Slot array antenna

A slot array antenna, comprising:

• a radiation plate having:
• a first surface that has a plurality of slots configured to radiate radio waves in a radiating direction,
• second and third surfaces attached to the first surface and that form a horn shape,
• wherein the second surface is in a plane that forms a non-zero acute angle above the radiating direction, and the third surface is in a plane that forms the non-zero acute angle below the radiating direction, and
• first and second connecting members extending away from the first surface of the radiation plate in a direction opposite to the radiating direction, the first and second connecting members of the radiation plate being flat quadrilaterals located at respective ends of the first surface of the radiation plate, the first and second connecting members of the radiation plate being located on respective planes that are perpendicular to a central axis of a waveguide;
• and
• a base plate having:
• first, second, and third surfaces that form a U-shape, with the first and third surfaces of the base plate being parallel to each other, and
• first and second notches at positions inset a first predetermined distance from respective ends of each of the first and third surfaces of the base plate,
• wherein a distance between the first and second notches of the base plate is equal to a distance between the first and second connecting members of the radiation plate,
• wherein the first and second connecting members of the radiation plate are removably insertable into respective ones of the first and second notches in the direction opposite to the radiating direction of the radio waves,
• wherein the first, second, and third surfaces of the base plate and the first surface of the radiation plate form the waveguide, and
• wherein the first and second connecting members of the radiation plate are configured to act as a short for the radio waves radiating out from the slots.