Accession Number : AD0475434

Title :   A BROADBAND THEORY FOR LINEAR ARRAYS.

Descriptive Note : Report of Project MICHIGAN,

Corporate Author : MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY

Personal Author(s) : Sharpe, C. Bruce ; Crane, Robert B.

Report Date : DEC 1965

Pagination or Media Count : 26

Abstract : The effect of broadband signals on the far-zone field of long arrays is investigated in terms of the energy radiation pattern. A generalized directive gain is introduced which depends on the signal spectrum. With maximum directivity as a criterion it is shown that the problem of optimizing a long isotropic array with respect to a given signal can be associated with a classical eigenvalue problem. The concept of array bandwidth is introduced. Computed curves for directivity, directivity, directive gain, and signal distortion are given in terms of this parameter and signal bandwidth. It is shown that while little improvement in directivity is achieved by optimizing the distribution coefficients of an array, a substantial reduction in side-lobe level is obtained. (Author)

Descriptors :   (*ANTENNA ARRAYS, BROADBAND), THEORY, ANTENNA RADIATION PATTERNS, GAIN, BANDWIDTH, DISTORTION, ANTENNA LOBES, REDUCTION, RADAR ANTENNAS, MATHEMATICAL ANALYSIS.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE