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Analysis and design of compact antennas in cavity based on metasurfaces for multiband GNSS applications

Abstract : Global Navigation Satellite Systems (GNSS) are widely used today for a plethora of civil and defense applications, including navigation of flying or moving platforms. Galileo, GPS or Glonass are three of the GNSS constellations considered in this thesis. The aim of this work is to develop a compact antenna, which is able to cover multiple GNSS bands: three around 1578 MHz (L1, G1, E1) in a first time and the whole band ([1164-1610] MHz) in a second time. These antennas are intended to be integrated into projectiles mainly constituted of metal. For this reason, the antenna must be embedded in a metallic cavity to not affect the carrier aerodynamic properties and nor its mechanical stability. Integrating microstrip antennas in metallic cavities offers several advantages, like miniaturization, isolation or surface wave reduction; however, this leads to a drastic reduction of the antenna bandwidth. The most straightforward solution to circumvent this limitation consist in enlarging the metal cavity size. Nonetheless, this approach cannot be applied in many cases when the carrier imposes stringent dimensional limitations. Owing to the above-mentioned specifications, the use of a metasurface-inspired microstrip antenna is proposed and investigated, since previous results have demonstrated that classical antenna structures do not comply with the requirements. The objectives of the thesis are to design and characterize linearly-polarized and circularly-polarized antennas covering multiple bands of GNSS. Linear polarization is considered for the first studies, as these antennas are not intended to be used in an environment with multi-path signals. Circular polarization is addressed in a second time. Finally, the extension of the bandwidth to the whole GNSS bands is considered.
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https://theses.hal.science/tel-03045846
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Submitted on : Tuesday, December 8, 2020 - 10:57:26 AM
Last modification on : Wednesday, April 27, 2022 - 4:42:08 AM
Long-term archiving on: : Tuesday, March 9, 2021 - 6:57:11 PM

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  • HAL Id : tel-03045846, version 1

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Laura Garcia Gamez. Analysis and design of compact antennas in cavity based on metasurfaces for multiband GNSS applications. Electronics. Université Rennes 1, 2020. English. ⟨NNT : 2020REN1S014⟩. ⟨tel-03045846⟩

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