Abstract:The antenna scanning techniques of Milli-Meter Wave(MMW) and terahertz(THz) wave have attracted much attention in electromagnetic field. Photo-Induced Plasma Grating(PIPG) scanning antenna as a low cost and rapid scanning technology provides a new approach and idea for MMW and THz wave beam steering. In this paper, the recent progresses of the photo-induced plasma grating scanning antenna are reviewed, which covers the working principle, structure, efficiency as well as the pattern. The study significance and main challenges are also discussed and prospected. It is a hope that this review will give a guide for the research and applications of the photo-induced plasma grating antenna.