Abstract: A leakage voltage detection system can be easily mounted on a ground structure such as an existing street light or a traffic light and can detect a leakage voltage of an electric structure in real time. The leakage voltage detection system includes a sensor node mounted on a ground structure, and an equipment management server that determines a risk of a leakage voltage in the ground structure based on detection voltage information from the sensor node. The sensor node includes an electric field probe that measures a potential difference caused by an electric field detected by electrodes, and a sensor box that detects the potential difference between the electrodes of the electric field probe and transmits the potential difference to the equipment management server as a detection voltage.

Abstract: A reception power supplying unit generates each of reception signals before and after a switching operation. A signal processing circuit generates each of difference signals before and after the switching operation on the basis of the reception signal and a reference signal. A phase difference detector calculates, as a transmission phase difference, the phase difference between transmission power supplying units on the basis of the respective difference signals, and adjusts a phase shift amount on the basis of the transmission phase difference and a set phase difference that is previously set.

Abstract: The present invention provides an antenna comprising: a radiation unit that is formed on a substrate; a waveguide that propagates therein radio waves radiated from the radiation unit and radiates the radio waves as a beam; and a dielectric lens that is arranged in an opening of the waveguide and has an incident plane facing the radiation unit and a radiation plane radiating radio waves entered from the incident plane. The radiation plane of the dielectric lens has a plane orientation different from a flat plane perpendicular to the radiation direction of the beam.

Abstract: A leakage voltage detection system can be easily mounted on a ground structure such as an existing street light or a traffic light and can detect a leakage voltage of an electric structure in real time. The leakage voltage detection system includes a sensor node mounted on a ground structure, and an equipment management server that determines a risk of a leakage voltage in the ground structure based on detection voltage information from the sensor node. The sensor node includes an electric field probe that measures a potential difference caused by an electric field detected by electrodes, and a sensor box that detects the potential difference between the electrodes of the electric field probe and transmits the potential difference to the equipment management server as a detection voltage.

Abstract: The present invention is an antenna provided with: a plurality of radiating parts formed on a base plate; a waveguide tube inside of which radio waves emitted from the radiating parts propagate; a lens having a plurality of curved surfaces having a substantially hyperbolic shape and disposed in an opening of the waveguide tube; and a protruding part formed in a tapered shape between the plurality of radiating parts. The tip of the protruding part is formed at a position lower than an opening surface.

Abstract: Provided is an antenna which includes a plurality of radiating portions which are formed on a substrate and a plurality of dielectric lenses for respectively converting a spherical wave radiated from each radiating portion into a plane wave, wherein the shape of a cross section of each dielectric lens perpendicular to a radiation direction of a beam is formed in a shape which radiates a beam which is narrower in a second direction than in a first direction orthogonal to the second direction, and the plurality of dielectric lenses are arranged side by side in the second direction so that beams radiated from the respective dielectric lenses are synthesized.

Abstract: The present invention provides an antenna comprising: a radiation unit that is formed on a substrate; a waveguide that propagates therein radio waves radiated from the radiation unit and radiates the radio waves as a beam; and a dielectric lens that is arranged in an opening of the waveguide and has an incident plane facing the radiation unit and a radiation plane radiating radio waves entered from the incident plane. The radiation plane of the dielectric lens has a plane orientation different from a flat plane perpendicular to the radiation direction of the beam.

Abstract: A sensor has an antenna. The antenna includes a radiation source and a wave guide. The radiation source is formed on a substrate. The wave guide internally propagates electromagnetic waves radiated from the radiation source and radiates the electromagnetic waves as a beam. The wave guide has a radiation-side opening in which a first direction and a second direction are orthogonal to each other, and the second direction is longer than the first direction. In a cross-sectional shape of the beam, perpendicular to a radiation direction of the beam radiated from the wave guide, a first direction and a second direction are orthogonal to each other, and the second direction is narrower than the first direction.

Abstract: A reception power supplying unit generates each of reception signals before and after a switching operation. A signal processing circuit generates each of difference signals before and after the switching operation on the basis of the reception signal and a reference signal. A phase difference detector calculates, as a transmission phase difference, the phase difference between transmission power supplying units on the basis of the respective difference signals, and adjusts a phase shift amount on the basis of the transmission phase difference and a set phase difference that is previously set.

Abstract: Provided is an antenna which includes a plurality of radiating portions which are formed on a substrate and a plurality of dielectric lenses for respectively converting a spherical wave radiated from each radiating portion into a plane wave, wherein the shape of a cross section of each dielectric lens perpendicular to a radiation direction of a beam is formed in a shape which radiates a beam which is narrower in a second direction than in a first direction orthogonal to the second direction, and the plurality of dielectric lenses are arranged side by side in the second direction so that beams radiated from the respective dielectric lenses are synthesized.

Abstract: Proposed is a millimeter-wave band communication device which does not generate spatial resonance in a cover shielding unnecessary radio waves from the outside. Disclosed is a millimeter-wave band communication device including: a substrate; a radio frequency circuit element for a millimeter-wave band provided on the substrate; and a cover made of a bulk material that covers at least a part of the radio frequency circuit element and a surface of the substrate, the cover being formed by blending a dielectric loss material in a base.

Abstract: A millimeter-wave antenna includes a slit which is provided in a GND conductor formed in a first surface of a circuit board, a horn antenna which is provided with a first opening and a second opening, and an impedance matching device which is provided in a slot shape between the slit and the first opening of the horn antenna. The impedance matching device is formed in the slot shape which is filled with a dielectric having a dielectric constant different from that of the circuit board. The impedance matching device is configured such that a length of the slot shape in a propagation direction is less than ¼ of a wavelength of a use frequency upper limit. The impedance matching device is configured such that a size of a rectangular shape of the slot shape in a magnetic field direction is larger than the first opening of the horn antenna.

Abstract: The present invention is an antenna provided with: a plurality of radiating parts formed on a base plate; a waveguide tube inside of which radio waves emitted from the radiating parts propagate; a lens having a plurality of curved surfaces having a substantially hyperbolic shape and disposed in an opening of the waveguide tube; and a protruding part formed in a tapered shape between the plurality of radiating parts. The tip of the protruding part is formed at a position lower than an opening surface.

Abstract: Proposed is a millimeter-wave band communication device which does not generate spatial resonance in a cover shielding unnecessary radio waves from the outside. Disclosed is a millimeter-wave band communication device including: a substrate; a radio frequency circuit element for a millimeter-wave band provided on the substrate; and a cover made of a bulk material that covers at least a part of the radio frequency circuit element and a surface of the substrate, the cover being formed by blending a dielectric loss material in a base.

Abstract: A millimeter-wave antenna includes a slit which is provided in a GND conductor formed in a first surface of a circuit board, a horn antenna which is provided with a first opening and a second opening, and an impedance matching device which is provided in a slot shape between the slit and the first opening of the horn antenna. The impedance matching device is formed in the slot shape which is filled with a dielectric having a dielectric constant different from that of the circuit board. The impedance matching device is configured such that a length of the slot shape in a propagation direction is less than 1/4 of a wavelength of a use frequency upper limit. The impedance matching device is configured such that a size of a rectangular shape of the slot shape in a magnetic field direction is larger than the first opening of the horn antenna.

Abstract: A sensor has an antenna. The antenna includes a radiation source and a wave guide. The radiation source is formed on a substrate. The wave guide internally propagates electromagnetic waves radiated from the radiation source and radiates the electromagnetic waves as a beam. The wave guide has a radiation-side opening in which a first direction and a second direction are orthogonal to each other, and the second direction is longer than the first direction. In a cross-sectional shape of the beam, perpendicular to a radiation direction of the beam radiated from the wave guide, a first direction and a second direction are orthogonal to each other, and the second direction is narrower than the first direction.

Abstract: To provide a radar module used for a speed measuring device or the like, in which dispersion of intensity distribution of electromagnetic waves emitted from the radar module via a lens is small, the radar module using a substrate with a plane antenna formed on a surface of the substrate includes: a lens having one end face that is plane and another end face that is spherical. In the radar module, a plane side of the lens is disposed to contact the plane antenna, and a spherical side of the lens is disposed in a remote field of the plane antenna.

Abstract: A speed sensor which aligns a normal direction of one patch antenna which is disposed on a mounted board, and an optical axis of a dielectric lens uses a frame for inclining a sensor module, in order to obtain a component cos ? in a traveling direction when the speed sensor is installed on a horizontally vertical surface of an automobile or a railway car. When beams are condensed by using the one patch antenna and the cannonball-shaped dielectric lens, the dielectric lens is inclined and a bottom surface portion of the lens is cut with a plane parallel with a surface of the antenna-mounted board. The one patch antenna is configured by one patch and a GND electrode and the gain center of radiation characteristics is a normal direction of the antenna board. However, the radiation characteristics have a substantially hemisphere surface wave shape.

Abstract: Signals are maintained to be in phase at beam input ports of a Rotman lens antenna, and thus scanning at non-step antenna beam angles can be realized without increasing the number of input beams. The present invention provides an antenna beam scan module including: a Rotman lens that has plural beam ports and plural antenna ports; plural antenna elements; relative phase detectors that detect a relative phase difference between the signals input to the adjacent beam ports; phase shifters that offset the relative phase difference between the signals supplied to the adjacent beam ports on the basis of the relative phase difference detected by the relative phase detectors; and switches that select routes of the signals supplied to the beam ports through variable amplifiers, wherein the phase shifters are arranged on alternate routes through which the signals are supplied to the plural beam ports.

Abstract: There is provided a plasma processing apparatus that can generate uniform plasma without increasing costs per unit electric power even though the discharge area is increased to adapt to samples in given sizes by arranging a plurality of plasma discharge units. A plasma processing apparatus includes an RF power supply having an RF signal circuit and an RF power circuit, a case, and a discharge electrode. A plasma module is configured of the discharge electrode and the RF power circuit provided in the case. A frequency signal from the RF signal circuit is inputted to a plurality of the plasma modules connected in parallel with each other.