[ Instrument network instrument research and development ] The development of 5G technology will bring more reliable and lower latency information interaction, human-machine communication will be smoother and more convenient, and the Internet of Things will also be used in daily life, industrial production and the construction of smart cities Play a more important role. At the same time, the innovation of communication technology will make the surrounding electromagnetic environment more complicated, which puts forward higher requirements for electromagnetic protective materials, especially electromagnetic protective materials that are transparent to visible light. The development trend of 5G towards millimeter wave technology with larger bandwidth and higher transmission speed puts forward higher requirements for the existing transparent electromagnetic protection material system in terms of protection bandwidth, working band, visible light transmittance and electromagnetic shielding effectiveness. Greater challenge.
The flexible optoelectronic materials research team of Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, based on the previous ultra-thin metal research, through material optimization and structural design innovation, achieved a peak transmission of about 90% similar to the substrate material in the visible light band In the ultra-wide frequency range of 10-40GHz, electromagnetic shielding effectiveness of about 60dB is achieved. At present, the scientific research team is committed to further improving its key technical indicators and carrying out pilot-scale preparation of the material. It has completed the technical verification from a laboratory sample of 100mm×100mm to a pilot test with a width of 600mm, and now has the ability to supply small quantities, and its effectiveness and stability have been confirmed in the application of radio frequency devices.
Relevant research results are titled Record-high transparent electromagnetic interference shielding achieved by simultaneous microwave Fabry–Pérot interference and optical antireflection and published on ACS Applied Materials & Interfaces. The research work is supported by the key projects of the "13th Five-Year" equipment pre-research field fund, the National Natural Science Foundation of China, etc., and the technical support of the cooperation unit National University of Defense Technology in electromagnetic compatibility testing.
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