| AT-948/U |
|
| Physical
Dimensions |
|
| Height |
48
- 1/2 inches |
| Diameter |
5
- 3/4 inches |
| Weight |
25
lbs |
| Operating
Temperature |
Unavailable |
| Wind |
Unavailable |
|
|
| Frequency
Range |
400
to 550 MHz
|
| Input
Impedance |
50
ohms |
| VSWR |
>
1.6:1 |
| Polarization |
Vertical |
| RF
Power Rating |
2
kilowatts (average) |
| Gain |
4.5
to 6 dBi |
| Feed
Type |
Unavailable |
| Input
Connector |
Type
LC |
|
|
Description:
The AT-948/U is a rugged, lightweight dipole array which
provides vertically polarized, omnidirectional coverage for
medium power, general purpose use in the 400-550 MHz
frequency band.
The antenna is a
two-element colinear array enclosed and sealed within an
epoxy fiberglass radome for prolonged, trouble-free use
under severe environmental conditions. It is untuned and
operates over its entire frequency range with a VSWR, on 50
ohms of less than 1.6: 1, at average power levels to 2 kW.
The radiating elements
are fed in parallel to provide a half-power vertical
beamwidth of 250 to 350 and a peak gain of 41/2 to 6 dBi. A
moderate upward beam tilt is incorporated to reduce the
effects of ground reflections. Currents on the upper
radiator are interrupted to provide effective pattern
fill-in of the overhead cone of silence.
Mounting is by means of
an integral base flange. A coaxial, type LC input connector
and a radome purging plug are recessed into the base.
|
