研究目的
To design and implement a broadband polarization-insensitive multi-layered microwave absorber using resistive ink that covers the entire S, C, X and Ku bands with the smallest thickness compared to state-of-the-art absorbers.
研究成果
The proposed multi-layered broadband absorber using resistive ink demonstrates broadband absorption from 2.00 GHz to 18.50 GHz with a thickness of 0.082λL, outperforming previously reported absorbers in terms of bandwidth ratio and thickness. The experimental results validate the design, showing good agreement with simulations.
研究不足
The screen printing technique may lead to non-uniform ink thickness, affecting the absorber's performance. The absorber's performance is also sensitive to the conductivity of the resistive ink.
1：Experimental Design and Method Selection:
The absorber is constructed using layers of resistive surface printed on FR4 sheets with resistive ink, separated by air spacers.
2：Sample Selection and Data Sources:
The unit cell is simulated using HFSS with periodic boundary conditions.
3：List of Experimental Equipment and Materials:
FR4 dielectric substrate, resistive ink, air spacers, metal plate.
4：Experimental Procedures and Operational Workflow:
Resistive patterns are printed on FR4 sheets using screen printing technology, assembled with foam spacers for mechanical stability, and measured using free space measurement technique.
5：Data Analysis Methods:
The reflection coefficient is analyzed to determine absorption bandwidth and performance.
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