only control their side lobes, they also use very thin, fast-moving beams of energy in complicated search patterns. This technique may be enough to confuse the RWR so it does not recognize the radar as a threat, even if the signal itself is detected. In addition to stealth considerations, reducing side and back lobes is desirable as it makes the radar more difficult to characterise. This can increase the difficulty in determining which type it is (concealing information about the carrying platform) and make it much harder to jam. Systems that feature LPIR include modern active electronically scanned array (AESA) radars such as that on the F/A-18E/F Super Hornet and the passive electronically scanned array (PESA) radar on the S-300PMU-2 surface-to-air missile system. List of LPI radars See also Echolocation jamming Electronic warfare Electronic countermeasure Electronic warfare support measures Active electronically scanned array Notes References Pace, P.E. (2009). "Detecting and Classifying Low Probability of Intercept Radar", "Artech House" F-22 Avionics / GlobalSecurity.org Low Probability of Intercept Radar (LPIR) / GlobalSecurity.org Aerial warfare tactics Radar Radio frequency propagation Radio frequency antenna types Antennas (radio)