Antenna array

An antenna array comprising:

• two frames which form an array of waveguides, each of the frames including:
• a plate portion including an array of grooves laid out next to one another, with each of the grooves having an open end and a closed end;
• and
• a frame portion arranged adjacent to the plate portion at the closed end side of the grooves, with the frame portion having an opening that opens in a direction perpendicular to both of a direction in which the grooves extend and a direction in which the grooves are laid out;
• a dielectric substrate held between the two frames by the plate portion and the frame portion of each of the frames, with the dielectric substrate including an array of feeders and electronic circuits, each electronic circuit having a discrete active element, and the array of electronic circuits being exposed from the opening of at least either one of the frames;
• wherein the frames are superimposed with the dielectric substrate so that the array of grooves forms the array of waveguides, with each of the electronic circuits being electromagnetically connected to a corresponding one of the waveguides.