Accession Number:

ADA402293

Title:

Aperture Sampling Limitations of Linear and Circular Arrays for Direction Finding and Nulling

Descriptive Note:

Technical rept.

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

2002-05-14

Pagination or Media Count:

35.0

Abstract:

Is there an upper limit to the number of elements or, equivalently, samples, that can be usefully employed for direction finding or nulling a set of incoming wavefronts within a fixed size aperture Mathematical theory states that this number is unlimited, but this result requires a perfect knowledge of the wavefront correlation matrix i.e., a noise- and error-free environment and infinite precision. To answer the question realistically, one must consider the element-to-element correlation matrix resulting from a set of incoming wavefronts impinging on an array of antenna elements. This matrix becomes ill-conditioned as the number of elements within the aperture increases.

Subject Categories:

  • Direction Finding
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE