A radar includes a transmitter antenna unit that includes multiple transmitter antennas arranged at first horizontal distances and first vertical distances from each other, a receiver antenna unit that includes multiple receiver antennas arranged at second horizontal distances and second vertical distances from each other, a transceiver that transmits transmission signals through the transmitter antenna unit and receives return signals reflected from a target object trough the receiver antenna unit, and a processing unit that derives information about the target object by processing the received return signals.