Barrett PRC-4090 - Page 188

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BARRETT PRC-4090 TACTICAL HF SDR TRANSCEIVER - INSTALLATION
Tactical Tuned Wire Dipole Antenna (2090-02-01)
The Tactical Tuned Dipole Antenna is a tuned
antenna with frequency labels to indicate
tuned lengths. For operation, each side of
the antenna is unwound to the tuned length
for the frequency required. For operation at
a labelled frequency, the label should be level
with the end of the winder as shown in the
picture below. Lengths for intermediate fre-
quencies should be estimated and tied off
appropriately. The remaining wire remains on
the winder. The throwing cord can then be
used to elevate the antenna. The antenna will
handle 100 W continuous data and CW trans-
mission. The antenna can be used in a number
of congurations, depending on structures
available for elevation.
13 Mhz
6 Mhz
8 Mhz
9 Mhz
Tactical Tuned Wire Dipole Antenna Congurations
Horizontal Dipole
The horizontal dipole has maximum gain on the broadsides of the antenna,
and reduced gain along the axis. Height above ground affects radiation angle.
Lower heights give higher angle radiation, better for NVIS (short distance).
Higher heights give lower radiation angle, better for long distance communi-
cation.
20Mhz
11Mhz
18Mhz
20Mhz
11Mhz
18Mhz