Direct detection MM-wave linear antenna array on the base of hemispherical lens antenna elements coupled with narrow-gap hot-carrier bolometers

Un-cooled low-cost mm-wave/THz detectors with sufficient sensitivity are required as sensitive elements in focal plane antenna arrays for applications in real time active or passive imaging. Still up to now in spite of progress in field effect transistors (FETs) at zero bias source-drain condition and zero bias Schottky barrier diodes (SBDs) for un-cooled direct detection realization, all arrays for vision systems known have not yet demonstrated needful results and proper functioning. In our recent paper [2] un-cooled narrow-gap mercury-cadmium-telluride (MCT) semiconductor thin layers grown on GaAs substrates that are hybridized with antennas on low permittivity dielectric substrates were considered as mm-wave direct detection elements which can be scalable into larger arrays for low-cost real-time active imaging systems. In sum, the simulations of linear arrays for spectral region from 50 to 500 GHz with silicon or quartz microlenses with MCT bolometers and bow-tie antennas were considered.