TC 9-64 _________________________________________________________________________
plane of polarization
The plane (vertical or horizontal) with respect to the
earth in which the E field propagates.
point of zero
See REFERENCE LINE.
displacement
polar-coordinate
A graph whose axes consist of a series of circles with a
graph
common center and a rotating radius extending from
the center of the concentric circles.
positive alternation
The portion of a sine wave above the reference line.
power loss
The heat loss in a conductor as current flows through it.
power standing-
The ratio of the square of the maximum and minimum
wave ratio (PSWR)
voltages of a transmission line.
primary colors (of
The three primary colors of light (red, green, and blue),
light)
from which all other colors may be derived.
prism
A triangular-shaped glass that refracts and disperses
light waves into component wavelengths.
propagation
Waves traveling through a medium.
quality (of sound)
The factor that distinguishes tones of pitch and
loudness.
quarter-wave
Same as the Marconi antenna.
antenna
radiation field
The electromagnetic field that detaches itself from an
antenna and travels through space.
radiation losses
The losses that occur when magnetic lines of force about
a conductor are projected into space as radiation and
are not returned to the conductor as the cycle
alternates.
radiation pattern
A plot of the radiated energy from an antenna.
The resistance, which if inserted in place of an antenna,
would consume the same amount of power as that
radiated by the antenna.
radio frequencies
Electromagnetic frequencies that fall between 3
(RF)
kilohertz and 300 gigahertz and are used for radio
Glossary-10
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