Cross-Polarization Cancellation in an Offset Parabolic Reflector Antenna Using a Corrugated Matched Feed

Cross-Polarization Cancellation in an Offset Parabolic Reflector Antenna Using a Corrugated Matched Feed

This letter presents the design of a dual-mode corrugated matched feed to cancel the unwanted high cross polarization and beam squinting in an offset parabolic reflector antenna. The matched feed concept has been implemented in a cylindrical corrugated structure by adding a higher order HE 21 mode t...

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Veröffentlicht in:IEEE antennas and wireless propagation letters 2009, Vol.8, p.861-864
Hauptverfasser: Sharma, S.B., Pujara, D., Chakrabarty, S.B., Dey, R.
Format: Artikel
Sprache:eng
Schlagworte:
Antenna feeds
Antenna radiation patterns
Antennas
Apertures
Cancellation
Corrugated horn
Corrugating
Cross polarization
Geometry
Horn antennas
Horns
Lenses
matched feed
offset reflector antenna
Offsets
Parabolic reflectors
Polarization
Reflector antennas
Satellite antennas
Space technology
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Beschreibung
Zusammenfassung:This letter presents the design of a dual-mode corrugated matched feed to cancel the unwanted high cross polarization and beam squinting in an offset parabolic reflector antenna. The matched feed concept has been implemented in a cylindrical corrugated structure by adding a higher order HE 21 mode to the fundamental HE 11 mode. The designed feed was then used to illuminate a linearly, as well as a circularly, polarized offset parabolic reflector antenna, and the secondary radiation patterns were computed. Significant improvement in the cross polarization was observed when the results were compared to that of a conventional corrugated horn illuminated offset reflector antenna.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2009.2027913