| AS-2867/SRR |
|
| Physical
Dimensions |
|
| Height |
67
- 7/32 inches |
| Diameter
(antenna) |
20
inches |
| Diameter
(w/ ground plane) |
96
inches |
| Diameter
(w/ radials) |
157
- 1/2 inches |
| Weight |
Antenna:
50 lbs; w/ ground radials: 65 lbs |
| Operating
Temperature |
-54
C to +65 C |
|
|
| Frequency
Range |
30
to 150 MHz and 150 to 1000 MHz |
| Input
Impedance |
50
ohms |
| VSWR |
VSWR
30 to 33 MHz not greater than 8:1; 33 to 1000 MHz
not greater than 4:1 |
| Polarization |
Vertical |
| RF
Power Rating |
n/a;
receive only |
| Power
Requirement |
None |
| Feed
Type |
Unbalanced,
coaxial cable |
| Input
Connector |
Type
N, female (2 each) |
|
|
Description:
The AS-2867/SRR is a VHF/UHF broadband omnidirectional
receiving antenna. It is a dual frequency range antenna. The
lower range uses the entire structure as a broadband
monopole and the upper range uses a discone radiator. The
two coaxial transmission line connectors are located in the
base of the antenna. A metal ground plane at least eight
feet in diameter or a set of four ground radials each 96 -
1/4 inches long is required. The antenna may be used with
any receiving equipment designed to operate within its
frequency range.
Installation: The antenna mounting flange has
eight 7/16 inch bolt holes equally spaced on a 9 - 7/8 inch
diameter bolt circle. The antenna may be mounted to
bulkheads, stacks, masts or on an antenna pedestal. A ground
plane made of expanded metal is required for installations
where the antenna is attached to the ship's structure. A
minimum distance of 48 inches is required between the
vertical center-line of the antenna and the ship's structure
in the same plane. The ground radials may be used wherever
the antenna is mounted on a pedestal and there is sufficient
space to accommodate the radials. The antenna foundation
must have a hole to accommodate the coaxial transmission
lines.
Considerations: The location of the AS-2867/SRR
should be selected to furnish maximum coverage within the
physical constraints of the ships structure. Propagation in
the frequency range of this antenna is generally
line-of-sight and antennas that are masked by surrounding
structures may produce limited coverage in azimuth and/or
elevation. |
