Hitachi, Ltd.

Other

Hitachi Car Engineering Co., Ltd.

Mitsushige Suzuki

Kazuaki Takano

Terumi Nakazawa

Kazuto Nakamura

Ryuji Fukute

Shirou Oouchi

Hiroshi Kuroda

Tadashi Fujieda

In order to magnetically shield the transmission line which connects the external connector mounted on the outer housing with the internal circuit and also to make it possible to freely mount the external connector without being limited by the position of the internal circuit, an outer housingconsists of an outer housing main bodyand a shielding layerapplied to the inner-periphery surface of the outer housing. An transmission lineextends from the internal circuit through the outer-periphery side of the shielding layerof the outer housingalong the shielding layerto the desired position, where the external connectoris placed.

Vehicle-onboard signal processing device and vehicle-onboard radar system

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.

Millimeter wave-radar and method for manufacturing the same

A millimeter wave radar for the purpose of automatic operation or collision prevention of a vehicle which solves the problem that a side lobe of a transmitted electromagnetic wave is reflected by surrounding bodies and the reflected wave is received, with the result that unnecessary bodies may also be detected. A layer higher in dielectric loss than a radome or a magnetic loss layer and a conductor layer in a mesh form are embedded in a part of the inside surface of the radome, whereby it is possible to provide a millimeter wave radar which is light in weight, excellent in weathering performance, inexpensive, and excellent in detection performance.

Millimeter wave radar

An antenna base, a control circuit section, and a high-frequency circuit section are enclosed in an inner space defined by a housing and a radome. Inside this inner space, the control circuit section and the high-frequency circuit section are surrounded by the antenna base and the housing. A circuit GND common to the control circuit section and the high-frequency circuit section is electrically connected to the antenna base and the housing, and it is connected to a body GND through only capacitive impedance.

Vehicle-mounted radio wave radar

In order to magnetically shield the transmission line which connects the external connector mounted on the outer housing with the internal circuit and also to make it possible to freely mount the external connector without being limited by the position of the internal circuit, an outer housing consists of an outer housing main body and a shielding layer applied to the inner-periphery surface of the outer housing . An transmission line extends from the internal circuit through the outer-periphery side of the shielding layer of the outer housing along the shielding layer to the desired position, where the external connector is placed.

Growing community of inventors

Hitachinaka, Japan

Mitsushige Suzuki