Capacitance of Multiple Annular Apertures With Floating Inner Conductors

Capacitance of multiple annular apertures with floating inner conductors is investigated. A boundary-value problem associated with the capacitance of thick multiple annular apertures is solved rigorously based on the Hankel transform, eigenfunction expansion, and superposition. The formulation for calculating the capacitance of each annular aperture is obtained in a fast convergent series form. Computation is performed to show the behavior of the capacitance in terms of the geometry of multiple annular apertures.