A low reflection transmission line radiation suppression structure using miniaturized metamaterials

A low reflection scheme of suppressing electromagnetic radiation is proposed to shield electromagnetic radiation effectively and maintain high-quality signal transmission of flexible transmission lines by using metamaterial structures. The overall structure is composed of transmission line, dielectric interlayer and metamaterial shielding layer. The dielectric parts are made of flexible materials. By taking advantage of the ability to control and absorb electromagnetic waves and the characteristics of miniaturization of metamaterials, reflection component of radiation waves is decreased, influence on transmission performance is reduced, and flexibility of transmission lines is ensured. The simulated results indicate that the metamaterial structure with working frequency band of 23.10−28.30 GHz achieves an average shielding effectiveness of 10.10 dB for segmented coplanar waveguide (SCPW) transmission line, and maintaining transmission bandwidth of 23.49−30.96 GHz and 32.98−38.00 GHz. The measured and simulated results are basically consistent, and the proposed electromagnetic radiation shielding scheme of transmission line has characteristics of flexibility, miniaturization and low reflection, providing new possibilities for electromagnetic compatibility design of flexible electronic equipment.