Repozytorium publikacji - Politechnika Gdańska

A 3-D printable, planar, metal-dielectric metasurface-based, 2-D beam-steering system for aperture-type antennas is presented in this paper. This beam steering system, also known as the near-field meta-steering system, comprises two fully passive phase-gradient metasurfaces placed in the antenna’s nearfield region to steer the radiation beam. To address the non-uniform electric field phase of the aperture antenna, phase correction is also incorporated into the bottom metasurface placed on top of the antenna aperture in its near-field to enhance the far-field radiation of the antenna. Near-field phase transformation and phased array antenna theory concepts are applied to design the proposed metasurfaces. Two types of metal-dielectric unit cells are implemented to provide a phase range of 360◦ . The height of each metasurface is only 6.25 mm (0.25λ0), and the height of the whole system is only 1.56 λ0 at 12 GHz. The proposed beam steering system with a resonant cavity antenna can steer the beam to a maximum of ±44◦ in the elevation plane and 360◦ in the azimuth plane with only a 1.4 dB deviation in directivity over the full steering range.

Autorzy

• Md Yeakub Ali,
• Ali Lalbakhsh,
• Khushboo Singh,
• prof. dr inż. Sławomir Kozieł link otwiera się w nowej karcie ,
• dr inż. Łukasz Gołuński link otwiera się w nowej karcie