TeraSCREEN is an EU FP7 Security project aimed at developing a combined active, with frequency channel centered at 360 GHz, and passive, with frequency channels centered at 94, 220 and 360 GHz, imaging system for border controls in airport and commercial ferry ports. The system will include automatic threat detection and classification and has been designed with a strong focus on the ethical, legal and practical aspects of operating in these environments and with the potential threats in mind. Furthermore, both the passive and active systems are based on array receivers with the active system consisting of a 16 element MIMO FMCW radar centered at 360 GHz with a bandwidth of 30 GHz utilizing a custom made direct digital synthesizer. The 16 element passive receiver system at 360 GHz uses commercial Gunn diode oscillators at 90 GHz followed by custom made 90 to 180 GHz frequency doublers supplying the local oscillator for 360 GHz sub-harmonic mixers. This paper describes the development of the passive antenna module, local oscillator chain, frequency mixers and detectors used in the passive receiver array of this system. The complete passive receiver chain is characterized in this paper.
A Thz spectral characterization of the behaviour of different explosives is presented in this paper. This characterization
will be done in the frequency range from 20 GHz to 4 THz using a Teraview Spectra 3000. This system has a capacity of
measuring from 20 GHz to 4 THz fed by a laser source. With the Teraview Spectra 3000 equipment will be possible to
calculate the refractive index, the absorbance and other important parameters of the explosive samples. With this study it
will be possible to characterize some of the most common used explosives, i.e., gun explosive, gunpowder mine, pent,
TNT, RDX, etc, and it will allow to determine their electromagnetic peculiarities in order to design a future imaging
system that allow detecting them in security and defense sectors.
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