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

Abstract : — This paper presents an original solution to design a compact dual circularly polarized isoflux antenna (DCPIA) 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 centre of a choke horn antenna. The simulated antenna presents an axial ratio (AR) lower than 3 dB and a realized gain (RG) close to 0 dB over a 400 MHz bandwidth (8.0-8.4GHz) at the limit of coverage (LOC), 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.
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International Journal of Microwave and Wireless Technologies, Cambridge University Press/European Microwave Association 2017, pp.1 - 8. 〈10.1017/S1759078716001410〉
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Eric Arnaud, Cyrille Menudier, Jamil Fouany, T Monediere, M Thevenot. X-band compact dual circularly polarized isoflux antenna for nanosatellite applications. International Journal of Microwave and Wireless Technologies, Cambridge University Press/European Microwave Association 2017, pp.1 - 8. 〈10.1017/S1759078716001410〉. 〈hal-01431624〉

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