Patent ID: 6850205
Filing Date: 2005-02-01
Classification: H01Q

Abstract:
1. A waveguide antenna apparatus comprising: a rectangular waveguide having one end short-circuited by a terminating conductor and another end opened, said rectangular waveguide including a grounding conductor and a ceiling conductor that are opposed to each other, and further including two side surface conductors that join said grounding conductor with said ceiling conductor and are opposed to each other; and an antenna element having one end and another end, one end of said antenna element being electrically connected with a position in said ceiling conductor in a vicinity of opened another end of said rectangular waveguide, another end of said antenna element being electrically connected with a feeding portion located in the grounding conductor, wherein said ceiling conductor includes a removed portion on the side of opened another end of said rectangular waveguide, whereby an electromagnetic wave of a radio signal fed to the feeding portion is radiated from the removed portion of said ceiling conductor and opened another end of said rectangular waveguide.