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antenna meaning

[ æn'tenə ] Pronunciation:   "antenna" in a sentence
  • Noun: antenna (antennae,antennas)  an'tenu
    1. An electrical device that sends or receives radio or television signals
      - aerial, transmitting aerial 
    2. Sensitivity similar to that of a receptor organ
      "he had a special antenna for public relations"
      - feeler 
    3. One of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste
      - feeler

    Derived forms: antennas, antennae

    See also: antennary

    Type of: electrical device, sensitiveness, sensitivity, tentacle

    Part of: receiver, receiving system, sender, transmitter

    Encyclopedia: Antenna


  • [Electronics]
    In a communications system, a specialized transducer that converts incoming electromagnetic fields into alternating electric currents having the same frequencies (receiving antenna), or converts an alternating current at a specific frequency into an outgoing electromagnetic field at the same frequency (transmitting antenna). An antenna can be a simple wire or rod, or a complicated structure. Thousands of geometries and specifications are possible. The optimum antenna type for a given situation depends on the communications frequency, the distance to be covered, and various other factors.

Examples

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  1. they erected a television antenna on the roof ..
  2. they erected a television antenna on the roof ..
  3. these waves struck the antenna of a receiving station.
  4. power is being delivered along the wires which lead into the antenna.
  5. radio astronomy today is armed with the largest antennas in the world.

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