antenna meaning

• 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.
  

• t-antenna:    [Electronics]See T ...
• active antenna:    [Electronics]An an ...
• adcock antenna:    [Electronics]A dir ...

Examples

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.