#aerial__antenna__transmitting_aerial  an electrical device that sends or receives radio or television signals
  supertype:  electrical_device  a device that produces or is powered by electricity
  part of:  receiver  transmitter
  subtype:  dipole_antenna__dipole  an aerial half a wavelength long consisting of two rods connected to a transmission line at the center
  subtype:  directional_antenna__directionalantenna  an antenna that transmits or receives signals only in a narrow angle
     subtype:  array.directional_antenna  an arrangement of aerials spaced to give desired directional characteristics
     subtype:  dish_antenna__dish__dish_aerial__saucer  directional antenna consisting of a parabolic reflector for microwave or radio frequency radiation
        subtype:  scanner  a radar dish that rotates or oscillates in order to scan a broad area
     subtype:  yagi__Yagi_aerial  a sharply directional antenna
  subtype:  omnidirectional_antenna__omnidirectionalantenna__nondirectional_antenna  an antenna that sends or receives signals equally in all directions
     subtype:  radio_antenna__radioantenna__radio_aerial__radioaerial  omnidirectional antenna comprising the part of a radio receiver by means of which radio signals are received
     subtype:  television_antenna__tv-antenna  an omnidirectional antenna tuned to the broadcast frequencies assigned to television
        subtype:  rabbit_ears  an indoor tv antenna; 2 extendible rods forming a V

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