Microwave narrowband wireless energy transmission method and device based on focused wave

Abstract

The invention discloses a microwave narrowband wireless energy transmission method and device based on a focused wave and belongs to the technology of wireless energy transmission. Unlike a conventional wireless energy transmission mechanism and the broadband TR wireless energy transmission technology based on short pulses, a narrowband signal (bandwidth less than 10% of the center frequency) similar to the single frequency is used. A TR antenna array is used to transfer electromagnetic energy to a target point in a point focusing way. An omni-directional energy-receiving antenna is placed at the point focusing place in order to convert space electromagnetic wave into high-frequency current, and finally the high-frequency current passes through a rectifier circuit to be converted into DC output. Thus, the wireless transmission of the electromagnetic energy is achieved. In the present invention, the narrowband signal is used for TR wireless energy transmission. Compared with the short pulse, the narrowband signal can carry more energy in the unit time, and is higher in rectification efficiency. The method and device can adaptively track the target position without a complicated positioning system, and may achieve multi-target wireless energy transmission.

Description

technical field [0001] The method relates to wireless energy transmission technology, in particular to a microwave narrowband wireless energy transmission method based on electromagnetic focused waves. Background technique [0002] Wireless energy transmission refers to the technology of energy transmission without contact with visible physical media. The basic framework of the system is similar to that of wireless communication systems. However, the former focuses on energy transfer, while the latter focuses on information transfer. Wireless energy transmission does not require direct connection of metal electrodes, which can avoid exposed conductors and electric sparks. Compared with traditional wired energy transmission, wireless energy transmission has the advantages of high safety and convenient use. More importantly, wireless energy transmission can be used in some special occasions where wires cannot be erected, such as charging devices implanted in the human body, ...

AI Technical Summary

Problems solved by technology

However, these TR energy transmission systems basically use short pulses as test signals. When performing TR operations, high-speed analog-to-digital converters are required, which is difficult and costly to implement.

In addition, short pulses can transmit less energy per unit time, and short pulses have a wider frequency band, resulting in low rectification efficiency

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