Mitsubishi Electric Corporation

Fumoto Giken Industry Co., Ltd.

Naoyuki Yamamoto

Satoshi Yamaguchi

Takashi Maruyama

Masataka Otsuka

Toru Fukasawa

Masatake Hangai

Takashi Uesaka

An antenna device includes: a dielectric substrate; a first conductorprovided on a first surface of the dielectric substrate; a second conductorprovided on a second surface of the dielectric substrate, the second surface being opposite to the first surface on which the first conductoris provided, the second conductorhaving a feeding point; a third conductorprovided on the same second surface on which the second conductoris provided; and a pair of transmission lines that electrically connect the second conductorand the third conductor

Antenna device and array antenna device

A signal combiner () specifies a weighting coefficient w for suppressing a grating lobe included in a composite signal Sobtained when combining a digital received signal Sand digital received signal Sstored by a signal calculation storage (), from the gain in a grating lobe direction in a first radiation pattern and the gain in a grating lobe direction in a second radiation pattern, and combines the digital received signal Sand digital received signal Sstored by the signal calculation storage () using the weighting coefficient w.

Antenna device and method for reducing grating lobe

The antenna device includes: an element parthaving an excitation element, a first passive elementhaving first and second conductive partsand, a second passive elementhaving third and fourth conductive partsand, a first switchcontrolling conduction between the first and second conductive parts, and a second switchcontrolling conduction between the third and fourth conductive parts; and a controlleroutputting an electric signal for controlling conduction of the first and second switches. The controller outputs identical DC signal to the first and second switches, and one of the first and second switches is brought into conduction while the other one is brought out of conduction.

The oil draining control valve comprises a valve housing having a fluid passage and a shaft housing; a valve body pivotally housed in the fluid passage of the valve housing; a rotary shaft also rotatably housed in the shaft housing and engaged with the valve body to pivot the valve body from a closed position to an open position or vice versa; a control lever extending outside through a lever guide slot formed in the valve housing and engaged with the rotary shaft to pivot the valve body; and an elastic member for covering the lever guide slot formed in the valve housing at least when the control lever is pivoted at the closed position. The lever guide slot covering member is a C-shape cross-sectional annular ring, a bellow member, or a blade member, which can prevent the lever guide slot from being clogged with muddy water or grass for providing a smooth valve control operation.

Growing community of inventors

Tokyo, Japan

Naoyuki Yamamoto