Millimeter-Wave Computational Interferometric Imaging using a Chaotic Cavity

Abstract

Radiometric imaging is a passive technique that measures the radiation emitted by a hot object and finds applications in many fields. In particular, the detection of buried threats requires the joint optimization of the spatial resolution, field of view and acquisition time of imaging systems that impose strong constraints on the redundancy of active systems. In this paper, it is proposed to explore the implementation of a computational interferometric imaging solution in the millimeter band, making it possible to limit the number of signals to be measured by a multiplexing operation carried out passively and in the physical layer with the use of electrically large cavities. This approach is studied within the framework of a numerical study then of a proof of experimental concept in the W band.