Resonance properties of finite dielectric cylinders placed on a grounded substrate

The resonance properties of finite height cylinders of high permittivity value, placed on a dielectric grounded substrate is analyzed, using a method of moments technique in conjunction with volume integral equations. The complex resonance frequencies are determined by describing the electric field inside the finite cylinder in terms of superposition of plane waves, satisfying individually the wave equations. A homogeneous system is derived using the Green´s function of the microstrip-grounded dielectric substrate and a Galerkin technique. Complex resonance frequencies are determined by computing the stored average electric and magnetic energies. The proposed technique is proved to be numerically stable and accurate.