Millimeterwave radar for SAR on UAVs with real-time image display

Modern synthetic aperture radar (SAR) systems giving very high resolution have to be light and small in size to fit in small aircrafts. In this paper we show a newly designed SAR system operating at 94 GHz using a high flexible frequency generation module. This very new concept ensures a very linear signal generation which was formerly known from arbitrary waveform generators. The bandwidth of the system allows measurements up to 3.8 GHz bandwidth. We have flown this SAR-system using a model aircraft as well as a microlight and show real-time processed SAR-images. In addition we tested different kinds of inertial measurement units (IMU) to determine the minimum requirements for optimal SAR measurements.