Abstract:
An accurate and efficient technique is presented
for obtaining numerical solutions of microstrip structures at
low frequencies. In this approach, a new form of the
electric-field spatial-domain Green's function is used in a
symmetrical form that simplifies the discretization of the
integral equation using the method of moments (MoM).
Hence, a Helmholtz decomposition of the unknown currents
is achieved by applying the loop-tree decomposition of the
currents. However, the MoM matrix thus obtained still
cannot be solved efficiently by iterative solvers due to the
large number of iterations required. Consequently, a
permutation of the loop-tree currents by a connection matrix
is proposed to arrive at a current basis that yields a MoM
matrix that can be solved efficiently by iterative solvers.
