Narrow band wide angle scanning circular frequency diverse array radar

One dimensional Linear Frequency Diverse Array (FDA) is extended to a circular two dimensional FDA array (CFDA). The CFDA operates as a pulsed FDA in the transmission (TX) mode while it operates as a pulsed phased array (PA) in the receiving (RX) mode. CFDA has a constant antenna pattern steering property in the plane of the circle while it has FDA scanning property in the orthogonal plane. This is achieved by assigning frequency offsets to the elements of the array cosinusoidally which changes with the steer angle, making the CFDA narrow band. The matched filter (MF) for pulse compression is also designed for a particular direction of interest.