Single-dipole antenna on a metasurface for broadband circularly polarized radiation

Son Xuat Ta, Quang Son Ho, Khac Kiem Nguyen and Chien Dao-Ngoc

Journal of Electromagnetic Waves and Applications, 2018, vol. 32, issue 4, 413-427

Abstract: This paper investigates a low-profile broadband circularly polarized (CP) antenna, which is composed of a single-dipole on a metasurface. Surface waves propagating on the metasurface are excited to generate extra-resonances for the antenna system, which are utilized to broaden the antenna bandwidth. The metasurface, which is a lattice of 5 × 5 truncated-corner square patches, is used for converting the linearly polarized wave from the dipole source to CP wave at the broadside. A prototype operating at the frequency of about 2.4 GHz is designed, fabricated, and tested. For an easy realization and a low-cost, the dipole and metasurface are printed on top and bottom sides of a single substrate, respectively, which is placed above the ground plane via a structural-foam. The final design, with an overall size of 100 mm × 100 mm × 14.2 mm (0.8λo × 0.8λo × 0.114λo at 2.4 GHz), resulted in a |S11| 93% within the operational bandwidth.

Date: 2018
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DOI: 10.1080/09205071.2017.1394224

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