Abstract: The trench structure part includes a field plate electrode, a first insulating film, a second insulating film, the second insulating film extending to be more proximate to the first surface than the first insulating film, a gate electrode including a first portion located on the second insulating film, and a second portion located on the first insulating film, the second portion being thicker than the first portion, and a third insulating film. The gate contact part extends from the gate wiring layer toward the second portion and contacts the second portion. The gate contact part is not positioned between the first portion and the gate wiring layer. The first portion is positioned adjacent, in a second direction orthogonal to the first direction, to a lower end portion of the gate contact part contacting the second portion.

Abstract: Included are: a waveguide in which multiple probe inserting holes are provided in a first wall surface, and multiple connection shaft inserting holes are provided in a second wall surface; multiple feed probes each of which is inserted in one of the probe inserting holes, and to a first end of each of which one of multiple circularly polarized element antennas is connected; multiple connection shafts each of which is inserted in one of the connection shaft inserting holes, and a third end of each of which is connected to a second end of one of the feed probes; multiple rotation shafts, a fifth end of each of which is connected to a fourth end of one of the connection shafts; multiple rotation devices each of which rotates one of the rotation shafts; and a control device that individually controls rotation of the rotation devices.

Abstract: Included are: a waveguide in which multiple probe inserting holes are provided in a first wall surface, and multiple connection shaft inserting holes are provided in a second wall surface; multiple feed probes each of which is inserted in one of the probe inserting holes, and to a first end of each of which one of multiple circularly polarized element antennas is connected; multiple connection shafts each of which is inserted in one of the connection shaft inserting holes, and a third end of each of which is connected to a second end of one of the feed probes; multiple rotation shafts, a fifth end of each of which is connected to a fourth end of one of the connection shafts; multiple rotation devices each of which rotates one of the rotation shafts; and a control device that individually controls rotation of the rotation devices.

Abstract: A partial discharge sensor evaluation method includes a first frequency characteristic measuring process in which, in a state where a reference antenna 3 for which a frequency characteristic in an effective height is known and a measuring antenna 2 are installed on a flat ground 1 to be separated by a predetermined distance from each other, a transmission characteristic measurer 4 measures a frequency characteristic of a transmission characteristic between the reference antenna 3 and the measuring antenna 2, and a second frequency characteristic measuring process in which, in a state where a measured antenna 9 is installed inside a cylindrical ground 6 buried in a circular opening 5 formed at a position where the reference antenna 3 has been installed, the transmission characteristic measurer 4 measures the frequency characteristic of the transmission characteristic between the measured antenna 9 and the measuring antenna 2.

Abstract: A partial discharge sensor includes: a first ground (1) that constitutes a closed space (3) to surround a high-voltage wire (2); and a cylindrical branch pipe (4) disposed at the first ground (1) to protrude to an outer space to house with a lid (8) a first metal container (6) having at least one hole through which gas can pass, and having a slit (12) formed on the side to the space (3); at one end of a coaxial wire (7) disposed in the container (6), an outer conductor (9) of the coaxial wire (7) is connected to the first metal container (6) at a portion near the center of the slit (12), and an inner conductor (10) of the coaxial wire (7) is connected to the first metal container (6) at an opposite portion to a position where the outer conductor (9) is connected across the slit (12).

Abstract: A partial discharge sensor is configured to have a metal casing 7 disposed outside flange 2a and 2b and a bowtie antenna 8 disposed inside the metal casing 7 in a direction orthogonal to a circumferential direction of the flanges 2a and 2b to thus receive a signal caused by a partial discharge over a wide band with high sensitivity.

Abstract: A partial discharge sensor includes a top-loading monopole antenna including a disc and a post to be installed even in a branch pipe with a small diameter such that a length between the disc and a structure is adjusted to set thereto a frequency band to be detected.

Abstract: An obstacle detection device includes an air-coupled ultrasonic wave sensor 2 mounted into a penetrating hole 11 of a mounting member 1 with an emitting surface 21a being oriented towards outside the obstacle detection device, and an acoustic matching layer 3 fixed to the emitting surface 21a, to achieve matching between the acoustic impedance of the air-coupled ultrasonic wave sensor 2 and that of the air, in which microcapsules 31 are added to the same material as that of the mounting member 1.

Abstract: A partial discharge sensor evaluation method includes a first frequency characteristic measuring process in which, in a state where a reference antenna 3 for which a frequency characteristic in an effective height is known and a measuring antenna 2 are installed on a flat ground 1 to be separated by a predetermined distance from each other, a transmission characteristic measurer 4 measures a frequency characteristic of a transmission characteristic between the reference antenna 3 and the measuring antenna 2, and a second frequency characteristic measuring process in which, in a state where a measured antenna 9 is installed inside a cylindrical ground 6 buried in a circular opening 5 formed at a position where the reference antenna 3 has been installed, the transmission characteristic measurer 4 measures the frequency characteristic of the transmission characteristic between the measured antenna 9 and the measuring antenna 2.

Abstract: A partial discharge sensor includes: a first ground (1) that constitutes a closed space (3) to surround a high-voltage wire (2); and a cylindrical branch pipe (4) disposed at the first ground (1) to protrude to an outer space to house with a lid (8) a first metal container (6) having at least one hole through which gas can pass, and having a slit (12) formed on the side to the space (3); at one end of a coaxial wire (7) disposed in the container (6), an outer conductor (9) of the coaxial wire (7) is connected to the first metal container (6) at a portion near the center of the slit (12), and an inner conductor (10) of the coaxial wire (7) is connected to the first metal container (6) at an opposite portion to a position where the outer conductor (9) is connected across the slit (12).

Abstract: A first distribution circuit outputs a high frequency signal inputted from an input/output terminal to an input/output terminal and a connecting portion. A second distribution circuit outputs a high frequency signal inputted from an input/output terminal to an input/output terminal and a connecting portion. An end of a transmission line is connected to the connecting portion and the other end of the transmission line is connected to the connecting portion. A first antenna is connected to the input/output terminal, and a second antenna is connected to the input/output terminal.

Abstract: A partial discharge sensor is configured to have a metal casing 7 disposed outside flange 2a and 2b and a bowtie antenna 8 disposed inside the metal casing 7 in a direction orthogonal to a circumferential direction of the flanges 2a and 2b to thus receive a signal caused by a partial discharge over a wide band with high sensitivity.

Abstract: A wireless communication device whose impedance can be matched with an arbitrary load impedance and that can be broadened in operating frequency band even when choosing an input impedance of an IC chip freely is not possible. The wireless communication device includes: a first conductor; a second conductor disposed substantially parallel to the first conductor; a hole formed in the second conductor; a capacitive coupling mechanism disposed adjacent to the hole; and a communication circuit which has at least one of a radio wave transmitting function and a radio wave receiving function. The communication circuit is connected through the capacitive coupling mechanism to two sites on the second conductor that are near borders between the second conductor and the hole.

Abstract: A partial discharge sensor includes a top-loading monopole antenna including a disc and a post to be installed even in a branch pipe with a small diameter such that a length between the disc and a structure is adjusted to set thereto a frequency band to be detected.

Abstract: Provided is a waveguide slot array antenna apparatus having a polarized wave plane in a direction oblique to a tube shaft of a waveguide, in which an excitation distribution of opening portions for radiating or receiving electromagnetic waves is appropriately attained.

Abstract: A radio communication device is obtained which is provided with an RFID tag function which can ensure the mounting area of each antenna as large as possible, and which is sharable with an LF band RFID system or an HF band RFID system and a UHF band RFID system, while having a communication range equivalent to the communication range of each of an LF band an HF band and a UHF band. The device is provided with an integrated circuit (4) having a communication function in a first frequency band, a conductive object (3) connected to one of input and output terminals of the integrated circuit (4), an integrated circuit (5) having a communication function in a second frequency band, and a second conductive object connected between input and output terminals of the integrated circuit (5). The second conductive object is composed of a spiral conductive object (2). The other of the input output terminals of the integrated circuit (4) is connected to a part of the spirally wound conductive object (2).

Abstract: A planar antenna including slot arrays configured to set a narrow interval between elements so as to perform beam scanning in a wide angle range while keeping low loss and low profile. The planar antenna includes: a coaxial line including an inner conductor, an outer conductor provided so as to surround a circumference of the inner conductor, and both ends short-circuited; a feeding mechanism for exciting the coaxial line; and a plurality of slots formed on the outer conductor with a certain angle with respect to a tube direction of the coaxial line and having approximately a resonance length.

Abstract: Provided is a wireless communication device capable of communicating a signal in a first frequency band and a signal in a second frequency band, which is lower in frequency than the first frequency band, including: a plate-like object; a first integrated circuit which has a function of communicating in the first frequency band; a first conductive object which is connected to one of two input/output terminals of the first integrated circuit; a conductive object group constituted of a plurality of second conductive objects at least one of which is connected to another of the two input/output terminals of the first integrated circuit; a second integrated circuit which has a function of communicating in the second frequency band; and a coiled conductive object of which a winding start side is connected to one of two input/output terminals of the second integrated circuit and a winding end side is connected to another of the two input/output terminals of the second integrated circuit.

Abstract: A wireless communication device whose impedance can be matched with an arbitrary load impedance and that can be broadened in operating frequency band even when choosing an input impedance of an IC chip freely is not possible. The wireless communication device includes: a first conductor; a second conductor disposed substantially parallel to the first conductor; a hole formed in the second conductor; a capacitive coupling mechanism disposed adjacent to the hole; and a communication circuit which has at least one of a radio wave transmitting function and a radio wave receiving function. The communication circuit is connected through the capacitive coupling mechanism to two sites on the second conductor that are near borders between the second conductor and the hole.

Abstract: A radio communication device is obtained which is provided with an RFID tag function which can ensure the mounting area of each antenna as large as possible, and which is sharable with an LF band RFID system or an HF band RFID system and a UHF band RFID system, while having a communication range equivalent to the communication range of each of an LF band an HF band and a UHF band. The device is provided with an integrated circuit (4) having a communication function in a first frequency band, a conductive object (3) connected to one of input and output terminals of the integrated circuit (4), an integrated circuit (5) having a communication function in a second frequency band, and a second conductive object connected between input and output terminals of the integrated circuit (5). The second conductive object is composed of a spiral conductive object (2). The other of the input output terminals of the integrated circuit (4) is connected to a part of the spirally wound conductive object (2).