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Nouvelle topologie d'antennes multi-bandes pour applications spatiales

Sami Hebib 1
1 LAAS-MINC - Équipe MIcro et Nanosystèmes pour les Communications sans fil
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : There is a constant rise of interest for multiband antennas, mainly driven by the objective to reduce the number of onboard and ground antennas by integrating several applications on a single radiating element. Most of the proposed multiband antennas in the literature exhibit correlated operating frequencies. Consequently, the ratios between these operating frequencies are not independent and therefore not easy to monitor. Moreover, at different operating frequencies, the radiation patterns of these antennas are not much similar and are difficult to control. In this work, an original multiband antenna topology with independent and easily adjustable operating frequency ratios is proposed. The simple design of the radiating elements of this antenna leads to a flexible concept, that is, the antenna can be easily adjusted in order to fulfill other frequency requirements. The proposed antenna is composed of four identical radiating elements printed on the four sides of a pyramid. The multiband (or reconfigurable) behaviour of the antenna is obtained with trap-loads (or Radio-Frequency (RF) switches). The ground plane of the antenna is loaded with a cut-off waveguide: this original configuration allows minimizing, or even monitoring the antenna rear radiation. According to the feeding law of the four radiating elements, the antenna radiates linearly or circularly polarized electromagnetic fields. An original feeding circuit with circular polarisation diversity (right or left handed) for the multiband pyramidal antenna is also presented. Finally, radio-navigation and telemetry applications of the multiband pyramidal antenna, including electromagnetic simulations and measurements, confirm the good performance of the proposed antenna.
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Submitted on : Tuesday, December 16, 2008 - 3:07:54 PM
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  • HAL Id : tel-00347683, version 1

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Sami Hebib. Nouvelle topologie d'antennes multi-bandes pour applications spatiales. Micro et nanotechnologies/Microélectronique. Université Paul Sabatier - Toulouse III, 2008. Français. ⟨tel-00347683⟩

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