Abstract: An antenna apparatus is equipped with a plurality of antennas arrayed in line. Ones of the antennas which lie at ends of the array of the antennas are referred to as end-side antennas, while the other antennas are referred to as inner antennas. The end-side antennas have a structure different from that of the inner antennas so as to decrease a difference in directionality between the antennas used as feed elements, thereby improving the accuracy in determining an arrival direction in a simple way without increasing an amount of calculation.

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: 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 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 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: 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: 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: 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: An antenna device includes: a dielectric substrate formed with a ground plane; a patch antenna having a dominant polarization direction in a predetermined direction on the dielectric substrate; at least one patch radiating element for supplying electric power provided on the patch antenna, the at least one patch radiating element being formed on the dielectric substrate; a patch-shaped conductor pattern formed on a substrate front face of the dielectric substrate on which the patch radiating element is formed; a plurality of connection conductors formed to penetrate the dielectric substrate for electrically connecting the conductor pattern to the ground plane; and a conductive structure having the conductor pattern and a plurality of the connection conductors. A plurality of the conductive structures is provided.

Abstract: An antenna apparatus is equipped with a plurality of antennas arrayed in line. Ones of the antennas which lie at ends of the array of the antennas are referred to as end-side antennas, while the other antennas are referred to as inner antennas. The end-side antennas have a structure different from that of the inner antennas so as to decrease a difference in directionality between the antennas used as feed elements, thereby improving the accuracy in determining an arrival direction in a simple way without increasing an amount of calculation.

Abstract: A radar device is equipped with a radar emitting section, a radar input section, a detector, and a cover. The radar emitting section radiates an electromagnetic wave. The radar input section receives a return of the electromagnetic wave from an object. The detector works to detect the object using the return of the electromagnetic wave inputted to the radar input section. The cover covers an object portion that is at least one of the radar emitting section and the radar input section. The cover is designed to have a convex lens formed on a portion of the cover through which the electromagnetic wave passes to the object portion. The cover is made in the form of a radome. The structure of such a radome serves to decrease the power consumption of the radar device.

Abstract: An antenna device 1 has a dielectric substrate 2, a patch antenna 5 and electric power absorbing passive elements 21, 24 formed on a surface of the dielectric substrate. Each electric power absorbing passive element 21, 24 is formed between the patch antenna 5 and an edge portion in a polarized wave direction of the dielectric substrate 2. The electric power absorbing passive elements 21, 24 absorb a part of electric power received by the patch antenna 5. This makes it possible to suppress a surface current flowing to the edge portions of the dielectric substrate on a conductive plate (a front-surface conductor plate 3 or a back surface conductor plate 4) on the dielectric substrate.

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: An antenna apparatus includes: an antenna that performs either transmission or reception of electromagnetic waves having a predetermined frequency; a case provided with a mounting surface on a predetermined surface, mounting the antenna on the mounting surface; a radome formed of a transmissive material allowing the electromagnetic waves to pass therethrough, mounted on the mounting surface so as to cover the antenna. A groove portion is formed on the mounting surface. The radome has a thickness corresponding to a value of ½ wavelength of the electromagnetic waves propagating therethrough multiplied by m, where m is positive integer number. The groove portion is formed in a direction forming a predetermined angle with respect to a normal direction of an opening surface of the antenna, to have a depth defined as ½ wavelength of the electromagnetic waves propagating in the groove portion multiplied by n, where n is positive integer number.

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 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: 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).

Abstract: An antenna apparatus includes a dielectric substrate, a ground plate, a patch antenna provided with a patch radiating element, and a plurality of EBGs (Electromagnetic Band Gaps). The EBGs are composed of patch-shaped patterns formed on a surface of the substrate and connecting conductors electrically connecting the patch-shaped patterns and the ground plate. Each EBG is arranged to provide an EBG absent region having no EBG on the surface of the substrate. The patch radiating element is arranged within the EBG absent region. The EBG absent region is formed such that distances (absent distances) in a dominant polarized wave direction changes into a plurality of types depending on the position on a vertical patch line, where the distances range, to the boundary of the region, from an arbitrary position on the virtual patch line which is perpendicular to the dominant polarized wave direction of the patch antenna.

Abstract: An antenna apparatus includes: an antenna that performs either transmission or reception of electromagnetic waves having a predetermined frequency; a case provided with a mounting surface on a predetermined surface, mounting the antenna on the mounting surface; a radome formed of a transmissive material allowing the electromagnetic waves to pass therethrough, mounted on the mounting surface so as to cover the antenna. A groove portion is formed on the mounting surface. The radome has a thickness corresponding to a value of ½ wavelength of the electromagnetic waves propagating therethrough multiplied by m, where m is positive integer number. The groove portion is formed in a direction forming a predetermined angle with respect to a normal direction of an opening surface of the antenna, to have a depth defined as ½ wavelength of the electromagnetic waves propagating in the groove portion multiplied by n, where n is positive integer number.

Abstract: An antenna device includes: a dielectric substrate formed with a ground plane; a patch antenna having a dominant polarization direction in a predetermined direction on the dielectric substrate; at least one patch radiating element for supplying electric power provided on the patch antenna, the at least one patch radiating element being formed on the dielectric substrate; a patch-shaped conductor pattern formed on a substrate front face of the dielectric substrate on which the patch radiating element is formed; a plurality of connection conductors formed to penetrate the dielectric substrate for electrically connecting the conductor pattern to the ground plane; and a conductive structure having the conductor pattern and a plurality of the connection conductors. A plurality of the conductive structures is provided.