A radar device comprising: n radar signal processors, each of which includes i transmission channels and j reception channels, configured to transmit radar signals through the i transmission channels, receive the radar signals reflected from a target object through the j reception channels, and process the received radar signals, thereby calculating a range to the target object and Doppler data for each of the j reception channels; n*i physical transmitting antennas connected to the i transmission channels of each of the n radar signal processors and configured to transmit the radar signals; n*j physical receiving antennas connected to the j reception channels of each of the n radar signal processors and configured to receive the radar signals reflected from the target object; and a controller configured to control operations of the n radar signal processors and generate a virtual antenna array having a two-dimensional beam distribution by driving the n*i transmitting antennas and the n*j receiving antennas with reference to antenna configuration related information; where n, i, j are integer numbers larger than one, respectively; wherein the antenna configuration related information defines stationary array information on the n*i transmitting antennas and the n*j receiving antennas, driving sequence information on the n*i transmitting antennas and the n*j receiving antennas, and 2D beam distribution information on the dynamic virtual antenna array according to a driving sequence of the n*i transmitting antennas and the n*j receiving antennas; and characterized in that the n*i transmitting antennas are arrayed in a form of a first curved line and the n*j receiving antennas are arrayed in a form of a second curved line such that the first curved line and the second curved line intersect with each other, thereby having a widely distributed surveillance region. n radar signal processors, each of which includes i transmission channels and j reception channels, configured to transmit radar signals through the i transmission channels, receive the radar signals reflected from a target object through the j reception channels, and process the received radar signals, thereby calculating a range to the target object and Doppler data for each of the j reception channels; n*i physical transmitting antennas connected to the i transmission channels of each of the n radar signal processors and configured to transmit the radar signals; n*j physical receiving antennas connected to the j reception channels of each of the n radar signal processors and configured to receive the radar signals reflected from the target object; and a controller configured to control operations of the n radar signal processors and generate a virtual antenna array having a two-dimensional beam distribution by driving the n*i transmitting antennas and the n*j receiving antennas with reference to antenna configuration related information; where n, i, j are integer numbers larger than one, respectively; wherein the antenna configuration related information defines stationary array information on the n*i transmitting antennas and the n*j receiving antennas, driving sequence information on the n*i transmitting antennas and the n*j receiving antennas, and 2D beam distribution information on the dynamic virtual antenna array according to a driving sequence of the n*i transmitting antennas and the n*j receiving antennas; and characterized in that the n*i transmitting antennas are arrayed in a form of a first curved line and the n*j receiving antennas are arrayed in a form of a second curved line such that the first curved line and the second curved line intersect with each other, thereby having a widely distributed surveillance region.