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Compact dual-band axially corrugated profiled horn for prime-focus reflector antenna

Published online by Cambridge University Press:  12 May 2011

Ramesh Chandra Gupta ,
Jigar Pandya ,
Khagindra K. Sood  and
Rajeev Jyoti
Ramesh Chandra Gupta*
Affiliation:
Satellite Communication Antenna Division, Antenna Systems Group, Space Applications Centre, Indian Space Research Organisation, Jodhpur Tekra, Ahmedabad, Gujarat 380015, India
Jigar Pandya
Affiliation:
Satellite Communication Antenna Division, Antenna Systems Group, Space Applications Centre, Indian Space Research Organisation, Jodhpur Tekra, Ahmedabad, Gujarat 380015, India
Khagindra K. Sood
Affiliation:
Satellite Communication Antenna Division, Antenna Systems Group, Space Applications Centre, Indian Space Research Organisation, Jodhpur Tekra, Ahmedabad, Gujarat 380015, India
Rajeev Jyoti
Affiliation:
Antenna Systems Group, Space Applications Centre, Indian Space Research Organisation, Jodhpur Tekra, Ahmedabad, Gujarat 380015, India
*
Corresponding author: R. C. Gupta Email: rameshgupta@sac.isro.gov.in
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Abstract

This paper reports a new compact dual-band axially corrugated profiled horn feed (DBCPH) for prime-focus reflector antenna at C-band (uplink and downlink frequency bands with bandwidth ratio of 1.6). DBPCH consists of one sinusoid profiled section and two internal axial corrugations (internal short-circuited ring slots), for obtaining a multimode horn feed. Such a blended structure is optimized over the specified frequency bands (3.68–3.70 and 5.865–5.915 GHz) to achieve various performance objectives (such as compactness, return loss, polarization purity, etc.). Measured and predicted results show that DBCPH provides better return loss >18.6 dB, low cross-polarization (better than −32 dB), and adequate edge taper at ±48° (8.5–11.7 dB) along with compact size (1.3λ aperture diameter and 0.88λ length at lower frequency). The horn would be used as a feed element for front-fed prime-focus reflector for pencil beam spacecraft antenna application.

Keywords

Dual-band antennaAxially corrugated profiled hornPrime-focus reflector antennaSpacecraft antenna
Type
Industrial and Engineering Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 3 , Issue 4 , August 2011 , pp. 493 - 496
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2011

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References

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