Patent ID: 8570212

Claim:
A waveguide converter, comprising: a first waveguide configured to propagate an electromagnetic wave in a first direction; a second waveguide configured to receive, as an input, the electromagnetic wave from the first waveguide and configured to propagate the input electromagnetic wave in a second direction different from the first direction; an elongated-plate-shaped inner conductor arranged between the first waveguide and the second waveguide such that end portions of the inner conductor are exposed to an inside of the first waveguide and an inside of the second waveguide; and an insulator, including a cylindrical portion that fits onto at least a part of the second section, configured to electrically insulate the inner conductor from inside walls of the first waveguide and inside walls of the second waveguide; the inner conductor having a first section of a first width, the first section being exposed to the inside of the first waveguide, a second section of a second width, the second section being exposed to the inside of the second waveguide, and a convex portion in a part of the first section, and the first width being wider than the second width.