A numerical analysis of wire antennas loaded with varistor-composite materials

Author

Porti, Jorge A. ; Morente, Juan A.

Author_Institution

Dept. de Fisica Aplicada, Granada Univ., Spain

Volume

36

Issue

1

fYear

1994

fDate

2/1/1994 12:00:00 AM

Firstpage

23

Lastpage

31

Abstract

The behavior of wire antennas loaded at the driving point with varistor-composite materials is analyzed in the time domain via a numerical formulation. Varistor-composite materials are nonlinear transient arresters with a subnanosecond response time. Connecting these nonlinear elements in parallel with the feeding transmission line and adjusting the characteristic curves of varistor materials (i.e., current density and dielectric constant versus electric-field strength), the nonlinear load drains off currents of excessive potential levels. At operating voltages the material presents a higher impedance path and the arrester interference with the normal operation of the antenna under protection is minimal

Keywords

composite materials; dielectric-loaded antennas; dipole antennas; electromagnetic pulse; loop antennas; numerical analysis; varistors; EMP; antenna under protection; arrester; characteristic curves; current density; dielectric constant; driving point; electric-field strength; impedance; loaded antennas; loop antenna; moment method; nonlinear elements; nonlinear load; nonlinear transient arresters; numerical analysis; operating voltages; subnanosecond response time; time domain analysis; transmission line; varistor-composite materials; wire antennas; Arresters; Delay; Dielectric materials; Joining processes; Loaded antennas; Numerical analysis; Power system transients; Time domain analysis; Varistors; Wire;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.265476

Filename

265476