A prototype handheld device by Cambridge Consultants provides a 3D image of objects embedded within walls or floors. Using short range radar technology, an operator can look inside an opaque object or surface from one side using a handheld device. It can be used to form an image of structures such as pipes and cables below structures, as well as detecting items of interest such as concealed explosives and contraband. Unlike existing transmission x-ray systems, the radar-based system does not require access to both sides of the object in order to scan inside, and provides an easily interpreted image of the wall structure, which compact radar systems have previously not provided. This can enable quicker deployment compared to cumbersome backscatter x-rays which can be expensive and power-hungry. Conventional radar systems can be difficult to interpret. The prototype is the equivalent size of a standard sheet of letter paper and 15cm deep, weighing approximately 3.5kg with batteries. The multi-channel system enables synthetic aperture processing, and uses short pulses of energy with high bandwidth to enable the short range, high resolution imaging required.
