An Ultra-Wideband Lossy Polarization Conversion Metasurface for RCS Reduction
This paper proposes a lossy reflective circular polarization conversion metasurface (PCM), which can achieve circular polarized (CP)-maintaining reflection and absorption. In this way, the magnitude of the cross-polarization reflection coefficient of the PCM under CP incidence can be kept at less th...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Korean Institute of Electromagnetic Engineering and Science
2025-05-01
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| Series: | Journal of Electromagnetic Engineering and Science |
| Subjects: | |
| Online Access: | https://www.jees.kr/upload/pdf/jees-2025-3-r-295.pdf |
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| Summary: | This paper proposes a lossy reflective circular polarization conversion metasurface (PCM), which can achieve circular polarized (CP)-maintaining reflection and absorption. In this way, the magnitude of the cross-polarization reflection coefficient of the PCM under CP incidence can be kept at less than −10 dB in the frequency range of 6.7–40.9 GHz. In addition, the phase of its co-polarized reflection coefficients can be changed freely by the Pancharatnam-Berry phase generated by rotating its unit cell structure. When the unit cell structure is rotated by 0°, 45°, 90°, or 135°, the lossy PCM can be used as one of the four types of coding elements for a 2-bit absorptive coding metasurface (ACM). Thus, based on the lossy PCM, this paper also proposes an ultra-wideband 2-bit ACM. The simulation and experimental results show that the proposed ACM can achieve effective radar cross section reduction under normal incidence in the ultra-wideband frequency band from 6.8 to 41.4 GHz with a relative bandwidth of 143.6%. Moreover, it has the advantages of polarization insensitivity and wide incident angle. |
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| ISSN: | 2671-7255 2671-7263 |