Accession Number:

ADA143913

Title:

Approximate Methods for Obtaining the Complex Natural Electromagnetic Oscillations of an Object.

Descriptive Note:

Technical rept.,

Corporate Author:

OHIO STATE UNIV COLUMBUS ELECTROSCIENCE LAB

Personal Author(s):

Report Date:

1984-02-01

Pagination or Media Count:

299.0

Abstract:

The complex natural resonances poles of an object are excitation aspect and polarization independent. The primary goal of this dissertation is to develop a rational function approximation RFA for use in pole extraction from the measured scattering spectrum data of broadband radar systems. Applications of the RFA are demonstrated for a variety of simple as well as complex objects. The results obtained are compared with those poles extracted using other methods. To overcome noise problems, two preprocessing techniques--a sum operator and a zero-phase-shift digital filter are developed. The minimum signal-to-noise ratio additive is explored such that reliable pole extraction is still feasible. Finally, RFA are applied to the measured data of complex geometric targets scale models of aircraft.

Subject Categories:

  • Active and Passive Radar Detection and Equipment
  • Electricity and Magnetism
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE