With the rapid development of stealth technology

the microwave absorbing properties of composite materials are increasingly required. In this paper

SiC

f

/SiC 2D woven fabric was prepared by precursor impregnation and pyrolysis (PIP). The absorbing properties of SiC

f

/SiC 2D woven fabric

such as reflection loss

absorbing mechanism and influencing factors

were studied by means of experimental test and numerical simulation. The results show that the SiC

f

/SiC 2D woven laminates prepared in this paper have an effective absorption bandwidth of 3 GHz and a maximum reflection loss of –19.2 dB at the absorption peak of 9.7 GHz in the frequency range of 4–18 GHz. Its

microwave absorbing performance is closely related to the electromagnetic parameters of the fiber

the microstructural parameters and the incidence Angle of the electromagnetic wave. In addition

it is found that the absorption properties of the composites are mainly due to the special braided structure and the interaction between the fibers and the matrix. These interactions cause electromagnetic waves to be reflected

scattered and absorbed several times inside the material

thus achieving efficient electromagnetic wave attenuation. This paper not only helps to promote the application of SiC

f

/SiC composites in stealth technology

electromagnetic shielding and other fields

but also provides a useful reference for the research of other highperformance composites.