期刊
OPTICS COMMUNICATIONS
卷 530, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.optcom.2022.129101
关键词
Ultra-wideband; Polarization converter; Metasurface; Polarization conversion ratio; RCS reduction
类别
In modern communication systems, the issue of polarization is addressed by designing a high efficient polarization converting metasurface (PCMS) that can reduce the radar cross section (RCS). The PCMS achieves a high polarization conversion ratio with a wide fractional bandwidth. The proposed PCMS is used in an array configuration to reduce the RCS in an ultra-wide frequency range.
In modern communication systems, polarization has always been a major issue. Traditional polarization converters have limited uses because of their enormous size and narrow bandwidth. In this paper, an ultra-wideband and high efficient polarization converting metasurface (PCMS) is designed for radar cross section (RCS) reduction. The designed PCMS consists of I-shape unit cell manifesting linearly polarized (LP) incident wave to its orthogonal equivalent. In a frequency range of 10.5 GHz to 29.5 GHz, the design PCM achieves a polarization conversion ratio (PCR) more than 90% with 95% fractional bandwidth (FBW). The designed PCMS is used in a triangular chessboard configuration to reduce the RCS. To obtain destructive interference, the proposed array consists of two-unit cells, PCMS and its mirror, with a phase difference of 180 +/- 37 degrees. To reduce RCS, the proposed PCMS unit cell is rotated at 90 degrees, 180 degrees, and 270 degrees for phase cancellation. The proposed array reduced RCS in the ultra-wide frequency range of 8.2 GHz to 29.4 GHz with 113% FBW. The proposed PCMS is validated experimentally. Simulation and experimental results are found in good agreement.
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