On the behavior of thin-wire antennas and scatterers arbitrarily located within a parallel-plate region

In this communication, an integrodifferential equation for the current on a thin wire arbitrarily positioned between two parallel plates is formulated. Both the scattering and active antenna problems are considered in the formulation, and the numerical techniques for solving the equation are indicated. Special attention is paid to the resonances of the parallel-plate region and their effect on the antenna performance. Plots of the input admittance of various antennas are presented, as well as the results for a scattering element.