HRL Laboratories has developed a coded aperture subreflector array (CASA) that can identify individuals concealing weapons and explosives at long ranges.
CASA can be deployed for several uses, including security scanning and guiding robots or vehicles. It is designed as a high-resolution, low-power radar antenna array.
The technology can be used in short ranges making it suitable for security screening.
It also operates in low visibility conditions, such as smoke and dust. This gives the radar the ability to navigate helicopters safely through dust or darkness along with its imaging capability.
The radar’s digitally synthesised beam can be used to create high-resolution 3D images.
Images are created by processing the data collected by the beam’s reflection off targets without moving the CASA.
HRL principal investigator on the project Jonathan Lynch said: “With this programme, Defense Advanced Research Project Agency’s (DARPA) goal was high-resolution radar imaging of the quality of a synthetic aperture radar (SAR), but in a smaller, stationary system.”
The CASA has been developed by HRL researchers under the DARPA’s advanced scanning technology for imaging radars (ASTIR) programme.