| AS-2813/SRC |
|
| Physical
Dimensions |
Antenna |
| Height |
203
- 13/16 inches |
| Width |
116
- 3/4 inches |
| Depth |
7
inches |
| Weight |
6
lbs |
|
Coupler |
| Height |
8
- 11/16 inches |
| Width |
59
inches |
| Depth |
3
- 1/2 inches |
| Weight |
20
lbs |
| Operating
Temperature |
-54
C to +65 C |
|
|
| Frequency
Range |
30
to 70 MHz |
| Input
Impedance |
50
ohms |
| VSWR |
VSWR
antenna not greater than 2.5:1 over frequency range.
Coupler: Not greater than 1.2:1 at sum port with
matched 50 ohm loads at output ports. |
| Polarization |
Linear-vertical
or horizontal |
| RF Power
Rating |
Antenna:
100 watts; Coupler: 150 watts (average), 600 watts
peak |
| Power
Requirement |
None |
| Feed
Type |
Unbalanced,
coaxial cable |
| Input
Connector |
Antenna:
Type N; Coupler: 7/8 inch EIA flange |
|
|
Description:
The AS-2813/SRC Antenna Assembly is an omnidirectional ship
board transmitting and/or receiving system. It consists of
two AS-2814/SRC unidirectional log periodic arrays pointed
in opposite directions and inter connected through equal
length 50 ohm coaxial cables to a Type CU-2061/SRC Antenna
Coupler. The transmitting and/or receiving equipment is
connected to the input port of the CU-2061/SRC, which is a
combiner/divider. In transmit mode it divides a single 50
ohm input to two 50 ohm outputs to feed two antennas. In the
receive mode it will combine the inputs from two antennas to
a single 50 ohm output. This system may be used with VHF
transmitting and/or receiving equipment designed to operate
within the frequency range and RF power handling limitations
of the coupler and antennas.
Installation: To provide omnidirectional
coverage the antennas are installed on opposite sides of the
ship. The location of the coupler must be selected to
provide equal coaxial cable lengths to the antennas. The
antenna is supplied with a mounting pad for installa tion.
The pad is 6 - 1/2 inches square and has twelve 13/32 inch
holes equally spaced centered 1/2 inch from its periphery.
The coupler has two 17/32 inch bolt holes at each end for
mounting. A minimum of six inches clearance must be allowed
between the coupler and supporting structure. If the coupler
is installed in an area where it is subject to mechanical
damage it must be provided with a protective cover.
Considerations: The locations for the antennas
should be selected to provide maximum omnidirectional
coverage within the physical constraints of the ship's
structure. |
