Generation of transient antennas using cylindrical-shaped charges

Date

2003-05

Journal Title

Journal ISSN

Volume Title

Publisher

Texas Tech University

Abstract

The anticipated use of electromagnetic pulse (EMP) weapons will be of significant importance to future military operations. The importance will be of such magnitude that, currently, countermeasures are being developed to counter anticipated countermeasures to these devices. One such counter-countermeasure is the use of a transient antenna during EMP weapon operation. This antenna limits the time of vulnerability for these devices, increasing the probability of success.

This report focuses on the use of a high velocity metal jet produced by a cylindrical shaped charge with a conical liner. The design of the shaped charge is discussed in detail as well as the important factors for producing a jet capable of radiation. The metal jet is tested for electrically conductive length over time. It is also tested for radiation capabilities as a monopole antenna, operating in the 1 GHz frequency regime.

It is shown that the use of cylindrical shaped charges to generate transient antennas is certainly feasible. This was accomplished by recording the reflected power from the transient antenna along with the received power of a dipole antenna, located within the explosive testing chamber. The timing associated with the minimum levels of reflected power corresponds to the timing of the maximum levels recorded for received power.

Description

Citation