Linked from

The 74 pages that link to Radar, each with the reason it gives.

• Electromagnetic radiationRelated: Radar uses returned electromagnetic waves to estimate an object's range and motion.

• EcholocationCompared with: Radar shares active reflection-based ranging but uses electromagnetic waves instead of sound.

• Battle of the AtlanticRelated: Shipborne and airborne radar helped Allied forces locate submarines, including at night.

• LiDARCompared with: Radar also measures by signal return, but uses radio waves rather than laser light.

• Vacuum tubeRelated: Specialized tubes generated and amplified the high-frequency power needed by early radar.

• Air traffic controlRelated: Surveillance radar lets controllers track aircraft positions and movement.

• KinematicsRelated: Repeated range and Doppler measurements reveal an object's motion.

• SonarCompared with: Radar also uses returned waves for ranging, but seawater strongly limits radio transmission.

• Signal detection theoryRelated: Wartime radar operators faced the practical problem of separating weak echoes from noise.

• Radio frequencyBroader topic: Radar uses RF echoes to estimate an object's range, speed, or direction.

• Radio propagationRelated: Radar range and detection depend on signal propagation to a target and back.

• Signal processingRelated: Signal processing extracts target range, velocity, and direction from returning echoes.

• AzimuthRelated: Radar systems report a target's direction using azimuth alongside range and elevation.

• Synthetic aperture radarNarrower topic: SAR is an imaging form of radar that exploits echoes rather than visible light.

• William ShockleyRelated: During World War II, Shockley worked on radar-related research and military operations analysis.

• Military aviationRelated: Airborne radar helps crews detect, track, and identify targets beyond visual range.

• Radio transmitterRelated: Radar transmitters send pulses or waveforms whose returning echoes reveal targets.

• ReflectionRelated: Radar infers targets from waves reflected back toward the transmitter.

• Fighter aircraftRelated: Airborne radar helps fighters find, track, and target aircraft at a distance.

• Vannevar BushRelated: Bush’s wartime research organizations coordinated major radar development programs.

• Radio waveRelated: The delay and direction of echoes reveal an object's distance and position.

• Stealth technologyNarrower topic: Radar is the principal sensing technology that aircraft shaping was designed to defeat.

• Active protection systemRelated: Radar can detect and track an approaching projectile before it reaches the vehicle.

• Air defenseRelated: Radar commonly detects and tracks airborne threats before visual contact.

• Cruise missileRelated: Low flight can limit radar line of sight and shorten the time available for detection.

• Radar cross-sectionNarrower topic: RCS describes one target property that governs the strength of radar returns.

• MicrowaveRelated: Many radar systems use microwave frequencies for directional beams and useful target resolution.

• Air-to-air missileRelated: Radar supplies target information and, for some guidance modes, illuminates the target.

• Manchester BabyRelated: Williams’s wartime radar research led to the storage techniques adapted for the Baby.

• Gulf of Tonkin incidentRelated: Erratic radar contacts contributed to the mistaken impression that attackers were approaching the destroyers.

• Laser rangefinderCompared with: Radar ranges with radio-frequency echoes, which behave differently from optical returns.

• Voltage-controlled oscillatorRelated: VCOs generate swept-frequency signals used in frequency-modulated continuous-wave radar.

• Anti-aircraft warfareNarrower topic: Air-defense radar applies this sensing technology to airborne targets.

• AvionicsRelated: Aircraft use radar for weather detection, surveillance, and obstacle awareness.

• Electronic countermeasureNarrower topic: Radar is a principal sensing system that electronic countermeasures seek to disrupt or evade.

• Multirole combat aircraftRelated: Airborne radar can support both target interception and the detection of ground targets.

• Proximity fuzeRelated: Radar principles provide a way to sense nearby targets.

• Stealth aircraftNarrower topic: Stealth aircraft emerged in response to the military use of radar detection.

• AcronymBroader topic: Its acronym origin is no longer apparent to many speakers.

• AltimeterNarrower topic: Radio altimeters use radar ranging to determine distance below the aircraft.

• Interceptor aircraftRelated: Radar often provides the first detection that sends an interceptor toward a target.

• Battle of Cape EsperanceRelated: U.S. radar detected the approaching Japanese ships before visual contact.

• BearingRelated: Radar reports target direction as an angular bearing from the sensor.

• Military aircraftRelated: Airborne radar helps crews detect, track, and sometimes target objects at a distance.

• Spectral analysisRelated: Doppler spectra reveal motion and distinguish targets from clutter.

• Charles H. TownesRelated: Townes’s wartime radar work sharpened his interest in short-wavelength microwave sources.

• Edward Mills PurcellRelated: Radar engineering trained Purcell’s group to generate and detect the radiofrequency signals used in resonance experiments.

• Mark OliphantNarrower topic: Oliphant’s wartime work advanced microwave radar equipment and its practical deployment.

• Radian per secondRelated: Doppler and rotating-antenna calculations can use angular rates in radians per second.

• Radio-frequency engineeringRelated: Radar depends on RF transmitters, receivers, antennas, and frequency-control circuits.