Patent ID: 7538642

Claim:
A waveguide coupler for connecting between waveguide terminals arranged in a rectangular shape and respectively formed in a glass epoxy substrate and a ceramic substrate arranged opposite to each other, wherein each of said substrates includes a contact region which conducts electricity to a grounded conductor of said waveguide terminal, one said contact region being arranged to surround said waveguide terminals at a position opposite to the other said contact region when said waveguide terminals are connected together, said substrates are joined together with a plurality of electrically conductive joint members arranged in an array shaped like a rectangle surrounding said waveguide terminal between said opposing contact regions, and said waveguide terminal of said ceramic substrate is formed by through holes arranged in a rectangular shape facing said waveguide terminal of said ceramic substrate inside the array of said plurality of electrically conductive joint members, wherein said waveguide terminal of said glass epoxy substrate is formed by providing a rectangular hole.