A Brief Review on Terahertz Avalanche Transit Time Sources

During last few years, numerous researches have been processed for the growth of reliable sources in the terahertz (THz) frequency regime. Among different solid-state sources, impact ionization avalanche transit time (IMPATT) diode is the most promising one for THz wave generation. Here, a selective review has been carried on THz IMPATT diode, which helps in detailed understanding of device operation in this domain. The paper mainly deals with several terahertz properties based on DC, noise, small and large-signal simulation of IMPATT devices. This study reveals the potency of this device in many THz applications.