Sub-wavelength layered three-dimensional broadband absorbing structure based on a loss type frequency selective surface
A frequency-selective surface, sub-wavelength technology, applied in the field of electromagnetic fields and microwaves, can solve the problems of difficult low-frequency absorption performance, complex preparation process, poor absorption effect, etc., and achieve the effect of light weight, thin thickness, and wide operating frequency band.
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[0020] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.
[0021] Figure 1-Figure 4 A schematic diagram showing a sub-wavelength layered three-dimensional broadband absorbing structure based on a lossy frequency selective surface according to an embodiment of the present invention. In this embodiment, the broadband absorbing structure is a periodic array structure composed of multiple structural units, where each structural unit, such as figure 1 , 2 As shown, it includes four ring-shaped loss-type frequency selective surface...
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