The invention relates to the technical field of special cables, in particular to an anti-
electromagnetic interference double-shielding
signal cable for precise instruments, which comprises conductor units, insulating
layers, wire pair shielding
layers, a filling buffer layer, a self-adaptive conductive layer, an inner main shielding layer, a bonding layer, an outer main shielding layer and a sheath layer, through combination of the
graphene composite conductor and the low-
dielectric insulating layer, 10GHz
signal attenuation is smaller than or equal to 0.5 dB / m,
signal transmission errors are greatly reduced, through cooperation of the 3D braided shielding layer and the filling buffer structure, the
bending fatigue life of the signal cable is larger than or equal to 200,000 times, through self-repairing design of the
liquid metal microcapsules, the shielding effectiveness of a damaged part is recovered, and the service life of the signal cable is prolonged. Protrusions are arranged on the inner layer, form mechanical
occlusion with a microscopic
rough surface of a
copper foil composite layer on the inner main shielding layer, and are matched with a plurality of pits in the surface of the outer layer to form point-surface composite contact with a 3D woven silver-plated
copper wire layer of the outer main shielding layer, so that the peel strength of the inner main shielding layer and the outer main shielding layer is greatly improved.