Signal Diverse Array Radar for Electronic Warfare

The conventional phased array cannot effectively suppress the interferences that have the same direction angle but different ranges of the targets. To overcome this disadvantage, frequency diverse array (FDA) is proposed in recent years. However, FDA beampattern is time-variant, which makes targets illuminated only in a very short duration and causes poor detectability of targets. This letter presents a novel signal diverse array (SDA) radar, which provides greater degrees of freedom for space-time-frequency-phase control, permitting novel beampattern for special applications, through controlling more aspects of the transmit signals of each antenna element, including amplitude, frequency, and initial phase. Simulation results show the effectiveness and outperformance of the proposed SDA radar.