Abstract: According to an embodiment, there is provided a leak preventing device of electromagnetic wave, including a metal pipe and a magnetic material part. The metal pipe is arranged to surround a periphery of a first electric power transmission device. The first electric power transmission device wirelessly transmits electric power to a second electric power transmission device via an electromagnetic wave. The second electric power transmission device is opposed to the first electric power transmission device. An opening is formed on the metal pipe along a circumferential direction of the metal pipe. The magnetic material part is arranged within the metal pipe along the circumferential direction the metal pipe.

Abstract: There is provided an electronic equipment including: a first case that incorporates an electronic component; a second case having a first surface that is common with a surface of the first case, a second surface that has an angle with respect to the first surface and a third surface that has an angle with respect to the second surface; and electric power receiving coils built in parts that face respectively the second surface and the third surface.

Abstract: A transformer between waveguide and transmission-line includes a high-frequency circuit module, transmission-lines, a waveguide, and feed pins. The high-frequency circuit module has differential-pair terminals to input and output a differential signal. The transmission-lines are connected to the differential-pair terminals. The waveguide includes a first to third metal walls. The feed pins are connected to the transmission-lines inside of the waveguide. The feed pins have a first distance of approximately (?g/2) from each other. One of the feed pins has a second distance of approximately (?g*(1+2?)/4) from the third metal plane. “?g” is a wavelength in the waveguide and “?” is an integer which is equal or larger than “0”. Each of the feed pins has a third distance of approximately (a/2) from the first or second wall. “a” is length of the waveguide along the third metal wall.

Abstract: According to one embodiment, there is provided a wireless power transmission device a magnetic core; a coil wound around the magnetic core; and at least one capacitor connected to the coil, wherein a notched part is formed at a part different from a part around which the coil is wound in the magnetic core, and the capacitor is arranged at the notched part or is arranged so as to be opposed to the notched part.

Abstract: According to one embodiment, there is provided a first magnetic core, a coil and a second magnetic core. The first magnetic core includes a first magnetic core including a plurality of first core portions which are arranged with a gap to each other. The coil is wound around the first magnetic core. The second magnetic core includes at least a second core portion which is arranged in the gap between the first core portions or arranged so as to face the gap. A magnetic reluctance of the first magnetic core is lower than a magnetic reluctance of the second magnetic core.

Abstract: According to one embodiment, an antenna device is provided with a dielectric substrate whose both surfaces are covered by first and second metal films, a via-hole row in which via-holes are arranged in two rows on the dielectric substrate, and a waveguide line is formed by the first and the second metal films, and a slot pair provided in the first metal film. The slot pair has a first slot and a second slot provided so that a slot length direction is oblique to a line direction of the waveguide line. A center of the first slot and a center of the second slot are spaced apart from each other by not less than a half of the shorter one of the slot length of the first slot and the slot length of the second slot along the slot length direction.

Abstract: According to one embodiment, a wireless power transmission system includes a first resonator and a second resonator, an adjustment circuit and an adjuster. The first resonator includes a first inductor. The second resonator includes a second inductor. The adjustment circuit includes a third inductor that receives AC power from the first inductor through a coupling with a first mutual inductance, a fourth inductor transmitting the AC power to the second inductor through a coupling with a second mutual inductance, and a capacitor being connected in series with the third inductor and the fourth inductor. The adjuster adjusts at least either one of the first mutual inductance or the second mutual inductance.

Abstract: There is provided a waveguide connecting structure, including first, second, third and fourth waveguides. A first coupling window at one of magnetic field planes of the third waveguide couples the first and third waveguides in such a manner that the electric field planes of both are in parallel. A second coupling window formed at one of the electric field planes of the third waveguide couples the second and third waveguides in such a manner that the electric field planes of the second waveguide is in parallel with the magnetic field planes of the first waveguide. A third coupling window formed at the other one of the electric field planes couples the fourth and third waveguides in such a manner that the electric field planes of the fourth waveguide is in parallel with the magnetic field planes of the first waveguide.

Abstract: There is provided a power transmitting apparatus including: a power supply, a power transmitting inductor, a mutual coupling adjusting unit and a control unit, in which the power supply supplies AC power, the power transmitting inductor transfers the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus, the mutual coupling adjusting unit adjusts a relative position between the power transmitting inductor and the power receiving inductor, and the control unit controls the mutual coupling adjusting unit, based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.

Abstract: There is provided a resonator including a magnetic core and a coil wherein the magnetic core includes a first magnetic core block and a second magnetic core block, the coil is wound on the magnetic core, the first magnetic core block includes a first portion and second portions on sides of the first portion, a sectional area of the first portion is larger than each sectional area of the second portions, the second magnetic core block includes a third portion and fourth portions on sides of the third portion along its longitudinal direction, a sectional area of the third portion is larger than each sectional area of the fourth portions, and the coil is wound on the first portion and the third portion.

Abstract: A transformer between a waveguide and a transmission-line includes a high-frequency circuit module, transmission-lines, a waveguide, and feed pins. The high-frequency circuit module has differential-pair terminals to input and output a differential signal. The transmission-lines are connected to the differential-pair terminals. The waveguide includes first to third metal walls. The feed pins are connected to the transmission-lines inside of the waveguide. The feed pins have a first distance of approximately (?g/2) from each other. One of the feed pins has a second distance of approximately (?g*(1+2?)/4) from the third metal plane. “?g” is a wavelength in the waveguide and “?” is an integer which is equal or larger than “0”. Each of the feed pins has a third distance of approximately (a/2) from the first or second wall. “a” is length of the waveguide along the third metal wall.

Abstract: A transmitter transmits both an electric power signal and an information signal. The electric power signal includes a first frequency. The information signal includes a second frequency different from the first frequency.

Abstract: According to one embodiment, a wireless power transmission system, includes a power transmission antenna and a power reception antenna. The power transmission antenna has a first resonance frequency and a first frequency bandwidth, and wirelessly transmits high-frequency energy having a first transmission frequency. The power reception antenna has a second resonance frequency and a second frequency bandwidth, and wirelessly receives the high-frequency energy. The second resonance frequency is higher than a highest frequency within the first frequency bandwidth. The first transmission frequency falls within the first frequency bandwidth.

Abstract: An antenna device includes subarray antennas including antenna elements, feeding lines and feeding interfaces. At least one of the feeding lines includes a phase shifter which shifts phases of the signals feeding to corresponding antenna elements. The feeding lines feed signals to the antenna elements. Each feeding interface is connected to each of subarray antennas. The subarray antennas are arranged parallel to each other with an interval on a plane to be symmetrical about a central axis. The interval is less or equal than a free-space wavelength. The central axis is along with the center of two adjacent subarray antennas arranged at middle of the subarray antennas when the number of the subarray antennas is even. Moreover, the central axis is along with one subarray antenna arranged at the middle of the subarray antennas when the number of the subarray antennas is odd.

Abstract: An antenna device includes an antenna substrate and a feed line substrate. The antenna substrate includes subarray antennas, feeding interfaces and a back surface. The subarray antennas are arranged parallel with an interval on a plane. Each subarray antenna includes antenna elements and first feed lines. The first feed lines feed signals from the feeding interface on back surface to the antenna elements. The feed line substrate is attached along back surface and includes second feed lines, first and second mode transformers. Each second feed line has one and other ends portions. Other end portion has wider width than one end portion. Each first mode transformer is located in one end portion and connected to the feeding interface. Each second mode transformer is located in other end portion. One end portions are arranged in a line with interval, and other end portions are alternately arranged across one end portions.

Abstract: According to one embodiment, an antenna device is provided with a dielectric substrate whose both surfaces are covered by first and second metal films, a via-hole row in which via-holes are arranged in two rows on the dielectric substrate, and a waveguide line is formed by the first and the second metal films, and a slot pair provided in the first metal film. The slot pair has a first slot and a second slot provided so that a slot length direction is oblique to a line direction of the waveguide line. A center of the first slot and a center of the second slot are spaced apart from each other by not less than a half of the shorter one of the slot length of the first slot and the slot length of the second slot along the slot length direction.

Abstract: A short slot directional coupler includes a dielectric substrate having both surfaces each covered by a metal film, a first via-hole string and a second via-hole string, each of which has via-holes penetrating through the substrate, and formed so that a distance between the first via-hole string and the second via-hole string is narrow at a center of a length direction of the string and wider along directions of both ends of the string, and a pair of third via-hole strings each having via-holes penetrating through the substrate, and formed between parts adjacent to both ends of the first via-hole string and parts adjacent to both ends of the second via-hole string to form a first post-wall waveguide along with the first via-hole string and a second post-wall waveguide along with the second via-hole string.

Abstract: An antenna device includes an antenna substrate and a feed line substrate. The antenna substrate includes subarray antennas, feeding interfaces and a back surface. The subarray antennas are arranged parallel with an interval on a plane. Each subarray antenna includes antenna elements and first feed lines. The first feed lines feed signals from the feeding interface on back surface to the antenna elements. The feed line substrate is attached along back surface and includes second feed lines, first and second mode transformers. Each second feed line has one and other ends portions. Other end portion has wider width than one end portion. Each first mode transformer is located in one end portion and connected to the feeding interface. Each second mode transformer is located in other end portion. One end portions are arranged in a line with interval, and other end portions are alternately arranged across one end portions.

Abstract: An antenna device includes subarray antennas including antenna elements, feeding lines and feeding interfaces. At least one of the feeding lines includes a phase shifter which shifts phases of the signals feeding to corresponding antenna elements. The feeding lines feed signals to the antenna elements. Each feeding interface is connected to each of subarray antennas. The subarray antennas are arranged parallel to each other with an interval on a plane to be symmetrical about a central axis. The interval is less or equal than a free-space wavelength. The central axis is along with the center of two adjacent subarray antennas arranged at middle of the subarray antennas when the number of the subarray antennas is even. Moreover, the central axis is along with one subarray antenna arranged at the middle of the subarray antennas when the number of the subarray antennas is odd.

Abstract: A transformer between waveguide and transmission-line includes a high-frequency circuit module, transmission-lines, a waveguide, and feed pins. The high-frequency circuit module has differential-pair terminals to input and output a differential signal. The transmission-lines are connected to the differential-pair terminals. The waveguide includes a first to third metal walls. The feed pins are connected to the transmission-lines inside of the waveguide. The feed pins have a first distance of approximately (?g/2) from each other. One of the feed pins has a second distance of approximately (?g*(1+2 ?)/4) from the third metal plane. “?g” is a wavelength in the waveguide and “?” is an integer which is equal or larger than “0”. Each of the feed pins has a third distance of approximately (a/2) from the first or second wall. “a” is length of the waveguide along the third metal wall.