Composite structure design of a broadband metamaterial absorber based on magnetic composites.

• The addition of magnetic materials broadens the effective absorption bandwidth. • Synergy between dielectric and magnetic losses strengthens microwave absorption. • The composite structure design improves the wave absorption performance. • 3 mm CSMMA has an effective absorption bandwidth of 11.53 GHz. The requirements for electromagnetic wave absorbing materials are increasing as modern technology advances. However, traditional absorbing materials have limitations due to their thickness and incompatibility with high and low frequencies, and metamaterial absorbers have limitations due to their narrow effective absorption bandwidth. This paper overcomes these problems and designs and prepares a broadband, thin and light metamaterial absorber. The effective absorption bandwidth of the composite structure metamaterial absorber (CSMMA) with a thickness d 1 of 3 mm reaches 11.55 GHz with the addition of FeSiBPCuY 5 p/paraffin magnetic composite into the metamaterial absorber and the optimization of the structural parameters. The composite structure design greatly improves the absorption performance of the metamaterial absorber. The advantages of the tunable frequency absorption characteristics of the metamaterial absorber and the high-frequency broadband absorption performance of the magnetic wave absorbing materials are fully exploited in the design of the absorber. Which is of great significance for the development of broadband and thin-absorbing materials. This absorber can be adapted to meet the needs of practical applications by adjusting its structural design, expanding its range of applications and having a substantial influence on the use of wave absorbing materials. [ABSTRACT FROM AUTHOR]