Passive subsystem antenna array design for TeraSCREEN security screening system

The FP7 project TeraSCREEN is focused on the development of a multi-frequency multi-mode Terahertz (THz) detection prototype for security screening. In this paper the passive subsystem antenna array is presented which consists of standard gain horn antennas, a waveguide manifold in order to reduce the antenna separation and improve the array resolution and compact waveguide twists required to change the polarization between the mixers and the antenna manifold.