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, wherein adjacent second antennas of the plurality of second antennas are spaced apart at a first interval in the first axis direction and at a second interval in the second axis direction,
• the first array antenna includes three or more first antenna lines,
• each of the three or more first antenna lines includes a plurality of first antennas,
• the plurality of first antennas are individually arranged at a same position in the second axis direction and at different positions in the first axis direction, and
• of the three or more first antenna lines, two first antenna lines arranged continuously in the second axis direction include at least one all of the first antennas arranged at different positions in the first axis direction.