Agc Inc.

Agc Flat Glass North America, Inc.

Kouichirou Takahashi

Osamu Kagaya

Kazuhiko Niwano

Akira Kumagai

Yasuo Morimoto

Koji Ikawa

Takeshi Motegi

Takato Kajihara

Shimpei Morita

Shimpei Nagae

Akiyo Nogami

A protective plate-equipped reflective member includes a reflective member that reflects or re-radiates a radio wave incident thereon; and a protective plate that is installed on a radio wave-incident side of the reflective member, wherein d=α×λ/(1.75×ε) and α is greater than or equal to 1 and less than or equal to 1.25, where a wavelength specified with respect to an operating center frequency f[Hz] is denoted by λ[mm], a plate thickness of the protective plate is denoted by d [mm], a relative permittivity of the protective plate at the operating center frequency f[Hz] is denoted by ε, and a constant is denoted by α.

Protective plate-equipped reflective member

An antenna device including a transparent antenna element that can be provided at a position visible from outside of a transparent cover of an electronic apparatus is provided. An antenna device includes a flexible substrate that is transparent and that is to be provided on an inner surface side opposite to an outer surface of a transparent cover, made of glass or resin, of an electronic apparatus, and an antenna element that is transparent and that is to be provided at a position, of the flexible substrate, that is visible from outside of the transparent cover, the antenna element having a directivity oriented toward an outside of the electronic apparatus.

Antenna device

A radio-wave transmitting substrate includes a dielectric substrate, and, on at least one main surface of the dielectric substrate, a heat-ray reflection film including an electroconductive film, and an opening where the electroconductive film is absent in a plan view. At least a part of the at least one main surface in a plan view is a radio-wave transmitting region. The radio-wave transmitting region is a region where every 1-cm square unit region in the region satisfies the following expression (a): L>802.6×S−503.7. L is an overall length (unit: mm/cm) of a boundary between the heat-ray reflection film and the opening in the unit region, and S is a proportion of an area occupied by the heat-ray reflection film in the unit region.

Radio wave transmissive substrate

An antenna for vehicle for receiving electric waves from a vehicle front side is attached to an internal side of a window glass for vehicle. The antenna includes a first radiator having a shape of a plate, at least a part of the first radiator being arranged separated from the window glass for vehicle; and a second radiator arranged separated from the first radiator, and arranged so as to sandwich at least a part of the first radiator between the second radiator and the window glass for vehicle.

Antenna for vehicle

A MIMO antenna includes a plurality of antenna elements respectively including a plurality of conductive elements that are connected to different feeding points from each other; and one or more base members each being directly or indirectly provided at an upper edge portion of a windshield of a vehicle, the conductive elements being provided at either of the base members, wherein D/W, where 'W' is a width of an open portion of a window frame at which the windshield is provided and 'D' is a minimum distance between the conductive elements of the antenna elements in a direction parallel to the direction of &#x201c;W&#x201d;, is less than or equal to 0.35.

Growing community of inventors

Tokyo, Japan

Kouichirou Takahashi