A Note on the Derivation of the Fields in a Radial Line (Correspondence)

The concept of a radial transmission line is frequently used in the description of such devices as cylindrical cavity resonators and horn radiators. An approach to the prob-lem of determining the electric and magnetic fields in the radial line has been to solve Maxwell´s equations in component form with appropriate boundary conditions. While the following derivation yields nothing new, it does, however, have the advantages of being simple and of requiring a minimum of guess work as compared to other methods of solving this problem.