Helical antenna

Helical antenna

A helical antenna is an antenna consisting of one or more conducting wires wound in the form of a helix. A helical antenna made of one helical wire, the most common type, is called monofilar, while antennas with two or four wires in a helix are called bifilar, or quadrifilar, respectively. In most cases, directional helical antennas are mounted over a ground plane, while omnidirectional designs may not be. The feed line is connected between the bottom of the helix and the ground plane. Helical antennas can operate in one of two principal modes — normal mode or axial mode.
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Spiral antenna
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Helical_antenna
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Helical antenna

A helical antenna is an antenna consisting of one or more conducting wires wound in the form of a helix. A helical antenna made of one helical wire, the most common type, is called monofilar, while antennas with two or four wires in a helix are called bifilar, or quadrifilar, respectively. In most cases, directional helical antennas are mounted over a ground plane, while omnidirectional designs may not be. The feed line is connected between the bottom of the helix and the ground plane. Helical antennas can operate in one of two principal modes — normal mode or axial mode.
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A helical antenna is an antenn ...... red by physicist John D. Kraus
@en
Antena śrubowa (helikalna) jes ...... ynczego zwoju, – długość fali.
@pl
L'antenne hélice axiale doit s ...... utilisées que des VHF aux SHF.
@fr
La antena helicoidal o antena ...... omar la forma de un solenoide.
@es
Спира́льная антенна — диапазон ...... передачи на высоких частотах.
@ru
ヘリカルアンテナは、無線通信用アンテナの一種である。短波から ...... っ掛けたりぶつけたりしても折れない）ため、使用に便利である。
@ja
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A helical antenna is an antenn ...... s — normal mode or axial mode.
@en
Antena śrubowa (helikalna) jes ...... wynosi w przybliżeniu: gdzie:
@pl
L'antenne hélice axiale doit s ...... e aussi d'antenne hélicoïdale.
@fr
La antena helicoidal o antena ...... omar la forma de un solenoide.
@es
Спира́льная антенна — диапазон ...... передачи на высоких частотах.
@ru
ヘリカルアンテナは、無線通信用アンテナの一種である。短波から ...... る周波数帯域が広い（中心周波数の10％程度と言われている）。
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Antena helicoidal
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Antena śrubowa
@pl
Antenne hélice axiale
@fr
Helical antenna
@en
Wendelantenne
@de
Спиральная антенна
@ru
ヘリカルアンテナ
@ja
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