...stores and libraries to aid item location and prevent theft. The team will use its research into controlling electromagneticradiation in the UHF (ultra high frequency) band, to eliminate interference, improve accuracy and deliver performance...
http://www.securitypark.co.uk/security_article263954.html
...or spectral band - A range of wavelengths of electromagneticradiation. Remote sensing devices commonly collect images...The physical property indicating how much electromagneticradiation is being reflected or radiated by a chosen point...
http://faridesm.xm.com/Glossary.pdf