Accession Number:

ADA361850

Title:

Time-Domain Deconvolution Removes the Effects of Near-Field Scatterers

Descriptive Note:

In-house rept.

Corporate Author:

AIR FORCE RESEARCH LAB ROME NY SENSORSDIRECTORATE

Personal Author(s):

• Roberts, Thomas M.

Report Date:

1998-05-01

Pagination or Media Count:

22.0

Abstract:

This paper studies a deconvolution problem that models the removal of interference caused by objects in the near field of antennas. Such interference affects antennas on complicated objects, such as ships and aircraft. Infinitely many time-domain deconvolution algorithms are considered here, of which the best one -- being stable and Oh2 accurate, and Oh4 accurate after Richardson extrapolation -- may compete with Fourier and Laplace methods. Special care is taken to find an algorithm that accommodates discontinuity-related numerical noise in finite-difference-time-domain data.

Descriptors:

• *ANTENNA RADIATION PATTERNS
• *NEAR FIELD
• SIGNAL PROCESSING
• LINEAR SYSTEMS
• FINITE DIFFERENCE THEORY
• ELECTROMAGNETIC INTERFERENCE
• INTEGRAL EQUATIONS
• TIME DOMAIN
• LAPLACE TRANSFORMATION

Subject Categories:

• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE