Coupling Between a Radiating Coaxial Cable and a Dipole Antenna

The coupling loss between a coaxial cable with a circumferential gap and a dipole antenna is analyzed. The numerical results have application to continuous-access guided communication (CAGC) and to related leaky feeder systems now being used in intramine communications. It is shown that the coupling is very strong in the neighborhood of the cable axis even when the linear distance between the dipole and the cable gap is large. This, of course, is a desirable feature of such limited-access communication systems.