Flexible thin microwave absorbing patch: flake carbonyl iron and chopped carbon fibers oriented in resin matrix

Microwave absorbing patches are used in a wide range of applications including mobile devices, digital devices and electronic products. Here, we used flake carbonyl iron (FCI) and chopped carbon fibers (CF) as double absorbers to fabricate thin microwave absorbing patches by tape-casting method. FCI and CF were oriented in polyurethane-modified epoxy resin (PMER) matrix, resulting in strong anisotropy of the microstructure. The effects of CF...