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A whip antenna is the most common example of a monopole antenna, an antenna with a single
driven element and a ground plane.
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The whip antenna is a stiff but flexible wire mounted, usually vertically, with one end
adjacent to a ground plane. The whip antenna can also be called a half-dipole antenna.
These
antennas are widely used for mobile applications and hand-held radios. They are
usually attached to a vehicle and designed to be flexible, so that they don't break when
struck.
The capacitance is related by a formula and is a function of the percentage of wavelength.
The matching inductor is chosen such that the antenna resonates at the desired frequency.
When the antenna is perfectly tuned then it looks like a pure resistance tied to ground.
This resistance is known as the radiation resistance.
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