WHO INVENTED CO-AX CABLE
Ernst Werner von Siemens,best remembered for having built an extensive network of telegraph lines across Europe, recieved a German patent for coaxial cable in 1884. At the time of his death in 1892, no practical use of his invention had yet been made. The first commercial application of coaxial cable as a transmission line was probably in carrying live television images of the Berlin Olympic Games, over 93-mile path to Leipzig, in 1936.
The unit of conductance is the siemens, in honour of the father of coaxial cable.
In 1894, Oliver Lodge first demonstrated the use of waveguide transmission at Londons Royal Institution.