Digital beamforming is an advanced signal processing methodology applied to antenna arrays, involving the digitization and computational manipulation of signals from each array element to synthesize directional beams. As a research concept, it investigates techniques for highly flexible spatial filtering and signal separation in the digital domain, characterized by per-element or sub-array digital conversion and computational weighting. Its significance lies in enabling enhanced spectral efficiency, interference mitigation, and multi-beam capabilities critical for modern wireless communication systems, radar, and sensing applications.