| AS-2877/SRC |
|
| Physical
Dimensions |
|
| Height |
120
inches |
| Diameter |
13
- 1/2 inches |
| Weight |
64
lbs |
| Operating
Temperature |
-54
C to +65 C |
|
|
| Frequency
Range |
225
to 400 MHz |
| Input
Impedance |
50
ohms |
| VSWR |
>
1.8:1 over freq range |
| Polarization |
Vertical |
| RF
Power Rating |
1
kilowatt PEP |
| Power
Requirement |
None |
| Feed
Type |
Unbalanced,
coaxial cable |
| Input
Connector |
1)
UHF Antennas, Type HN
2) ECM Antenna,
Waveguide |
|
|
Description:
The AS-2877/SRC is a dual frequency omnidirectional UHF
Antenna. The radiating elements are cylindrical dipoles
arranged around a center support. A waveguide runs from the
base plate through the center to the top of the antenna
housing. The antennas and supports are enclosed in a
fiberglass radome. The dipoles are configured to give a
minimum separation of 25 dB between channels. The waveguide
provides facilities to install an ECM antenna, such as the
AS-1175/SLR, on top of the radome. The AS-2877/SRC may be
used with any UHF transmitting and/or receiving equipment
capable of operating within its frequency range and RF power
handling capabilities.
Installation: The antenna assembly mounting
flange has eight 11/16 inch diameter bolt holes equally
spaced on an 11 - 3/4 inch bolt circle for use in mounting
the antenna. The antenna may be installed on a suitable
mounting plate having matching bolt holes. The mounting
plate must have a center hole to accommodate the antenna
transmission lines and waveguide.
Considerations: The location for the
AS-2877/SRC should be selected to provide maximum
omnidirectional coverage within the physical constraints of
the ship's structure. UHF propagation in the frequency range
of the antenna is generally line-of-sight; therefore,
antennas that are masked by surrounding structures produce
limited coverage in azimuth and/or elevation. |
