Ubiquitous MIMO multifunction digital array radar

Radar equipment specifications are often driven by the need to detect small targets in clutter. Relevant specifications include dynamic range, phase noise, system stability, isolation and spurs. Furthermore, the desire for low probability of intercept radar operation also influences the radar hardware design. This paper describes how digital array radars can be used to manage radar time and energy, thereby simplifying radar equipment design. Digital arrays enable both highly focused transmit beams (e.g., for track) and broad transmit illumination (e.g., for search). Regarding the latter, multi-input multi-output (MIMO) techniques, which allow wide angular coverage, are described.