While reading the transmission lines in electromagnetic field theory ,I I observed that while analizinganalyzing different transmission lines like co-axial cable,two and two wire linelines, we are using the electric circuit model where we take the Circuitcircuit as a distributed network, but while analizinganalyzing the waveguidewave-guide we are mainly focused on the electric and magnetic field lines.why
Why do we analalize two structureanalyze the two structures differently mean one? One using Circuitcircuit theory model and another using electro magneticelectromagnetic theory?