Design of wideband metamaterial absorber based on resistive film
Researchers have achieved precise control and isolation of electromagnetic wave based on the effective absorption and dissipation of electromagnetic wave energy with the absorber materials,which plays a crucial role in electromagnetic wave control.In order to achieve wideband stable absorption of the electromagnetic wave,a wideband metamaterial absorber based on the resistive film was proposed.The structure consists of three layers:a top layer with periodically arranged resistive films,a middle layer made of FR-4 dielectric substrate,and a bottom layer of metal back plate.The resistive films primarily comprise the conductive ink,which absorb electromagnetic wave energy and convert it into thermal energy for dissipation.The simulated results demonstrate that the proposed absorber can effectively absorb incident electromagnetic waves in the range of 14.2-25.3 GHz,with an absorption of over 90％,an average absorption rate of 98.23％,and the polarization-insensitivity can also be maintained.To verify the feasibility of the design,the absorber sample was successfully fabricated by controlling the conditions of screen printing.And the actual measured values match well with the results obtained from the full-wave simulations,providing a valuable reference for the design of the absorber.
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维普
