A multi-antenna energy transmission device, method and device

Abstract

The embodiment of the present invention discloses a multi-antenna energy transmission device, method and device, including a sending device and a receiving device, the sending device includes a plurality of sending antennas; the receiving device includes a plurality of receiving antennas, a plurality of rectifiers and a power splitter ; The sending device formulates an energy beamforming scheme and an energy split coefficient according to the parameter information, and transmits radio frequency energy to the receiving device according to the energy beamforming scheme, and transmits the energy splitting coefficient to the receiving device at the same time. Each receiving antenna in the receiving device can transmit the received RF energy to the corresponding power splitter; each power splitter is connected to the corresponding rectifier, and can adaptively split the RF energy collected by the receiving antenna according to the energy split coefficient processing, so as to ensure that the radio frequency energy transmitted to each rectifier is within an appropriate range, effectively solving the problem that the rectifier is limited by the initial voltage and saturation voltage, resulting in low energy conversion efficiency, and improving the conversion efficiency of radio frequency energy.

Description

technical field [0001] The present invention relates to the technical field of wireless transmission, in particular to a multi-antenna energy transmission device, method and device. Background technique [0002] Nowadays, electronic devices such as mobile phones, Bluetooth headsets, tablet computers and various wearable devices have been widely used, and the charging requirements for electronic devices are becoming more and more frequent. Wireless charging technology can get rid of the shackles of wired charging and has the characteristics of convenience. According to the scope of application and working principle, the current wireless charging technology can be divided into: inductive coupling, magnetic coupling resonance, electromagnetic radiation and laser beam. [0003] Electromagnetic radiation has the advantages of large transmission distance, wide range, and is convenient to transmit energy to multiple receivers at the same time. Its application prospects are very br...

AI Technical Summary

Problems solved by technology

[0005] For the rectifier used to convert radio frequency energy into direct current in the receiving device, due to the existence of nonlinear components such as capacitors and inductors in its circuit design, when the input voltage is lower than the initial voltage, the circuit stops working; and when the When the input voltage is greater than the saturation voltage, the converted electric energy tends to be saturated, resulting in a nonlinear relationship between the energy conversion efficiency and the input RF energy, which makes it impossible to fully convert the RF energy into electrical energy when it is in the nonlinear region.

[0006] For the first structure, each antenna is connected to a rectifier. When the RF energy is transferred to DC, the output voltage of a single rectifier is too low due to the initial voltage, so it cannot work normally.

In the second structure, all antennas are connected to a rectifier, which will cause the RF energy voltage input by the rectifier to exceed the saturation voltage, resulting in low conversion efficiency

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