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Whip antenna - Definition and Overview |
| Related Words: Barb, Barbel, Dish, Doublet, Feeler, Mast, Palp, Reflector, Scanner, Tower, Vibrissa |
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A whip antenna is an antenna with a single driven element and a ground plane. These antennas are very common, especially for mobile applications and hand held radios. These antennas are usually attached to a vehicle and designed to be flexible, so that they don't break when struck. These antennas derive their name from the whip-like motion they exibit during transit.
A whip antenna is a stiff, yet flexible, wire (almost always) mounted vertically, and attached at one end to a ground plane. The whip antenna can also be called a half-dipole antenna, and as such, has a toroidal radiation pattern where the axis of the toroid centers about the whip. The length of the whip determines its wavelength, although it may be shortened with a loading coil anywhere along the antenna. Whips are generally a fraction of their actual operating wavelength, half-wave, and quarter-wave whips are very common.
Being vertically mounted causes the whip antenna to have vertical polarization. Whips are thought of as omni-directional, because they radiate equally in all directions when viewed from above, however whips are less receptive to signals directly above them.
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Example Usage of antenna |
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antenna: az ok hogy én lusta disznó vagyok és most küldtem a szakdogám a konzulensnek... de hogy ő lustább mint én az biztos! :) |
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nickimckay: Tried fixing my antenna booster...the shock iIreceived is a reminder that I am not an electrician and should not try to be. |
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ragstweeting: MUTED: issues with voice on #LTE
http://bit.ly/6e4qBD
Phones'll have 2G, 3G, 4G, GSM, BTooth, GPS, wifi antenna. Voice shud be there on #LTE |
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