Propagation of Surface Waves on a Buried Coaxial Cable with Periodic Slots

Consider a coaxial cable with a periodic array of slots in the outer conductor. The cable is buried at a fixed depth below the surface of the earth as one component of an intruder detection system. In this paper, we use an eccentric cylindrical model of the air-earth interface to develop the theory for surface-wave propagation on the buried cable. Numerical results are included for the phase velocity and attenuation constant as functions of the various parameters.