Hello everyone. I have a query. Suppose we have a linear to linear polarization conversion unit cell. We make its mirror unit to achieve 180 degree phase difference. Now, we make a checkerboard metasurface with 1010 arrangement.
My question is, whether after designing a checkerboard metasurface, we will achieve RCS reduction only or if we can also achieve linear to linear polarization conversion.
Your answers will be highly appreciated. Thank you
Hello Abdul Majeed this is my answer to your question.
When designing a checkerboard metasurface using alternating unit cells with 180-degree phase differences, the metasurface will exhibit both Radar Cross Section (RCS) reduction and polarization conversion, depending on the specific design parameters.
RCS Reduction: The checkerboard arrangement with alternating phase differences creates destructive interference in reflected waves, leading to significant RCS reduction. This effect is well-known for metasurfaces and is often one of the primary goals when using such structures.
Linear to Linear Polarization Conversion: The linear-to-linear polarization conversion properties will depend on the individual unit cells. If the original unit cells are designed to convert linear polarization (e.g., by inducing anisotropy or birefringence), then the metasurface as a whole can still exhibit polarization conversion. The mirror symmetry and checkerboard arrangement won’t inherently cancel the polarization conversion effect unless specifically designed to do so.
Therefore, in your checkerboard metasurface design, you can achieve both RCS reduction and linear-to-linear polarization conversion, provided the unit cells are designed for polarization conversion. However, the polarization behavior may vary based on the specific orientation and periodicity of the metasurface.
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