Mitsubishi Electric Corporation

Takashi Takanezawa

Noboru Kawaguchi

Tomohiro Mizuno

Hiroto Ado

Hidenobu Nishihara

An antenna device includes a main-reflector including a main-reflector hole, an additional main-reflector, a sub-reflector, and an additional sub-reflector. The main-reflector surrounds an outer edge of the additional main-reflector, and has a reflective surface on the same side as the additional main-reflector. The sub-reflector faces the main-reflector hole on the reflective surface side of the additional main-reflector, and has a reflective surface facing the reflective surface of the additional main-reflector. The additional sub-reflector surrounds an outer edge of the sub-reflector, and has a reflective surface on the same side as the sub-reflector. The main-reflector reflects an incident electromagnetic wave toward the additional sub-reflector, the additional sub-reflector reflects toward the additional main-reflector the electromagnetic wave reflected by the main-reflector, the additional main-reflector reflects toward the sub-reflector the electromagnetic wave reflected by the additional sub-reflector, and the sub-reflector reflects toward the reflector hole the electromagnetic wave reflected by the additional main-reflector.

Growing community of inventors

Chiyoda-ku, Japan

Takashi Takanezawa