Yokowo Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Yokow Co., Ltd.

Takayuki Sone

Takeshi Sampo

Satoshi Iwasaki

Hirotoshi Mizuno

Sadao Ohno

Kazuya Matsunaga

Bunpei Hara

Masaki Tsukamoto

Kenji Hayakawa

Yuhei Saito

Taiki Kusukame

A composite antenna device includes a first antenna, plural second antennas whose used frequency bands are different from a used frequency band of the first antenna, and a first conductor portion to serve as a ground plane of the first antenna and the second antennas. Each of the plural second antennas may have a second conductor portion. The first antenna may be provided on the first conductor portion, and at least a portion of the first conductor portion may be positioned between the second conductor portions.

Composite antenna device

An antenna device mounted on a base plate includes an antenna element. The antenna device further includes a base composed of metal, the base being mounted on the antenna device with the antenna element. The antenna device further includes a magnetic body configured to be disposed between the base and the base plate.

Antenna device with a magnetic body

An antenna device () for vehicle, includes a first antenna element () disposed on a ground (), and a second antenna element () disposed on the ground (), and at least a portion of the first antenna element () and at least a portion of the second antenna element () are capacitively coupled.

Antenna device for vehicle

An antenna device to be mounted on a vehicle includes an antenna base; and an antenna element erected on the antenna base, wherein the antenna element includes a proximal end portion fixed on a plane substantially perpendicular to the antenna base and two arm portions extending in directions away from each other from the proximal end portion, and wherein an inductance of at least one of the two arm portions is larger than an inductance of a planer conductor having a same material and a substantially same outer shape. In one embodiment, an inductance of one arm portion of the two arm portions is be smaller than an inductance of the other arm portion.

A multiple-input multiple-output (MIMO) antenna device for spatial multiplexing transmission and that includes: a front side dipole antenna arranged on a front side surface; and a rear side dipole antenna arranged on a rear side surface which faces the front side surface. The front side dipole antenna and the rear side dipole antenna have a same frequency band. The front side dipole antenna includes a front side bowtie antenna, and the rear side dipole antenna includes a rear side bowtie antenna. The front side bowtie antenna or the rear side bowtie antenna includes, at a side surface defined between the front side surface and the rear side surface of the MIMO antenna device, a side surface element portion for adjusting antenna performance which extends from the front side bowtie antenna or the rear side bowtie antenna.

Antenna device

An antenna device includes a patch antenna serving as a first antenna; and a second antenna including capacitance loading elements, the capacitance loading elements being located above the patch antenna and also arranged separately in a predetermined direction. Also, an antenna device includes a patch antenna serving as a first antenna; and a second antenna including capacitance loading elements, the capacitance loading elements being located above the patch antenna, and a slit-like cutout part in a predetermined direction being formed in at least one of side edges of the capacitance loading elements.

An antenna device includes: a pair of first elements that are arranged on a first plane; and a pair of second elements that are arranged on a second plane parallel to the first plane such that a polarized wave direction of the pair of second elements is orthogonal to that of the pair of first elements. Each element of the pair of first elements and the pair of second elements includes a portion that acts as a self-similarity antenna or an antenna that acts based on similar operating principle to the self-similarity antenna. In one embodiment, each element of the pair of first elements and the pair of second elements includes two arms that extend in a direction away from each other from a proximal end portion to which a feed point is connectable.

The antenna device includes: a broadband antenna based on a bow-tie antenna including a first plate-like metal and a second plate-like metal which extend in opposite directions to each other with respect to a feeding point; and a patch antenna provided on a second portion which is bent substantially at a right angle from a first portion of the first plate-like metal which lies near the feeding point. The second portion performs as a ground plate of the patch antenna. A portion including the patch antenna is accommodated in a radome.

A patch antenna includes a patch element and a ground conductor facing the patch element. The patch element is convex toward a side opposite to a side facing the ground conductor. Preferably, the patch element is convex while centering around at least one center line. Here, end portions on both sides of the patch element are positioned across the center line to face each other, and surfaces parallel to a direction toward the ground conductor from the respective end portions on the both sides at the shortest distance intersect or become a same surface.

Patch antenna and antenna device

An antenna device for a vehicle includes: an antenna base to be attached to the vehicle; a first antenna for a first frequency band provided on the antenna base; and a second antenna for a second frequency band provided on the antenna base, in which the first frequency band and the second frequency band are different from each other, and the second antenna serves as a reflector of the first antenna in the first frequency band of the first antenna.

An antenna device for a vehicle includes an antenna board in which a colinear array antenna is constructed by a conductor pattern provided on each of both surfaces of a dielectric substrate. The colinear array antenna includes a first straight portion, a second straight portion, a first connection portion one end of which is connected to the first straight portion, and a second connection portion one end of which is electrically connected to the first connection portion and another end of which is connected to the second straight portion. The first straight portion and the first connection portion are provided on a first surface of the dielectric substrate. The second straight portion and the second connection portion are provided on a second surface of the dielectric substrate opposite to the first surface.

Provided is a linear polarization array antenna device for vehicle that is low-cost and has a high gain, by forming an array antenna and a transmission line by conductor patterns on a substrate. The present invention is provided with: a dipole antenna array in which a plurality of dipole antennas formed by the conductor patterns provided on a dielectric substrate are arranged; and two parallel transmission lines formed by the conductor patterns provided on the dielectric substrate, wherein power is supplied to the dipole antennas via the transmission lines. The two parallel transmission lines have a structure in which a pair of conductor patterns face each other across the dielectric substrate interposed between the pair of the conductor patterns.

A vehicle antenna device includes: an antenna base; an antenna case which is overlaid on the antenna base; and an antenna element and an amplifier board which are disposed inside the antenna case. The antenna base has: a resin-made base which has an opening; and a metal-made base which is smaller in area than the resin-made base, the metal-made base being disposed on the resin-made base so as to close the opening, and having a cylindrical portion for attachment to a vehicle body. A conductor plate is attached to a surface of the resin-made base, the surface being opposite to a placement surface of the metal-made base.

Growing community of inventors

Tomioka, Japan

Takayuki Sone