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A polarization sensitive millimeter-wave sensor operating at 77 GHz is built and characterized. The sensor is scalable to a distributed aperture architecture and results are presented from using multiple antennas. Imagery is also presented from a 30-element distributed aperture system that is only sensitive to one polarization.
Diffractive optical elements (polypropylene kinoform diffractive lenses, silicon binary diffractive lenses, and silicon beamsplitters) for the terahertz spectral range have been designed and characterized using high-power terahertz radiation of Novosibirsk free electron laser. The effect of an antireflection coating on the silicon elements was studied.
In this contribution we compare two different techniques to perform a range refocusing from 12.5 m to 37.5 m in a Terahertz Imaging Radar. The first technique, already verified experimentally, consists on the mechanical translation of the transceiver, whereas the second technique consists on the deformation of a membrane mirror with the potential to achieve larger refocusing speeds.
A novel passive THz imaging system of single channel and optical-mechanical scanning is described. It employs a Cassegrain antenna of 390mm in diameter, and achieves the two-dimensional scanning imaging via the cooperation of a line scanning mirror, driven by a crank-rocker mechanism in a high speed, and the motion of the frame scanning mirror. Thus, the system has many advantages such as low cost,...
The Compact Advanced Terahertz Source (CATS) developed at ENEA during the past years has now been moved to a new bunker and upgraded for new application capabilities.
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