless energy transmission system and method based on a direction-retrospective antenna. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: Wireless energy transmission technology refers to a technology that transmits energy to the terminal without the need for wires. The main implementation methods include: inductive coupling, electromagnetic resonance coupling, ultrasonic, laser, and microwave. Inductive coupling and electromagnetic resonance coupling have large transmission power, respectively use coil coupling and strong electromagnetic coupling between electromagnetic resonance objects to transmit energy, but the transmission distance is limited; ultrasonic waves can only propagate through various coals, and have a large attenuation in the air. The transmission efficiency is low...

AI Technical Summary

Problems solved by technology

All the above-mentioned implementation methods, after receiving the pilot signal, conjugate the pilot signal to form a backtracking signal, so that the signal will go through two space attenuations, the power of the backtracking signal is weak when it reaches the receiving end, and the phase control accuracy is not high

[0003] In summary, the problems in the prior art are: According to the Fries transmission formula, under the condition of fixed antenna aperture and gain, the power received by the receiving end decreases with the increase of the transmission distance of electromagnetic waves.

And during long-distance transmission, the influence of the power divider, amplifier and mixer in the circuit on the phase of the retrospective wave will have a great impact on the directivity of the retroactive wave

It is very difficult to control the phase consistency in the circuit, and the coupling between the links will also affect the system performance

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