Potential distributions through an annular aperture with a floating inner conductor

The potential distributions through an annular aperture in a thick conducti ng plane are considered when an inner conductor is electrically floating, T he charge conservation is used to relate the potential in terms of the tota l charge on an inner conductor. Numerical calculations are performed to ill ustrate the behavior of potential distribution, capacitances, and polarizab ilities in terms of the aperture geometry and incident field.