Mitsubishi Denki Kabushiki Kaisha

Kazuhisa Henmi

Muneaki Mukuda

Hideki Asao

Naofumi Yoneda

Takayuki Inuzuka

Yukihiro Tahara

Hideo Ogawa

Hideyuki Oohashi

Yukitsugu Yoshino

Naosi Yamada

A method of manufacturing a waveguide includes forming two waveguide units, each waveguide unit having a channel defined by a bottom wall and two side walls generally transverse to the bottom wall, flanges extending from the side walls, outside the groove, transverse to the side walls and generally parallel to the bottom wall, the flanges including though holes; joining the two waveguide units to each other so that the flanges of a first of the waveguide units abut the flanges of a second of the waveguide units, with the grooves forming a channel for guiding waves; and, by insert molding, forming a thermoplastic resin cover that fills the through holes in the flanges and covers both of the first and second waveguide units, at least partially.

Method of manufacturing a waveguide

A nonreflective waveguide terminator includes a waveguide portion and an electromagnetic wave absorber. The portion has a rectangular opening in a plane perpendicular to a radio-wave propagation direction. The portion has one open end in the direction and the other end closed by a terminating metal internal wall. The portion has a radio-wave propagation space surrounded by first and second metal internal walls parallel to a radio-wave electric field, and third and fourth metal internal walls perpendicular to the field. The exterior shape of the absorber is a parallelepiped. The absorber has a rear-end surface positioned at a predetermined distance from the terminating wall and parallel to the terminating wall or is provided against the terminating wall. The surface of the absorber having the largest rectangular area is on the third or the fourth metal internal wall.

Nonreflective waveguide terminator and waveguide circuit

Growing community of inventors

Tokyo, Japan

Kazuhisa Henmi