STUDY OF WIRES AND STRINGS OF FINITE SIZES

摘要

Recent results from RCS measurements on metal wires, rods and dielectric strings are presented. For a cylinder at broadside to the incident wave, theoretical predictions from 3D formulas converted from 2D exact solutions are used for comparisons with the experiments. The line-of-sight orientation dependence is described by the polarimtric scattering matrix. Several types of interference effects are analyzed. Of particular interest is finding the suitable objects for the cross-polarized calibrations over a wide frequency range. Details from a 36" wire of radius 0.01" for calibrations in the VHF range are described. While the wire is supported by fine fishing lines, mitigation of the unwanted string echoes is important.