Electrical Characteristics of Sea-Water-Return Transmission Lines.

摘要

An experiment was conducted at sea to determine characteristics of three single copper conductor transmission lines. All three transmission lines incorporated sea-water as an electrical return path and graphite shielding of various constructions in an attempt to achieve desirable characteristics of coaxial transmission lines. The transmission lines were 20,000 feet long, 0.1 inches in diameter, and used braided Kevlar at a strength member. The primary problem addresses was measuring low frequency (<20kHz) attenuation and phase shift of the transmission lines as a function of configuration in the water column and as a function of graphite shield construction. Results of the experiment showed that transmission line electrical characteristics as much better when the line is fully payed out as opposed to part of the line being coiled.