radar

(noun)

A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of sent radio waves (usually microwaves) reflected from their surfaces.

Related Terms

Examples of radar in the following topics:

  • Microwaves

    • This frequency range is used for most radar transmitters, microwave ovens, wireless LANs, cell phones, satellite communication, microwave radio relay links, and numerous short range terrestrial data links.
    • Radar, first developed in World War II, is a common application of microwaves.
    • By detecting and timing microwave echoes, radar systems can determine the distance to objects as diverse as clouds and aircraft.
    • A Doppler shift in the radar echo can determine the speed of a car or the intensity of a rainstorm.
    • Sophisticated radar systems can map the Earth and other planets, with a resolution limited by wavelength.

  • Antennae

    • These include: radio broadcasting, broadcast television, two-way radio, communications receivers, radar, cell phones, and satellite communications; as well as other devices such as garage door openers, wireless microphones, bluetooth enabled devices, wireless computer networks, baby monitors, and RFID tags on merchandise.

  • The Production of Electromagnetic Waves

    • ., light) and used in modern technology—AM and FM radio, cordless and cellular phones, garage door openers, wireless networks, radar, microwave ovens, etc.

  • Turbulence Explained

    • Another method of detecting this type of turbulence is ultrasound, used as a medical indicator in a process analogous to Doppler-shift radar (used to detect storms).

  • The Nuclear Arms Race

    • Both superpowers built large radar arrays to detect incoming bombers and missiles.

  • Examples and Applications

    • The magnetron has practical applications in radar, heating (as the primary component of a microwave oven), and lighting.

  • Radio Waves

    • Artificially generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, communications satellites, computer networks and innumerable other applications.

  • Power

    • Even the most cogent and valuable statement may slip under a business reader's radar the first time it appears.

  • The Battle of the Atlantic

    • By spring 1943, the British had also developed an effective sea-scanning radar small enough to be carried in patrol aircraft armed with airborne depth charges.

  • Conclusion: WWII and the U.S.

    • Additionally, radar had been developed during the war.