Abstract

Methods have been developed for the treatment of field-to-wire coupling at superhigh frequencies (SHF's) and beyond. In this region, transmission-line lengths and wire separations become very large electrically, and field-to-wire coupling problems become intractable. Several types of transmission lines have been examined in the SHF range, including uniform and nonuniform transmission lines, coaxial transmission lines, and multiconductor transmission lines. Current distributions are found to be predominantly of a standing-wave or traveling-wave form. The higher order modes are not significant for those cases examined. Bounds may be obtained for induced currents in the field-to-wire problem by considering the transmission line as a receiving antenna. The maximum value of induced current under conditions of maximum susceptibility is shown to vary little with frequency.

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