Counterpoise

• English: In electronics and radio communication a counterpoise is a network of suspended horizontal wires or cables (or a metal screen), used as a substitute for an earth (ground) connection in a radio antenna system, cf. w:en:Counterpoise (ground system)
• Deutsch: Ein Gegengewicht (englisch Counterpoise) ist in der Funktechnik eine elektrisch leitende Fläche, die insbesondere bei unsymmetrisch angeregten Antennen benötigt wird, um eine gute Anpassung (geringes VSWR) und effiziente Abstrahlung zu erzielen siehe auch w:de:Gegengewicht (Funktechnik)

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  "Flattop" capacitive top load with counterpoise beneath
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  A counterpoise, a network of wires suspended above the ground under a transmitting radio antenna
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  Base of antenna mast of AM radio station showing a counterpoise ground
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  Upper section is the antenna while the bottom serves as a counterpoise.
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  Attached to a second parallel wire below the first, which functions as a counterpoise, an artificial "ground".
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  Under the antenna there is an elaborate ground system called a counterpoise consisting of radial cables in a star shape suspended a few feet above
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  Photograph of radio station 8XK (antenna with counterpoise)
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  There is a counterpoise under the antenna consisting of a fan-shaped network of wires suspended
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  A counterpoise antenna, half on each plane, was used withthis transmitter
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  counterpoise which serves as a ground for the above antenna
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  The car's body was used as a counterpoise
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  Uses of the Counterpoise
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  The otherend of the spiral is already connected to the counterpoise throughthe antenna ammeter
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  Antenna uses a buddipole coil on top, with a long stainless whip. The counterpoise/mast is PVC pipe with a wire wrapped around
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  Vertical Monopole Radiation Using a Counterpoise or Buried Radials