Millimeter wave-radar and method for manufacturing the same
AssigneesHitachi, Ltd., Hitachi Car Engineering Co., Ltd.
InventorsMitsushige Suzuki, Kazuaki Takano
Life of this patent
Estimating the term…
Abstract
A millimeter-wave radar has a radome or radar cover including a layer, the dielectric constant of which is a greater than that of the other portion without the layer, or including a magnetic loss layer in an appropriate position with respect to the antenna. The dielectric constant of the radome or radar cover can be made higher in a portion corresponding to the side of the antenna than in a portion corresponding to the front of the antenna.
Claims16
A millimeter wave-radar comprising:
- an antenna base having a transmission/reception antenna;
- a housing fixing the antenna base;
- and
- at least a radome or a radar cover enclosing the antenna base;
- wherein the radome or the radar cover has a dielectric constant which progressively increases from a front of the transmission/reception antenna toward a side of the antenna.
A millimeter wave-radar comprising:
- an antenna base having a transmission/reception antenna;
- a housing fixing the antenna base;
- and
- at least a radome or a radar cover enclosing the antenna base;
- wherein the radome or the radar cover is provided with a radio wave absorbing layer formed through an insert molding process or a double molding process;
- and
- wherein the radome or the radar cover has a greater dielectric constant in a portion thereof corresponding to a side of the transmission/reception antenna than in a portion thereof corresponding to a front of the antenna.
A millimeter wave-radar comprising:
- an antenna base having a transmission/reception antenna;
- a housing fixing the antenna base;
- and
- at least a radome or a radar cover enclosing the antenna base;
- wherein the radome or the radar cover has a dielectric constant which progressively increases from a front of the transmission/reception antenna toward a side of the antenna, and wherein the radome and the radar cover use in a portion thereof corresponding to a front of the transmission/reception antenna a material with a dielectric constant of 3.0 or lower.
A millimeter wave-radar comprising:
- an antenna base having a transmission/reception antenna;
- a housing fixing the antenna base;
- and
- at least a radome or a radar cover enclosing the antenna base;
- wherein the radome or the radar cover has a dielectric constant which progressively increases from a front of the transmission/reception antenna toward a side of the antenna, and wherein the radome and the radar cover use, as a main ingredient in a portion thereof corresponding to a front of the transmission/reception antenna, at least one of polycarbonate, syndiotactic polystyrene, polypropylene and a combination of these materials as a main ingredient and acrylonitrile butadiene styrene (ABS).
A millimeter wave-radar comprising:
- an antenna base having a transmission/reception antenna;
- a housing fixing the antenna base;
- and
- at least a radome or a radar cover having an electronic permeability which progressively decreases from a front of the transmission/reception antenna toward a side of the antenna.
Dependencies are inferred from the claim text.