Field calculation in single- and multilayer coaxial cylindrical shells of infinite length by using a coupled T-Ω and boundary element method

A method is presented for the calculation of the electromagnetic field in systems of single-layer or multilayer coaxial cylindrical shells of infinite length excited by an oscillating current source arbitrarily oriented inside the first shell. The electric vector potential T and the magnetic scalar potential Ω are used for the evaluation of the quantities of the problem. The Helmholtz equations for T and Ω are transformed into integral equations by the use of the Green´s function method. Applying the boundary element method, three systems of simultaneous equations have to be solved to give the sought field quantity