TC 9-64 _________________________________________________________________________
The insertion of an inductor or capacitor in series with
an antenna to lengthen or shorten the antenna
magnetic (H) field
The field produced when current flows through a
The lobe in which the greatest amount of radiation
A quarter-wave antenna oriented perpendicular to the
earth and operated with one end grounded.
of day and a given angle of incidence.
The substance through which a wave travels from one
point to the next. Air, water, and wood are examples of
The range of the radio frequency spectrum extending
from 300 kHz to 3 MHz.
The lobe in which the radiation intensity is less than a
An array consisting of one or more arrays and classified
An array that contains two or more parasitic elements
and a driven element.
The multiple paths a radio wave may follow between
The line-of-sight horizon.
The portion of a sine wave below the reference line.
The fixed minimum points of voltage or current on a
noise (of sound)
An unwanted disturbance caused by spurious waves
that originate from man-made or natural sources.