Microwave IC waveguide device module

A microwave IC waveguide device module comprising:

• a substrate having a throughhole, the substrate having a first face and a second face which is opposite from the first face;
• a microwave IC provided on or above the first face of the substrate;
• a waveguide member provided below the second face of the substrate, the waveguide member having an electrically conductive waveguide face which opposes the throughhole, the waveguide face having a stripe shape extending in a manner of following along the substrate;
• an electrically conductive member covering at least a portion of the second face that extends in a manner of following along the waveguide face;
• and
• an artificial magnetic conductor extending on both sides of the waveguide member, wherein,
• the microwave IC includes a terminal pair, the terminal pair comprising a signal terminal and a ground terminal;
• the substrate includes an inner-wall electrically conductive portion covering an inner wall of the throughhole and being electrically connected with the electrically conductive member;
• and
• the signal terminal and the ground terminal are electrically connected respectively with two portions of the inner-wall electrically conductive portion opposing each other with the throughhole interposed therebetween.