Slot array antenna, and radar, radar system, and wireless communication system including the slot array antenna

A slot array antenna comprising:

• a first electrically conductive member including a first electrically conductive surface and a plurality of slots therein, the plurality of slots being arrayed in a first direction which extends along the first electrically conductive surface and in a second direction which intersects the first direction;
• a second electrically conductive member including a second electrically conductive surface which opposes the first electrically conductive surface;
• a plurality of waveguide members arrayed between the first and second electrically conductive members along a third direction which intersects the first direction, each waveguide member including an electrically conductive waveguide face which extends along the first direction so as to oppose at least two slots among the plurality of slots, the waveguide face having a uniform stripe shape extending across positions opposing the at least two slots, the waveguide face extending entirely through the at least two slots when viewed from a fourth direction which is normal to the waveguide face;
• and
• an artificial magnetic conductor in a subregion which is within a region between the first and second electrically conductive members, but which is outside of a subregion containing the plurality of waveguide members, wherein
• the artificial magnetic conductor comprises a plurality of electrically conductive rods arrayed on the second electrically conductive member;
• no electric wall exists in a space between two adjacent waveguide faces of two adjacent waveguide members among the plurality of waveguide members;
• and
• one row of electrically conductive rods is provided between the two adjacent waveguide members.