Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
ITEM NAME: ANTENNA GROUP
TYPE: AN/SPA-45B
Transit Time for rf Energy Between First and Last
RELATION TO SIMILAR EQUIPMENT
Slots: 0.166 usec
None.
Gain: 33.5 db relative to an isotropic radiator at
3050.6 mc
TECHNICAL DESCRIPTION
Beamwidth in Elevation: 3 deg
Beamwidth in Azimuth: 2.4 deg
Side Lobes in Elevation: -20 db with respect to the
Normal: 15 rpm
main beam.
With MTI: 11.5 rpm
Side Lobes in Azimuth: -16 db for the first pair; -20
For Testing: 30 rpm
db for all others.
For Coincident Video: 4.8 rpm
Ambient Temperature: -55 deg to plus 150 deg C (-
Antenna
67 deg to plus 302 deg F).
Reflector: Parabolic cylinder section tilted 25 deg
from the vertical.
INSTALLATION CONSIDERATIONS
Primary Feed: Folded rectangular waveguide.
Not available.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
SHIPPING DATA
COMPONENT
BOXES
OVERALL DIMENSIONS
UNIT WT.
(NR.)
(Inches)
(Pounds)
Antenna AS-999A/SPS
1
95 x 124 x 152
3000
1
55 x 60 x 60
1600
EQUIPMENT SUPPLIED DATA
COMPONENTS
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
Antenna Group AN/SPA-45B includes:
1
92 x 110 x 184
2475
Antenna AS-999A/SPS
1
92 x 110 x 141
1
43 x 54 x 54
Assembly, Rotary Coupler & Waveguide
1
Segments Hughes Part No. 517623
Elbow-Lower Rotating Joint Hughes
1
Part No. 517996
Tube, Waveguide Antenna Feed
1
Hughes Part No. 585278
Connector and Cable Hughes Part No.
585610
REFERENCE DATA AND LITERATURE
Technical Manuals:
NAVSHIPS 93390
AN/SPA-45B: 2