| AS-2231/SRA-60(V) |
|
| Physical
Dimensions |
|
| Height |
156
inches |
| Diameter |
48
inches |
| Weight |
409
lbs |
| Operating
Temperature |
-54
C to +65 C |
|
|
| Frequency
Range |
30
to 76 MHz |
| Input
Impedance |
50
ohms (nominal) |
| VSWR |
>
3:1 over freq range |
| Polarization |
Vertical |
| RF
Power Rating |
400
watts (average); 1600 watts PEP |
| Power
Requirement |
None |
| Feed
Type |
Unbalanced,
coaxial cable |
| Input
Connector |
Type
N |
|
|
Description:
The AS-2231/SRA-60(V) antenna is a broadband omnidirectional
biconical dipole. It is a component of the AN/SRA-60(V)
Antenna Coupler Group. The antenna consists of a center
support post and two cylindrical cage type radiating
elements. A teflon insulator for isolating the two sections
of the dipole is located on top of the support column. The
antenna transmission line is connected to the upper
radiating element at the insulator. The vertical members of
the upper and lower cones are connected by a fiberglass
insulator for mechanical rigidity and vibration damping. The
AN/SRA-60(V) coupler group is supplied in either a four or
eight channel configuration. The eight channel configuration
requires the installation of two AS-2231/SRA-60(V) antennas.
Installation: The base flange of the antenna
center support post has eight 1-1/32 inch bolt holes located
on a 14 inch bolt circle for installing the antenna onboard
ship. The antenna is designed for vertical mounting on a
deck, deck house top or a pedestal of any desired height.
The transmission line insulation should be stripped from the
outer conductor to allow bonding to the antenna cable clamps
located on the antenna support column. Where the
transmission line meets the deck the outer conductor must be
grounded directly to the deck.
Considerations: The location onboard ship for
the AS-2231/ SRA-60(V) should be selected to provide maximum
omnidirectional coverage within the physical constraints of
the ship's structure. If it is necessary to locate the
antenna near large structures a minimum separation of 35
feet should be maintained in order to reduce the effects of
the structure on antenna impedance. Propagation within the
frequency range of the antenna is generally line-of-sight,
therefore, antennas that are masked by surrounding
structures may produce limited coverage in azimuth and/or
elevation. |
