On RF localisation deception capability of FDA signal under interferometry reconnaissance

Phased-array antennas are known for their capability to electronically steer a beam with high effectiveness, but beam steering is fixed in an angle for all range cells. Different from that, frequency diverse array (FDA) offers a range-angle-dependent beam-pattern. The use of a small frequency increment across its array elements to generate an array factor that is a function of the angle, time, and range, allowing the FDA antenna to form focusing beampattern to the desired range and angle region. Aiming to resolve the problem that traditional phased-array radars can be easy detected and localised by undesired reconnaissance receiver, the use of FDA instead of phased-array provides potential radio frequency (RF) stealth capability. Here, the authors analyse the RF localisation deception performance under interferometry reconnaissance for undesired receivers, which RF stealth capability is validated by the numerical results.