Radar system with transmit signal cancellation between transmit and receive phased array antennas

A radar system comprising:

• a transmit phased array antenna;
• a receive phased array antenna;
• and
• at least one processing device coupled to the transmit and receive phased array antennas, wherein the at least one processing device is configured:
• to perform an iterative calibration process in which transmit signals are transmitted via respective different selected subsets of antenna elements of a transmit phased array antenna of a radar system and corresponding amounts of transmit signal energy are monitored in a receive phased array antenna of the radar system to determine impacts of the different selected subsets of antenna elements of the transmit phased array antenna on isolation between the transmit and receive phased array antennas;
• to identify a particular one of the different selected subsets of the antenna elements of the transmit phased array antenna based at least in part on their relative impacts on the isolation between the transmit and receive phased array antennas;
• and
• to utilize the particular identified subset of the antenna elements of the transmit phased array antenna for isolation-enhancing transmit signal cancellation during operation of the radar system.

A computer program product comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs of a radar system, the radar system comprising a transmit phased array antenna and a receive phased array antenna, wherein the program code, when executed by at least one processing device of the radar system, causes the radar system:

• to perform an iterative calibration process in which transmit signals are transmitted via respective different selected subsets of antenna elements of a transmit phased array antenna of a radar system and corresponding amounts of transmit signal energy are monitored in a receive phased array antenna of the radar system to determine impacts of the different selected subsets of antenna elements of the transmit phased array antenna on isolation between the transmit and receive phased array antennas;
• to identify a particular one of the different selected subsets of the antenna elements of the transmit phased array antenna based at least in part on their relative impacts on the isolation between the transmit and receive phased array antennas;
• and
• to utilize the particular identified subset of the antenna elements of the transmit phased array antenna for isolation-enhancing transmit signal cancellation during operation of the radar system.