Non-Imaging Microwave and Millimetre-Wave Sensors for Concealed Object Detection

Technology now allows the use of microwave and millimetre wave sensors for the detection of concealed objects—typically weapons and explosive devices—on the human body. The book discusses these developments and includes examples of actual devices built and tested by the authors. The book focuses on active millimetre wave sensors using the direct detection and the heterodyne approach, active microwave sensors for CNR-based object detection, passive millimetre wave sensors, and the role of shielding effects in operating non-imaging MM-wave sensors.