Clayborne D. Taylor

Electromagnetic pulse scattering in time-varying inhomogeneous media

A finite difference solution technique is used to solve Maxwells equations directly in the treatment of electromagnetic pulse scattering in a time-varying inhomogeneous medium. In particular the scattering from a cylindrical rod inside a cylindrical waveguide is considered where axial symmetry is obtained.

On the Response of a Terminated Twisted-Wire Cable Excited by a Plane-Wave Electromagnetic Field

The currents induced in the terminations of a twisted-pair cable are obtained for a plane-wave electromagnetic-field. Various termination configurations are considered and comparisons are made with the corresponding results for untwisted pairs. In special cases, the twisted cable may have a larger induced signal than the untwisted. Under various common restrictions, the induced signal is inversely proportional to either 1) the square of the number of turns or 2) the number of turns.

Electromagnetic Pulse Penetration Through Small Apertures

The electromagnetic field penetration through small apertures is discussed for general aperture shapes. Approximnate analytical expressions are obtained for the penetration fields. In particular the fields that penetrate a small aperture into the region between two parallel, perfectly conducting plates are determined and some numerical results are obtained.

Scattering from crossed wires

The electromagnetic scattering from two straight wires, which intersect perpendicularly, is considered. First, the current distribution on the wires is obtained by solving numerically a system of integral equations. Then the scattered fields and backscattering cross sections are obtained using standard techniques.

External Interaction of the Nuclear EMP with Aircraft and Missiles

The general problem of external coupling of the nuclear EMP to metal structures is discussed with attention directed toward aircraft and missiles. Theoretical and experimental data are presented for the skin current and charge densities induced on aircraft. Recomendations for future studies are also given.

On the Excitation of a Coaxial Line by an Incident Field Propagating Through a Small Aperture in the Sheath

A coaxial line having a small aperture in the sheath and terminating in arbitrary impedances is considered to be illuminated by an incident plane wave. The excitation of currents in the termination impedances is shown to depend upon three independent factors. Simple analytical forms are given for equivalent voltage and current sources of the aperture excitation.

External interaction of the nuclear EMP with aircraft and missiles

The general problem of external coupling of the nuclear EMP to metal structures is discussed with attention directed toward aircraft and missiles. Theoretical and experimental data are presented for the skin current and charge densities induced on aircraft. Recommendations for future studies are also given.

Cylindrical transmitting antenna: Tapered resistivity and multiple impedance loadings

A general formulation is presented which treats with accuracy the perfectly conducting antenna, the uniformly resistive antenna, the tapered resistive antenna, and the multiple impedance loaded antenna. The current distribution is obtained in analytic form that is easily used to obtain the effective length and radiated field. The presented theory has application in traveling-wave antenna design. Traveling-wave antennas are of interest for broadband and directional communication. Extensive numerical results are obtained, and comparisons are made with experimental data. The results indicate the feasibility of cylindrical traveling-wave antennas.

On Electromagnetic-Field Excitation of Unshielded Multiconductor Cables

Unshielded multiconductor cables are considered to be iliuminated by electromagetic plane-wave fields. A study of the currents that are induced in the terminations is made using quasistatic circuit theory, transmission line theory, and wire antenna theory. Questions of accuracy, ranges of validity, and general trends are addressed.

Response of a Terminated Transmission Line Excited by a Plane Wave Field for Arbitrary Angles of Incidence

An analysis to determine the response of an impedance-loaded transmission line configuration excited by a plane-polarized electric field of arbitrary spatial orientation has been needed for a long time. The purpose of the present paper is to meet this need by suggesting a method of solution based on the analysis of the simplest of such circuits: an impedance-terminated two-conductor transmission line. The theory is based on the use of the Rayleigh-Carson reciprocity theorem.