FEEDS FOR DUAL-REFLECTOR ANTENNA SYSTEMS

"RING" CASSEGRAIN FEED SYSTEMS


Model 9622-800 uses two interlaced sets of six-element helix arrays. One set operates from 950 - 1050 MHz and the other from 1535 - 1645 MHz. Both are right-hand circular polarized. It mounts to Scientific-Atlanta Series 8224 C-band Cassegrain feed in a 7M SCTS Reflector.

Model 9534-850 uses a single eight-element helix array. It operates in the 2.0 GHz band with right-hand circular polarization. Mounting provisions interface with a 6.25 inch diameter corrugated X-band Cassegrain feed. The ring array can be fed from a monopulse comparator if required. The combination of the S-band ring feed and X-band Cassegrain feed in a 5 meter shaped reflector yields a highly efficient antenna for S/X-band earth imagery applications with S-band autotracking.

Model 8518-800-3 is identical to Model 9622-800 except it mates to a Scientific-Atlanta Servo 8225 C-band feed and is used on an 11M reflector. Model 9819-800 mounts in a TIW 10.5M reflector.

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Model 9622-800
L-Band Ring Feed
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Model 9534-850
2.0 GHz Helix Array (shown with and without radome cover)

FEEDHORNS (CASSEGRAIN AND GREGORIAN)

 

SPECIFICATIONS
Model
Number		 Edge
Angle		 Frequency
GHz		 Polarization Aperture
Diameter		 Length
Inches		 Features
8832-800
18°
3.10 - 4.50
Dual Circular
22.50
40.8
 2.5 inch diameter waveguide
ESC-46C
20°
3.70 - 4.20
Dual Linear
13.00
67.5
 Low-cost diagonal horn
9723-810
25°
7.25 - 8.40
Dual Circular
6.20
21.0
 Gregorian, offset reflector
9236-800
18°
8.00 - 16.0
Remote Linear
8.00
19.8
 Octave-bandwidth
9723-820
25°
10.95 - 14.5
Dual Linear
4.40
10.0
 Gregorian, offset reflector
NOTE: All feeds are corrugated conical horns unless noted.
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Model ESC-46C C-band Diagonal Horn
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Model 9236-800
8 - 16 GHz Corrugated Conical Horn
 

DUAL-BAND CASSEGRAIN DESIGNS



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Model 8854-800 C/Ku-band
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Model 9747-800 C/Ku-band
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Model 9210-800 C/X-band