李燕,霍树云,李尔平. 新型电阻膜吸波体在封装辐射抑制中的应用[J]. 电波科学学报,2023,38(2):342-354. DOI: 10.12265/j.cjors.2022030
      引用本文: 李燕,霍树云,李尔平. 新型电阻膜吸波体在封装辐射抑制中的应用[J]. 电波科学学报,2023,38(2):342-354. DOI: 10.12265/j.cjors.2022030
      LI Y, HUO S Y, LI E P. New resistive film absorber in the application of packaging radiation suppression[J]. Chinese journal of radio science,2023,38(2):342-354. (in Chinese). DOI: 10.12265/j.cjors.2022030
      Citation: LI Y, HUO S Y, LI E P. New resistive film absorber in the application of packaging radiation suppression[J]. Chinese journal of radio science,2023,38(2):342-354. (in Chinese). DOI: 10.12265/j.cjors.2022030

      新型电阻膜吸波体在封装辐射抑制中的应用

      New resistive film absorber in the application of packaging radiation suppression

      • 摘要: 为抑制封装系统中无意的电磁辐射,设计了一种单元尺寸为0.079λL× 0.079λL、厚度为0.057λL的新型电阻膜超材料吸波体结构. 该电阻膜超材料吸波体通过在玻璃基板的两侧溅射氧化铟锡薄膜,并在顶层设计图案化的强耦合结构实现了超带宽吸收. 通过仿真和实物测试证实了该吸波体结构在17~41 GHz频率范围内具有90%以上的吸收率. 为了进一步研究其电磁辐射抑制能力,将该吸波体应用于封装系统模型中,仿真结果显示在18~47 GHz频率范围内3 m辐射电场明显降低,最佳抑制效果达到18 dB. 所有结果表明所提出的电阻膜吸波体具有小型化、超宽带、极化不敏感和角度稳定的特性,其良好的辐射抑制能力为封装系统的辐射超标问题提供了新的解决思路.

         

        Abstract: In order to suppress the unintentional electromagnetic radiation in packaging systems, a novel resistive film metamaterial absorber structure with the cell size of 0.079λL × 0.079λL and the thickness of 0.057λL is designed. The resistive film absorber achieves ultra-broadband absorption by sputtering indium tin oxide films on both sides of the glass substrate and designing a patterned strong coupling structure on the top layer. Results of simulation and experiment confirm that the absorber structure has more than 90% absorptivity in the frequency range from 17 GHz to 41 GHz. In order to further investigate the electromagnetic radiation suppression capability, the absorber is applied to a model of the packaging system, and the simulation results show that radiated electric field at 3 meters is significantly reduced in the frequency range from 18−47 GHz, and the best suppression effect reaches 18 dB. All the results show that the proposed resistive film absorber is miniaturized, ultra-broadband, polarization-insensitive and angle-stable, and the good radiation suppression capability provides a new solution to the excessive radiation problem of packaging systems.

         

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