THE SCATTERED-FIELD RESPONSE OF A LINEAR ARRAY TO A STEP-FUNCTION ILLUMINATION.
Abstract
A limited investigation is made of the scattered-field response of a linear array of center-loaded cylindrical elements illuminated by a plane electromagnetic wave with a step function of time variation. The theoretical approach utilizes Fourier's theorem to express the transient response as a sum of the steady-state responses to the individual sine-wave components of the step-function illumination. The number of array elements and their spacing can be determined simply from the time variation of the backscattered field, provided the angle of incidence of the illumination is known and adequately large to separate the component transient waves. In the case of an N-element array, it is found that the transient field scattered in any arbitrary direction in the H plane can be represented as a summation of N appropriately time-delayed components, each with the same time variation as the field scattered in the reflected direction but with an amplitude reduced by a factor of 1/N. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 13, 1969
- Accession Number
- AD0685197
Entities
People
- Oliver D. Sledge
Organizations
- United States Naval Research Laboratory