Radar device and transmitting/receiving array antenna

A radar apparatus, comprising:

• a first radar circuit to which a first array antenna is connected;
• and
• a second radar circuit to which a second array antenna is connected, wherein
• the first array antenna and the second array antenna are arranged on a two-dimensional plane formed by a first axis and a second axis,
• the second array antenna includes a plurality of second antenna lines,
• each of the plurality of second antenna lines includes a plurality of second antennas,
• adjacent second antennas of the plurality of second antennas are spaced at a first interval in the first axis direction and a second interval in the second axis direction,
• all of the plurality of second antennas included in the second array antenna have different positions in the first direction,
• the first array antenna includes two first antenna lines arranged at different positions in the second direction,
• each of the two first antenna lines includes a plurality of first antennas,
• the plurality of first antennas included in one of the two first antenna lines is arranged at a same position in the second axis direction and at a third interval in the first axis direction, and
• the plurality of first antennas included in an other of the two first antenna lines is arranged at positions separated from each of the plurality of first antennas positioned at an end of the one of the two first antenna lines by an integer multiple of the first interval in the first direction, and are arranged at positions in the first direction different from the plurality of first antennas included in the one of the two first antenna lines.