Multiband Pyramidal Antenna Loaded With a Cutoff Open-Ended WaveguideReport as inadecuate




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1 LAAS - Laboratoire d-analyse et d-architecture des systèmes Toulouse 2 LAPLACE - Laboratoire Plasma et Conversion d-Energie Toulouse 3 CNES - Centre National d-Etudes Spatiales

Abstract : An original and flexible pyramidal antenna for satellite or terrestrial application services is presented. The ground plane of the antenna is perforated and loaded with a cutoff open-ended waveguide: this original configuration leads to a good tradeoff between rear radiation and impedance matching. Trap-loads are used to achieve multiband operation while frequency agility may be simply obtained by loading the radiating element by radio-frequency switches. The antenna radiates linearly or circularly polarized electromagnetic fields with quasi-hemispheric radiation patterns at multiple operating frequencies. Several prototypes have been simulated, manufactured, and finally measured. A specific application is given in this paper for a triband GPS-Galileo-MicroSat Telemetry antenna to combine positioning and telemetry applications. The experimental results confirm the good performances observed with the electromagnetic simulations.

Keywords : trap-loads Cutoff waveguide loading GPS-Galileo-MicroSAT telemetry services multiband antenna pyramidal structure trap-loads.





Author: Sami Hebib - Hervé Aubert - Olivier Pascal - Nelson Fonseca - Lionel Ries - Jean-Marc Lopez -

Source: https://hal.archives-ouvertes.fr/



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