Antenna array, artifical target system, method and computer program

A method, comprising:

• causing electrically shorting at least one of multiple antennas of an antenna array and connecting at least one other of said multiple antennas to a load at a first time instant, wherein said multiple antennas are ultra wideband antennas and each of said multiple antennas is coupled to a separate switch, each switch being arranged to control one of said multiple antennas such that when said one antenna is connected to a load, said one antenna acts as an absorber, and when said one antenna is electrically shorted, said one antenna acts as a reflector, wherein each switch is arranged to enable use in various applications;
• and
• causing connecting the at least one of multiple antennas of the antenna array to a load and electrically shorting the at least one other of said multiple antennas at a second time instant, wherein the antenna array is arranged to provide a first radar response operating on a first frequency at the first time instant and a second radar response operating on a second frequency at the second time instant, the first radar response and the second radar response being different, and the first frequency and second frequency being different.

A computer program product, embodied on a non-transitory computer readable medium, configured to control a processing unit to perform:

• causing electrically shorting at least one of multiple antennas of an antenna array and connecting at least one other of said multiple antennas to a load at a first time instant, wherein said multiple antennas are ultra wideband antennas and each of said multiple antennas is coupled to a separate switch, each switch being arranged to control one of said multiple antennas such that when said one antenna is connected to a load, said one antenna acts as an absorber, and when said one antenna is electrically shorted, said one antenna acts as a reflector, wherein each switch is arranged to enable use in various applications;
• and
• causing connecting the at least one of multiple antennas of the antenna array to a load and electrically shorting the at least one other of said multiple antennas at a second time instant, wherein the antenna array is arranged to provide a first radar response operating on a first frequency at the first time instant and a second radar response operating on a second frequency at the second time instant, the first radar response and the second radar response being different, and the first frequency and second frequency being different.