China's gallium oxide crystal could make stealth jet radar compact

Researchers at Beijing University have identified a new crystal form of gallium oxide (kappa-gallium oxide) with promising ferroelectric properties that could revolutionize semiconductor technology for radar systems. Unlike current radar semiconductors based on gallium arsenide (GaAs) or gallium nitride (GaN), this material combines high-temperature stability with nonvolatile data storage capabilities. This integration could enable the development of highly compact, energy-efficient, and multifunctional radar electronics—potentially marking a “third generation” of active electronically scanned array (AESA) radar technology. Such advancements would improve radar power output, detection range, and signal processing speed while reducing failure points and power consumption. Although the research remains experimental and is not yet deployed in military systems, the discovery of kappa-gallium oxide’s stable ferroelectricity under extreme conditions suggests significant potential for future high-power device integration. This material could consolidate multiple radar functions—signal transmission, data storage, and processing—into a single