The article is about radar. But they did mentioned that the elements can be configured for different radome shape and sizes, meaning this radar is not designed specifically for one plane.
Actually it's a feasibility study rather than testing out a specific radar type I think.
The Nanjing Research Institute of Electronics Technology [NRIET] employs 5,500 persons. Construction of production facilities began around 1960, and as of early 1963 the plant and assembly yard covered about 43 acres. Typical applications include airborne radar transmitters, high resolution radar systems, combinations of C3I system and surface to surface tactical missile systems. Research topics include anti-jamming capabilities of surveillance, search and target designation radars, as well as airborne radar imaging of ship targets using SAR/ISAR methods to image a ship target by processing data of airborne radar.