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X-band compact dual circularly polarized isoflux antenna for nanosatellite applications

Published online by Cambridge University Press:  09 January 2017

Eric Arnaud*
Affiliation:
XLIM – CNRS, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France. Phone: +33(0)555426047
Cyrille Menudier
Affiliation:
XLIM – CNRS, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France. Phone: +33(0)555426047
Jamil Fouany
Affiliation:
XLIM – CNRS, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France. Phone: +33(0)555426047
Thierry Monediere
Affiliation:
XLIM – CNRS, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France. Phone: +33(0)555426047
Marc Thevenot
Affiliation:
XLIM – CNRS, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France. Phone: +33(0)555426047
*
Corresponding author: E. Arnaud Email: [email protected]

Abstract

This paper presents an original solution to design a compact dual circularly polarized isoflux antenna for nanosatellite applications. This kind of antenna has been previously designed in our laboratory, for a single circular polarization. This antenna is composed of a dual circularly polarized feed and a choke horn antenna. This feed is a cross-shaped slot in the ground plane, which provides coupling between a patch and a ring microstrip line with two ports. It is located at the center of a choke horn antenna. The simulated antenna presents an axial ratio <3 dB and a realized gain close to 0 dB over a 400 MHz bandwidth (8.0–8.4 GHz) at the limit of coverage, i.e. 65° whatever the azimuth angle (φ) and the port. A 20 dB matching for each port and 13 dB isolation characteristics between the two ports have been achieved on this bandwidth. It has been realized and successfully measured.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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References

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