Mitsubishi Electric Corporation

Yukihiro Homma

Toshiyuki Tanaka

Manabu Sawa

Tomohiro Takahashi

Masaomi Tsuru

Maho Sato

Atsushi Yamamoto

Noboru Kawaguchi

Hidetada Tokioka

Masashi Wada

Hiroshi Otsuka

Hidenori Yukawa

Shinji Arai

Jun Nishihara

Hideyuki Nakamizo

Takayuki Morioka

Shota Narasaki

Takuro Sasaki

Motomi Watanabe

Osamu Wada

Kenji Harauchi

Hiroshi Osakada

Yasutoshi Yashiki

Jun Shimokawatoko

Kensuke Baba

Maho Utsumi

A high frequency filter includes: a multilayer substrate including a first substrate for which lands are provided, a second substrate for which lands are provided, and a third substrate for which lands are provided, the third substrate being sandwiched between the first substrate and the second substrate; a columnar conductor electrically connected to the lands in the multilayer substrate; and columnar conductors provided to surround the columnar conductor, electrically connected to a ground plane of the first substrate, and electrically connected to a ground plane of the second substrate. The spacing between the lands of the first substrate and the lands of the third substrate and the spacing between the lands of the second substrate and the lands of the third substrate are electrical lengths of 90 degrees or less at the cutoff frequency.

High frequency filter

A wireless power transmission device includes: a power transmission antenna to transmit power by radiating a radio wave; a radiation direction determiner to determine a radiation direction. The power transmission antenna is a phased array antenna including: a plurality of element antennas to radiate the radio wave; and a plurality of element modules, each of the plurality of element modules including a phase shifter to change a phase of the transmission signal. An orientation direction is changed to the radiation direction by controlling a phase shift amount of the phase shifter. A phase offset value for the phase shifter included in each of the plurality of element modules is calculated by performing a REV method using a hovering aerial moving body hovering above the power transmission antenna. The phase shifter changes the phase by an amount obtained by subtracting the phase offset value from the phase shift amount.

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

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 flying mobile bodyincludes: a rotary blade to rotate to generate lift; an airframe in which the rotary blade is provided; a power reception antenna to include a power reception surface that receives a radio wave transmitting electric power, the power reception surface having an area larger than an area projecting the airframe onto a rotation axis perpendicular plane that is a plane perpendicular to a rotation axis direction that is a direction parallel to a rotation axis of the rotary blade, and a drag reducing structure that reduces a drag generated with respect to a descending airflow generated by rotation of the rotary blade: a converter to convert electric power of the radio wave received by the power reception antenna into DC electric power; a storage battery; and an electric motor to generate power rotating the rotary blade.

Aerial moving body and wireless power transmission system

In a wireless power transmitting device, a control circuit outputs a control signal for setting a frequency and a phase of an F-PLL signal generated by an F-PLL, the F-PLL generates the F-PLL signal having the frequency and the phase set by the control signal output from the control circuit, and a frequency conversion circuit generates a transmission signal by converting a frequency of the F-PLL signal generated by the F-PLL.

Wireless power transmitting device

A rectenna controller connected to a rectenna that receives radio frequency power and converts the radio frequency power into direct current power, the rectenna controller controlling the direct current power received from the rectenna and supplying the controlled direct current power to a load, the rectenna controller including: an input terminal receiving the direct current power converted by the rectenna; an output terminal supplying the controlled direct current power to the load; a first switching element disposed in a current path connecting the input terminal to the output terminal; and a controller controlling the first switching element, wherein when the controller does not operate, the first switching element becomes conducting to render the current path conductive.

Rectenna controller and rectenna apparatus including the same

A rectenna device includes an antenna (), a first rectifier () to rectify a radio frequency wave input in the antenna (), an antenna (), a second rectifier () to rectify a radio frequency wave input in the antenna (), and a capacitive coupler () to form an open circuit in response to direct current and to form a short circuit in response to a fundamental wave. The first rectifier () includes a ground (GND) conductor () to be a reference potential, and the second rectifier () includes a GND conductor () to be a reference potential. The GND conductor () and the GND conductor () are connected with the capacitive coupler () in between. The first rectifier () and the second rectifier () are connected in series.

Rectenna device

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 position of the aerial moving body. The aerial moving body is mounted with a measurement antenna to receive the radio wave and a radio wave measurer to measure received radio wave data. The radio wave measurement system further includes a radiated radio wave 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 data of 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.

Radio wave measurement system

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.

The rectifying device converts high-frequency power input from an input terminal into direct current power and outputs the direct current power from an output terminal. The rectifying device includes a rectifier that converts the high-frequency power into the direct current power, and an impedance changer having one end connected to a connection point of the rectifier and the output terminal and the other end to which reference voltage is applied such that impedance varies while having a negative correlation with respect to an absolute value of voltage of the direct current power. When the absolute value of the voltage of the direct current power is greater than a predetermined value that is lower than reverse withstand voltage of the rectifying element included in the rectifier, the impedance of the impedance changer as viewed from the rectifier is a value regarded as corresponding to a short circuit.

Rectifier and rectenna device

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.

A wireless power supply system is a system wirelessly supplying electric power through electromagnetic waves. The wireless power supply system includes a power transmitter transmitting an electromagnetic wave, and a plurality of power receivers disposed on a rotatable object that rotates around a rotation axis and receives the electromagnetic wave. Further, the plurality of power receivers of the wireless power supply system is disposed such that at least one of the plurality of power receivers is located within a coverage area formed by the electromagnetic wave transmitted by the power transmitter.

Wireless power supply system, power transmission device and power receiving device

In order to obtain an electromagnetic transmission device and an electromagnetic transmission system that emit high-power continuous microwaves stably onto a material or an irradiation target in electromagnetic heating systems and electromagnetic power transmission systems that are required to emit electromagnetic waves such as high-power microwaves, the electromagnetic transmission device, the power amplification device, and the electromagnetic transmission system emit, onto an irradiation target, electromagnetic waves that are modulated by a repeating pulse with a predetermined transmission duty cycle, or electromagnetic waves that are modulated by a repeating pulse with a predetermined transmission duty cycle and are amplified.

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Chiyoda-ku, Japan

Yukihiro Homma