Abstract: A first layer and a second layer are stacked one another and respectively have different dielectric constants. The dielectric constants are set, such that a first reflected wave and a second reflected wave have a same intensity. A thickness of the first layer is set, such that the first reflected wave and the second reflected wave have a phase difference to at least partially cancel each other. The first reflected wave is reflected on an exposed surface of the first layer when a target radio wave is incident on the exposed surface. The second reflected wave is a reflected wave that is incident from the exposed surface, reflected on a boundary surface between the first layer and the second layer, and emitted from the exposed surface. The exposed surface is on an opposite side of the boundary surface.

Abstract: A radar apparatus includes transmitting means, receiving means, target detection means, and a cover member. The cover member is positioned opposite at least one of the transmitting means and the receiving means, such as to cover at least one of the transmitting means and the receiving means. The cover member is provided with a first face which is positioned opposite at least one of the transmitting means and the receiving means, and a second face which is on an opposite side from the first face and is not parallel to the first face.

Abstract: A waveguide slot antenna includes a waveguide having a plurality of slots spaced apart by a predefined distance in a central-axis direction of the waveguide, as a radiating section. An uneven section provided on an outer wall surface around the radiating section has a periodic concave-convex pattern extending from the radiating section. The uneven section includes a plurality of protrusions spaced apart by a predefined distance in a dispersed manner in each of an axis direction parallel to the central-axis of the waveguide in which the plurality of slots are arranged and an axis direction orthogonal to the central-axis of the waveguide, and grooves between the protrusions. The plurality of protrusions and the grooves causes incident waves incident from forward in a direction of radiation of radio waves emitted from the radiating section to be reflected in a direction different from an incident direction of the incident waves.

Abstract: An antenna device includes a dielectric substrate, a ground plate arranged on a first surface of the dielectric substrate, an antenna part arranged on a second surface of the dielectric substrate, and a reflecting part. The reflecting part is arranged around the antenna part and has a plurality of conductor patches each functioning as a reflecting plate. The plurality of conductor patches form a plurality of blocks aligned along a predetermined block arrangement direction. The plurality of blocks are configured such that phases of reflected waves at an operating frequency are different for each of the blocks and phase differences of reflected waves between adjacent blocks are non-uniformly different for each of the adjacent blocks.

Abstract: A dielectric substrate includes a plurality of pattern layers. A ground plate to be used as a ground plane is formed in a first pattern layer of the dielectric substrate. A functional unit includes a plurality of conductive patches that are parasitic patterns formed in a second pattern layer different from the first pattern layer. The conductive patches are periodically arranged, and sides of the conductive patches along at least one direction are set at a length to cause resonance of a radio wave that propagates through a surface of the dielectric substrate.

Abstract: A radar apparatus includes an antenna unit and a cover unit. The cover unit is arranged at a position through which an electromagnetic wave sent and received by the antenna unit passes. The cover unit has, in an order from closer to the antenna unit, a first dielectric layer formed of a dielectric and a second dielectric layer formed of a dielectric having a dielectric constant different from that of the first dielectric layer. The first dielectric layer is configured to have a thickness not more than that for a maximum external transmittance. The external transmittance indicates a transmittance of an electromagnetic wave, which is emitted in a direction of an incidence angle with respect to the first dielectric layer, which is equal to a maximum sensing angle, when the electromagnetic wave is transmitted through the cover unit.

Abstract: A broadband planar array antenna in one aspect of the present disclosure includes: a multi-layer board; a plurality of patch antenna patterns; and a transmission line that connects the plurality of patch antenna patterns in series. The distance from the transmission line to an end of each of the plurality of patch antenna patterns along the polarization direction of a radiated radio wave is shorter with increasing proximity to a feeding point of the transmission line.

Abstract: A radar apparatus that detects an object using radiated waves includes: an antenna surface that includes an element unit that emits a radiated wave for a radar; and a cover member that covers the antenna surface to protect the element unit. The cover member includes an inner refractive surface that is an inner side surface of the cover member on which an undesired wave is incident and is formed into a shape that refracts the undesired wave incident on the inner refractive surface so as to advance towards antenna rear. The antenna rear is a side opposite an antenna front that is a side on which the radiated wave is emitted, with the antenna surface as a boundary. Undesired waves are radiated waves that are emitted outside a range of a predetermined solid angle relative to a normal direction of the antenna surface from a center of the antenna surface from which the radiated waves are emitted.

Abstract: An antenna device includes a dielectric substrate, a ground plane, an antenna unit, a reflection unit, and an interruption unit. The interruption unit includes a plurality of second conductor patches disposed around the antenna unit, and a plurality of through-holes permitting electrical conduction between each of the second conductor patches and the ground plane, and interrupts a surface current flowing on a surface of the dielectric substrate.

Abstract: An antenna apparatus includes a dielectric substrate, a base plate, an antenna unit, and a reflecting unit. A plurality of conductor patches are structured to resonate, at an operating frequency of the antenna unit, in a resonating direction which is different from a polarization direction Dan of a radio wave transmitted and received by the antenna unit.

Abstract: A radar apparatus is provided which includes an antenna section that is configured to radiate radio waves based on fed electrical power, a plate dielectric member that is provided so as to transmit the radio waves radiated from the antenna section, a filter portion that is provided to the dielectric member and includes a plurality of band transmission portions arranged along a scanning direction, the plurality of band transmission portions being configured to respectively transmit radio waves within different specific transmission frequency bands, and a power feeding section that is configured to feed the electrical power to the antenna section and is configured to set specific frequency bands included in the respective specific transmission frequency bands to set radiation bands and sequentially change a frequency of the radio waves radiated from the antenna section to frequencies within the respective set radiation bands.

Abstract: An antenna apparatus includes a dielectric substrate, a base plate, an antenna unit, and a reflecting unit. A plurality of conductor patches are structured to resonate, at an operating frequency of the antenna unit, in a resonating direction which is different from a polarization direction Dan of a radio wave transmitted and received by the antenna unit.

Abstract: A radar apparatus is provided with transmitting means, receiving means, target detection means, azimuth detection means and a cover member. The cover member has a first face and a second face. The first face and second face are not parallel to one another. At least one of the first face and second face is a curved surface which is curved along azimuth detection directions of the azimuth detection means, such as to provide a large phase difference between incoming waves that are received by a plurality of antenna elements and are from within a range of large angular values in the azimuth detection directions of the azimuth detection means.

Abstract: An antenna apparatus has an antenna unit. The antenna unit transmits or receives a probe wave made of an electromagnetic wave. A magnet is disposed at a location through which the probe wave to be received by the antenna unit passes. The magnet works to generate a magnetic field along a direction in which the probe wave propagates. A polarizing filter is arranged on an opposite side of a magnetic body to the antenna unit. This minimizes the interference between an emitted wave and a reflected wave created by a cover, such as a bumper, regardless of the configuration of the cover.

Abstract: A vehicle lamp includes a projector lens, a first light source disposed behind the projector lens and configured to emit light for forming a low-beam light distribution pattern, a second light source disposed behind the projector lens and configured to emit light for forming an additional high-beam light distribution pattern, and a metal base member. The base member includes a first surface on which the first light source is disposed and a second surface on which the second light source is disposed. The second surface is inclined with respect to an optical axis such that an emission portion of the light emitting element faces obliquely forward and upward. A plurality of metal plate-shaped fins extending in a left-right direction and an upper-lower direction of the lamp are arranged along a front-rear direction of the lamp on a rear surface of the first and second surfaces.

Abstract: A radar apparatus includes transmitting means, receiving means, target detection means, and a cover member. The cover member is positioned opposite at least one of the transmitting means and the receiving means, such as to cover at least one of the transmitting means and the receiving means. The cover member is provided with a first face which is positioned opposite at least one of the transmitting means and the receiving means, and a second face which is on an opposite side from the first face and is not parallel to the first face.

Abstract: An antenna apparatus includes a dielectric substrate, a base plate, an antenna unit, and a reflecting unit. A plurality of conductor patches are structured to resonate, at an operating frequency of the antenna unit, in a resonating direction which is different from a polarization direction Dan of a radio wave transmitted and received by the antenna unit.

Abstract: A radar apparatus is provided which includes an antenna section that is configured to radiate radio waves based on fed electrical power, a plate dielectric member that is provided so as to transmit the radio waves radiated from the antenna section, a filter portion that is provided to the dielectric member and includes a plurality of band transmission portions arranged along a scanning direction, the plurality of band transmission portions being configured to respectively transmit radio waves within different specific transmission frequency bands, and a power feeding section that is configured to feed the electrical power to the antenna section and is configured to set specific frequency bands included in the respective specific transmission frequency bands to set radiation bands and sequentially change a frequency of the radio waves radiated from the antenna section to frequencies within the respective set radiation bands.

Abstract: An element section includes at least one antenna element transmitting/receiving radio waves. Refracting sections refract unnecessary waves, which are radio waves emitted from the element section and traveling away from a detection area, in a rearward direction in which the unnecessary waves travel further than an antenna-formed surface having the at least one antenna element of the element section.

Abstract: A surface current suppression filter (1) is a bandstop filter that suppresses propagation of a surface current in a predetermined propagation direction on a dielectric substrate (2). The filter (1) is configured such that a plurality of electromagnetic band gap (EBG) rows (10, 20) are arrayed in an array direction. Each EBG row (10, 20) has at least one EBG (11, 21) that is arrayed in a perpendicular direction orthogonal to the array direction. Cutoff characteristics of a first EBG (11) in the first EBG row (10) differs from cutoff characteristics of a second EBG (12) in the second EBG row (20).