The interest in the deployment of imaging technologies at airports, check points or other security relevant areas lead to the development of different active and passive imaging systems in the millimeter-wave (mmW) range. This was also encouraged by the enormous advances made in semiconductor technology over the last few years, offering high integration densities with moderate costs.

This presentation deals with the design and technological aspects of a fully electronic multistatic imaging system (R&S QPS: Quick Personnel Security) developed for close range applications in the frequency range 70 GHz to 80 GHz. After reviewing the sparse array design, the resulting imaging properties and technological aspects advanced approaches like multipath imaging are presented. Finally the application of mmW imaging for nondestructive evaluation and quality assurance is discussed.