Patent ID: 7190243

Claim:
A waveguide coupler for connecting between waveguide terminals arranged in a rectangular shape and 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 terminal at a position opposite to the other said contact region when both 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 inside the array of said electrically conductive joint members, wherein said glass epoxy substrate is attached to a metallic member having a waveguide terminal to be connected to the waveguide terminal of said glass epoxy substrate on a surface opposite to an opposing surface of said glass epoxy substrate facing said ceramic substrate.