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"F",
"G",
"H",
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"J",
"K",
"L",
"M",
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WATER LINE: A reference line used for vertical measurements. When used with an aircraft it is usually the ground with the landing gear extended normally. One of several aircraft location designations, also see butt line and fuselage station.
WAVEGUIDE: A transmission line consisting of a hollow conducting tube of arbitrary geometry (usually rectangular, but may be circular) within which electromagnetic waves may propagate. A hollow metal tube used as a transmission line to guide energy from one point to another. [WaveGuide Manufacturers]
WAVELENGTH: The distance traveled by a wave in one period (the period is the time required to complete one cycle). Wavelength = c/f. In the atmosphere, electromagnetic waves travel at c, the speed of light (300 million meters per second
or 30 cm/nsec). At 5 GHz, one wavelength = 6 cm. At 10 GHz, one wavelength = 3 cm. The distance between points of
corresponding phase of two consecutive cycles of a wave.
WAVEMETER: An instrument for measuring the frequency of a radio wave. The wavemeter is a mechanically tunable resonant circuit. It must be part of a reflection of transmission measurement system to measure the maximum response of a signal. Below 20 GHz, the wavemeter has been replaced by the frequency counter with much greater accuracy and ease of use.
Whip antenna: A vertical monopole, another type of antenna. [Antenna Manufacturers], [Antenna Dictionary].
Wire: Conductors in one of many different sizes with different kinds of insulation. The American Wire Gauge defines the different sizes of copper wire. [Wire and Cable Manufacturers]
