Editing Low-probability-of-intercept radar (section)

{{Short description|Radar technology that hides its activity from a detected target}}
{{More footnotes|date=June 2017}}
A '''low-probability-of-intercept radar''' ('''LPIR''') is a [[radar]] employing measures to avoid detection by passive radar detection equipment (such as a [[radar warning receiver]] (RWR), or [[electronic support]] receiver) while it is [[passive radar#Target detection|searching for a target]] or engaged in [[passive radar#Line tracking|target tracking]]. This characteristic is desirable in a [[radar]] because it allows finding and tracking an opponent without alerting them to the radar's presence. This also protects the radar installation from [[anti-radiation missile]]s (ARMs).

LPI measures include:
*Power management and high [[duty cycle]], meaning the transmitter is on most of the time (long integration times)
*Wide bandwidth (or [[Ultra-wideband]])
*[[Frequency agility]], and frequency selection
*Advanced/irregular scan patterns
*Coded pulses (coherent detection)
*High processing gain
*Low [[sidelobe]] antennas