Wireless power supply device and wireless power supply system
A wireless power supply and antenna technology, which is applied in the direction of circuit devices, battery circuit devices, near-field transmission systems using transceivers, etc., can solve the problem of equipment power supply reduction and achieve the effect of efficient power supply
Pending Publication Date: 2021-01-29
ORMON CORP
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Problems solved by technology
[0003] In the case of wireless power feeding by sending radio waves from an array antenna, there is a possibility that the power feeding radio waves sent from the
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A wireless power supply device according to the present invention is provided with: a power supply signal generation means for generating a power supply signal; a propagation coefficient calculation means for calculating propagation coefficients between a plurality of antenna elements and an antenna of a power-receiving device; a weight calculation means for calculating, on the basis of the propagation coefficients, a weight for adjusting the phase and the amplitude of the power supply signal generated by the power supply signal generation means for each of the antenna elements; and a power supply signal distribution means for adjusting, on the basis of the weight calculated by the weight calculation means, the phase and the amplitude of the power supply signal generated by the power supply signal generation means for each of the antenna elements, and distributing the adjusted power supply signal to the antenna elements, wherein the antenna elements forming an array antenna convert thepower supply signal into a power supply radio wave, and transmit the power supply radio wave to the power-receiving device.
Description
technical field [0001] The invention relates to a wireless power supply device and a wireless power supply system. Background technique [0002] RFID (Radio Frequency IDentifier: Radio Frequency Identification) technology is used to perform wireless data communication between the RFID tag and the RFID reader, and wireless power supply from the RFID reader to the RFID tag. In addition, for wireless data communication and wireless power supply, for example, an array antenna in which a plurality of antenna elements are regularly arranged is installed in an RFID reader. [0003] When wireless power feeding is performed by transmitting radio waves from an array antenna, the power feeding radio waves transmitted from a plurality of antenna elements forming the array antenna may interfere with each other, and the power supply received by the power feeding target device may decrease. Therefore, techniques for adjusting radio waves transmitted from each antenna element are disclosed...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02J50/20G06K7/10H01Q3/26H02J50/40H02J50/80
CPCH02J50/20H02J7/00H01Q3/26H01Q21/06H02J50/80H04B5/02G06K7/10H02J50/402
Inventor M·T·阮村井彬人斋藤启介井上优树
Owner ORMON CORP