WAVEGUIDE CONNECTION STRUCTURE, WAVEGUIDE CONNECTOR, MODE CONVERTER, AND WAVEGUIDE UNIT

To provide a waveguide connection structure that can prevent the loss of radio waves when connecting the waveguide with an outer conductor having a braided structure to another component.SOLUTION: The waveguide connection structure has a rod-shaped dielectric 11 and an outer conductor 12 formed by braiding a plurality of conductive flat foil yarns around the rod-shaped dielectric 11. A three-dimensional component 30 has a connection surface 33 having at least partly a conductive area to which a connection enlargement portion 22 of the outer conductor 12 is connected, an insertion hole 31 having conductivity over the entire inner circumference thereof, and a conductive corner 32 which is an opening edge over the entire circumference of the insertion hole 31 in the connection surface 33 and which is electrically connected to the inner surface of the insertion hole 31. In a connection state between the waveguide and the three-dimensional component 30, the connection enlargement portion 22 is configured to be electrically conductive to the inner surface of the insertion hole 31 through an electrical connection to the connection surface 33 and the corner 32 and to have a smooth connection at the corner 32.SELECTED DRAWING: Figure 1A 【課題】組紐状の構造を持つ外導体を備えた導波管を他の部材に接続する際に、電波のロスを防止することができる導波管の接続構造を提供する。【解決手段】導波管の接続構造は、棒状の誘電体１１と、棒状の誘電体１１の周囲に導電性を有する複数の平箔糸を組紐状に組んで形成された外導体１２とを有する。立体部品３０は、外導体１２の接続拡大部２２が接続する導電性領域を少なくとも一部に有する接続面３３と、内面全周に渡り導電性を有する挿入孔３１と、接続面３３における挿入孔３１の全周に渡る開口縁であり、挿入孔３１の内面と導通する導電性を有する角部３２と、を有する。導波管と立体部品３０の接続状態において、接続拡大部２２は接続面３３および角部３２に対する電気的接続を通じて挿入孔３１内面と電気的に導通し、かつ、角部３２における接続が滑らかになるように構成されている。【選択図】図１Ａ