It is well known that millimetre waves can pass through clothing. In short range applications such as in the scanning of people for security purposes, operating at W band can be an advantage. The size of the equipment is decreased when compared to operation at Ka band and the equipments have similar performance.
In this paper a W band mechanically scanned imager designed for imaging weapons and contraband hidden under clothing is discussed. This imager is based on a modified folded conical scan technology previously reported. In this design an additional optical element is added to give a Cassegrain configuration in image space. This increases the effective focal length and enables improved sampling of the image and provides more space for the receivers. This imager is constructed from low cost materials such as polystyrene, polythene and printed circuit board materials. The trade off between image spatial resolution and thermal sensitivity is discussed.
|Title of host publication||Passive Millimeter-Wave Imaging Technology IX|
|Editors||R Appleby, DA Wikner|
|Place of Publication||BELLINGHAM|
|Number of pages||7|
|Publication status||Published - 2006|
|Event||Conference on Passive Millimeter-Wave Imaging Technology IX - Kissimmee, United States|
Duration: 19 Apr 2006 → …
|Conference||Conference on Passive Millimeter-Wave Imaging Technology IX|
|Period||19/04/2006 → …|
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics