Output details

Detection of handguns by their complex natural resonant frequencies

The decomposition of the late time response from metallic objects illuminated with broadband microwave radiation is utilised here for the effective and autonomous detection and discrimination of handguns and non-threatening items, such as mobile phone handsets, cameras, keys and pens. This technique presents a novel and promising method of reliably and automatically picking out on-body metallic threat items and is potentially suitable as an autonomous screening technology. Current technologies for mass screening of people rely on human interpretation of millimetre wave images, a slow and unpredictable process.