Microwave Orbital Angular Momentum Beam Generation Based on Circularly Polarized Metasurface Antenna Array

Jianchun Xu1

Yanan Hao1

Ke Bi1,Email

Ru Zhang

Shanguo Huang1,Email

Ji Zhou2,Email

1 State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China

2 State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

Abstract

A V-shaped metasurface structure is applied in the design of circularly polarized antenna for excellent polarization performance. By means of structural parameter optimization, a 0.34 dB axial ratio is obtained. This proposed antenna has a compact dimension of 0.272λ0 x 272λ0 x 0.02λ0,which is beneficial for the practial applications. Several proposed metasurface antennas are fabriated and measured to verify the rationality of design. The simulated and measured results of the OAM beams well demonstrate the capability of this circularly polarized metasurface antenna array in generating OAM beam.