<title>Prediction of radiation pattern of a buried leaky coaxial cable</title>

Abstract

Theoretical and experimental investigations of the radiation properties of a buried leaky coaxial cable (LCC), as a guarding radar system, are presented for various.artificial and natural local inhomogeneous conditions along the cable system. The theoretical model of two coupling coaxial lines, outside which consists a sub-soil medium, is introduced to describe interactions of two modes, external and internal, which determine the working characteristics of such a leaky coaxial cable. The vertical and the horizontal distribution of radiation along and across the cable at height h above the ground are examined experimentally by means of a loop of the LCC buried in the sub-soil medium. The comparison between experimental data and theoretical predictions of radiation directivity of the LCC for the guarding radar system is presented. The possibilities of generating a complicated interference picture of such a radar pattern caused by different kinds of local inhomogeneities are discussed theoretically and studied experimentally.

Development of Underground Perimeter Intrusion Detection System

“…The control device monitors electromagnetic fields to detect and look for changes caused by intrusions. The research presented in [7] focused on investigating the radiation pattern of a buried leaky coaxial cable. The research in [8] explored the use of buried underground fiber optic cables for border protection.…”