Mitsubishi Electric Corporation

Manabu Sawa

Yukihiro Homma

Maho Sato

A power transmission device includes: a power transmission antenna including element antennas to radiate a radio wave and element modules each provided for a predetermine number of element antennas and including a phase shifter to change a phase of a transmission signal radiated as the radio wave and an amplifier to amplify the transmission signal; and an REV method phase controller to change the phase of the transmission signal by a phase shift amount obtained by adding an operation phase shift amount for executing the REV method and a direction change phase shift amount for changing a transmission direction, for an operating phase shifter being part of the phase shifters, such that operation of changing the phase shift amount of the operating phase shifters is repeated while changing the operating phase shifters in a state in which at least some element antennas radiate the radio wave.

Wireless power transmission device

A wireless power transmission device includes: a power transmission antenna; a radiation direction determiner; an orientation direction changer; and a transmission signal generator. The power transmission antenna is a phased array antenna including: a plurality of element antennas to radiate radio waves; and a plurality of element modules, each of the plurality of element modules including a phase shifter to change a phase of a transmission signal and an amplifier to amplify the transmission signal from the power transmission antenna. A phase offset value for the phase shifter included in each of the plurality of element modules is calculated by performing a REV (rotating element electric field vector) method using an aerial moving body hovering over the power transmission antenna and mounting a measurement antenna to receive a radio wave and a radio wave measurer to measure received radio wave data including an amplitude of the radio wave received by the measurement antenna.

Wireless power transmission device and power transmission system to aerial moving body

A radio wave measurement system includes: an aerial moving body to move or to hover above a measurement target antenna for radiating a radio wave in a sky direction; and a position measurer to measure a time added position of the aerial moving body. The aerial moving body includes a measurement antenna to receive the radio wave and a radio wave measurer to measure time-added received radio wave data. The aerial moving body further includes a beam shape data generator to generate radiated radio wave data including the received radio wave data and the radio wave source relative position data representing measurement point data that is a position of the aerial moving body at a point of time when the received radio wave data is measured as a relative position with respect to the measurement target antenna.

Growing community of inventors

Chiyoda-ku, Japan

Manabu Sawa