Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing, School of Information and Communication, Guilin University of Electronic Technology, Guilin, China
Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing, School of Information and Communication, Guilin University of Electronic Technology, Guilin, China
Shunlan Zhang
Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing, School of Information and Communication, Guilin University of Electronic Technology, Guilin, China
Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing, School of Information and Communication, Guilin University of Electronic Technology, Guilin, China
Dan Yang
Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing, School of Information and Communication, Guilin University of Electronic Technology, Guilin, China
Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing, School of Information and Communication, Guilin University of Electronic Technology, Guilin, China
This paper proposes a broad-band linear-to-circular polarization converter based on a multi-layer stripline metasurface. The structure is constructed of three stripline metallic layers stacked with two dielectric plates, and it has different electromagnetic response characteristics in two orthogonal directions. Based on this, the amplitude of the two orthogonal components of the transmitted wave is equal, and the phase difference is 90°. To better understand the working principle of the proposed converter, a detailed equivalent circuit model is presented. The simulation results indicate that the converter can convert linearly polarized incident waves into circularly polarized transmitted waves in the frequency range of 4.96–12.44 GHz. For an increased incident angle of 50°, the device can still maintain an axial ratio bandwidth of 53.7% in the x-z and y-z planes. Because of its broadband, small size, and wide-angle, the proposed converter can be integrated into a linearly polarized antenna system to generate circularly polarized waves without significantly affecting antenna performance.
