15. When properly installed, the long-wire antenna AT-984A/G is--
a.
one-quarter wavelength long.
b.
one-half wavelength long.
c.
150 feet long.
d.
75 feet long.
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ANSWERS:
1.
c.
2.
c.
3.
b.
4.
c.
5.
d.
6.
b.
7.
c.
8.
c.
9.
d.
10.
a.
11.
a.
12.
d.
13.
b.
14.
d.
15.
c.
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22. SUMMARY.
This lesson has considered the fundamentals of antenna
theory (radiation, polarization, and wave propagation).
By understanding
these basic theories, you will be better able to site your antennas and gain
optimum use of your radios.
As units become more mobile and battlefield
frontages expand, the field artilleryman will depend more and more upon
radio communications to coordinate fire support activities and to bring
steel onto the target.
Additionally, this lesson has discussed the installation, use, and operation
of three antenna systems (AT-984A/G, OE-254, and RC-292) available to the
field artillery to extend the range of the low- and medium-power FM radios
authorized by current tables of organization and equipment.
The antenna AT-984A/G is a long-wire, end-fed, directional antenna available
to forward observers and others who require directional, point-to-point
Antenna equipment RC-292 is an elevated, wide-band, modified ground-plane
antenna designed to increase the range of FM tactical radio sets by 50 to
200 percent. RC-292 is especially useful because it is omnidirectional (all
direction transmitting and receiving).
The OE-254 antenna group will
eventually replace RC-292 in the Army inventory.
All these antennas are portable and easily installed by one or two persons
in a short period of time.
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