transmission line and its load.
intensity (of sound)
The measurement of the amplitude of sound energy.
Sometimes mistakenly called loudness.
The point where two lines drawn on a graph cross each
Any disturbance that produces an undesirable response
or degrades a wave.
The most important region of the atmosphere extending
from 31 miles to 250 miles above the earth. Contains
four cloud-like layers that affect radio waves.
Disturbances in the earth's magnetic field that make
The radiation of energy equally in all directions.
The small amount of current that flows between the
conductors of a transmission line through the dielectric.
Straight lines that represent light waves emitting from
See OUTPUT END.
An area of a radiation pattern plotted on a polar-
coordinate graph that represents maximum radiation.
Waves in which the disturbance (back and forth motion)
takes place in the direction of propagation. Sometimes
called compression waves.
The curves of a standing wave or antenna that
represent amplitude of current or voltage.
low frequency (LF)
The range of the radio frequency spectrum extending
from 30 kHz to 300 kHz.
The minimum operating frequency that can be used for