Sub-terahertz wave radiating array consisting of nine photomixers for illuminating smoky environment

A sub-terahertz (THz) wave radiating array consisting of nine antenna-integrated uni-traveling carrier photodiode modules was developed. When the radiated sub-THz waves were incoherent, all modules illuminated uniformly in the same area, and the illumination power increased linearly by increasing the number of modules in operation. These illumination characteristics indicate that the range of active imaging in a smoky environment can be extended up to 1 meter or more by using the array.