Harris RF-7800W Student Manual page 85

• LOS (Line of Sight) — A term that refers to radio signal propagation in a straight line from the transmitter to a receiver
without refraction; generally extends to the visible horizon.
• MAIN LOBE — In an antenna radiation pattern, the lobe containing the direction of maximum radiation intensity.
• OMNIDIRECTIONAL ANTENNA — An antenna whose pattern is non-directional in azimuth.
• POLARIZATION — The orientation of a wave relative to a reference plane. Usually expressed as horizontal or vertical in
radio wave terminology.
• PROPAGATION — The movement of radio frequency energy through the atmosphere.
• RADIATION PATTERN — The pattern is determined by an antenna's design and strongly influenced by its location with
respect to the ground. Radiation patterns are frequency dependent.
• SKY WAVE — A radio wave that is reflected by the ionosphere.
• SURFACE WAVES — Travel along the surface of the earth and may reach beyond the horizon.
• TCP (Transmission Control Protocol) — One of the core protocols of the Internet protocol suite. Using TCP, programs on
networked computers can create connections to one another, over which they can send data.
• TRANSCEIVER — Equipment using common circuits in order to provide transmitting and receiving capability.
• VERTICAL WHIP ANTENNA — An Omni-directional antenna that has low take-off angles and vertical polarity.
• WAVELENGTH — The distance between the top of one wave and the identical phase of the succeeding one in the
advance of waves of radiant energy.
Glossary (2)
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