Coaxial Cable Theory for RF Applications
When we design telecommunications systems we consider a large number of factors - beamwidth, bandwidth, carrier frequency, Fresnel zones, intermodulation, the list goes on.
On the other hand - when it comes to cabling, we really only need to compare the strength and quality signal - that is, the signal that goes in, to the signal that comes out.
Transmission of DC over a physical medium requires two conductors to complete the circuit - the 'go' wire, and the 'return' wire.
When it comes to RF transmission, the coaxial cable becomes a type of transmission line, the go wire takes the form of a centre conductor, and the return wire, known as the outer conductor, consists of an electrical shielding that surrounds the centre conductor.
To learn more, read our Guide to Coaxial Cable Theory for RF Applications