C-UAS
Counter-unmanned aircraft systems. Equipment and methods used to detect, track and defeat drones.
EW
Electronic warfare. Military use of the electromagnetic spectrum to sense, protect, or deny its use to an adversary.
EP / EA
Electronic protection and electronic attack. EP protects your own use of the spectrum; EA denies or degrades an adversary's.
J/S ratio
Jamming-to-signal ratio. The power of the jamming signal at a receiver relative to the wanted signal. Denial requires the jammer to win this ratio.
ISM band
Industrial, scientific and medical radio bands, such as 2.4 GHz and 5.8 GHz, used by most commercial drones for control and video.
GNSS
Global navigation satellite systems, such as GPS. Drones use GNSS signals, including around 1.6 GHz, for positioning.
FPV
First-person view. A drone flown through a live video feed from an onboard camera.
Soft defeat
Stopping a drone without destroying it, for example by forcing it to return, hover or land.
EMCON
Emission control. Limiting your own transmissions so they do not reveal your position.
Spot jamming
Concentrating jamming power on a single frequency.
Barrage jamming
Jamming a wide band of frequencies at once, spreading power across it.
Sweep jamming
Moving a narrow jamming signal rapidly across a band.
Frequency hopping
Rapidly switching a link between frequencies in a pattern known to transmitter and receiver, to resist interception and jamming.
IP55
Ingress protection rating: protected against dust ingress that would harm operation, and against low-pressure water jets from any direction.
MIL-STD
United States military standards, widely used to specify and qualify equipment for environmental and electrical performance.
Monopole
An antenna made of a single conductor over a ground plane, radiating evenly in all horizontal directions.
VSWR
Voltage standing wave ratio. A measure of how well an antenna and cable are matched; a lower value means less power reflected back.
Threat library
The set of signal signatures a system uses to recognise hostile links. Buraq's library updates itself without new hardware.