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S-Pol center fed antenna. Dual Offset-Feed Gregorian Antenna System. Operational March 2008. -38 cross-pol; -40 db in practice. First sidelobe is 31 db down. Gain. First side lobe is 25 db down. 31 db down for new antenna. Cross-pole about -35 db. - PowerPoint PPT Presentation
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S-Pol center fedantenna
Dual Offset-Feed Gregorian Dual Offset-Feed Gregorian Antenna SystemAntenna System
Operational March 2008
33
-38 cross-pol;-40 db in practice.
First sidelobe is31 db down.
Gain
Pattern for the “old” CHILL center fed parabolic antennaFrom Bringi and Chandrasekar (2001)
The 1994 CHILL center fed parabolic antennaFrom Bringi and Chandrasekar (2001)
First side lobe is25 db down. 31 dbdown for newantenna.
Cross-pole about-35 db.
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