Compact GNSS Metasurface-Inspired Cavity Antennas

L. Garcia-Gamez (1) , L. Bernard (1) , Sylvain Collardey (2) , H. Covic (1) , R. Sauleau (2) , K. Mahdjoubi (2) , P. Potier (3) , P. Pouliguen (3)

1 ISL - Institut franco-allemand de recherches de Saint-Louis
2 IETR - Institut d'Électronique et des Technologies du numéRique
3 Direction générale de l'Armement (DGA)

This paper presents an innovative circularly-polarized compact cavity antenna based on metasurfaces; the proposed design is explained starting from a linearly-polarized antenna based on similar concepts. The main objective is to cover three different GNSS systems, namely Galileo E1, GLONASS G1 and GPS L1, with a single antenna embedded in a metallic cavity. The aperture dimension is set to 0.26λ0×0.26λ0, with a central frequency of 1578 MHz. Loading the aperture with a metasurface allows an efficient radiation within such a small aperture size. Our experimental results are in very good agreement with the simulations, with an axial ratio lower than 2 dB between 1540 MHz and 1655 MHz.

Keywords: metasurface; GNSS; compact antenna; Circular polarization (CP); Index Terms-circular polarization

Domains: Engineering Sciences [physics]

L. Garcia-Gamez, L. Bernard, Sylvain Collardey, H. Covic, R. Sauleau, et al.. Compact GNSS Metasurface-Inspired Cavity Antennas. IEEE Antennas and Wireless Propagation Letters, 2019, 18 (12), pp.2652-2656. ⟨10.1109/LAWP.2019.2947791⟩. ⟨hal-02442762⟩