Mitsubishi Denki Kabushiki Kaisha

Shigeo Udagawa

Tetsuo Haruyama

Kuniaki Shiramatsu

Takashi Katagi

Nobutake Orime

Yukihir0 Yoshikawa

An array antenna system having a predetermined electric current distribution on an antenna aperture to form a desired shape of antenna beam. Active antenna elements arranged on the aperture transmit a signal for electronically scanning a predetermined region to detect a target and receive a signal reflected by the target. Passive antenna elements are also arranged on the aperture. The antenna system further includes a direction finding section including reception antenna elements which receive an incident signal. The active, passive and reception antenna elements are positioned to allow a predetermine electric current distribution to be established on the antenna aperture.

Array antenna system with direction finding capability

A microstrip antenna offering a wide bandwidth while suppressing the standing wave ratio is obtained by interposing a conductor plate between a radiating conductor element and a ground plane conductor.

Microstrip antenna

Antenna device for detecting a direction of an object lying in a low angle direction, which is constructed with a plurality of antenna elements, feeds, and so forth, and comprises a central feed for feeding RF signals to one or a plurality of central antenna elements, and a peripheral feed for feeding RF signals to a plurality of peripheral antenna elements, and that one of input terminals of the central feed and one of input terminals of the peripheral feed are connected together by a hybrid circuit.

Growing community of inventors

Kanagawa, Japan

Shigeo Udagawa