Nonuniform Transmission Line Model for Electromagnetic Radiation in Uniform Lossy Medium

The electromagnetic systems in submarine objects may generate electromagnetic radiation in seawater and pose a risk of exposing the submarines to hostile detector. It is of significance to investigate the radiation property of objects submerged in seawater. In this paper, the seawater is considered as a uniform lossy medium, and the electromagnetic radiation in it is analyzed with spherical expansion method. Especially, the nonuniform transmission line model (NTL) for electromagnetic radiation in free space is extended to uniform lossy media. Some numerical results of the equivalent parameters of the NTL models are examined.