Waveguide structure, antenna apparatus that uses that waveguide structure, and vehicle radar apparatus in which a waveguide structure or an antenna apparatus is used

Abstract

The present invention provides a waveguide structure that prevents occurrences of gaps that communicate between internal and external portions of a waveguide without increasing energy transmission loss of high frequency signals, that is low cost, that has superior durability, and that is compact. The waveguide structure includes: a base that has a mounting surface; a metal plate member that has elasticity, that is stacked on the mounting surface, and that functions together with the base to constitute a waveguide; a positioning mechanism that is constituted by: a positioning pin that is disposed so as to protrude from the base; and an interfitting portion that is formed on the plate member, and that is fitted together with the positioning pin, the positioning mechanism positioning the plate member on the mounting surface of the base and also restricting movement along the mounting surface by fitting together of the positioning pin and the interfitting portion; and a holder that holds the plate member in a state of close contact with the mounting surface by pressing the plate member so as to generate a reaction force in the plate member.

Dependencies are inferred from the claim text.