SCATTERING OF ELECTROMAGNETIC WAVES FROM A RANDOM ROUGH TIME-VARYING CONDUCTINGSURFACE

Abstract

THE SCATTERING OF PLANE ELECTROMAGNETIC WAVES FROM RANDOMLY UNEVEN SURFACES ISTHEORETICALLY INVESTIGATED BY USING MORE COMPLICATED MODELS FOR THE SCATTERING SURFACE. IN THE FIRST PART OF THE WORK A TIME-VARYING RANDOM ROUGH SURFACE IS EXAMINED. THE STOCHASTIC PROCESS, THAT DESCRIBES THE ELEVATION FROM ITS MEANPLANE, IS CONSIDERED NONSTATIONARY OR NONHOMOGENEOUS. USING THE BOUNDARY PERTURBATION APPROACH OR THE PHYSICAL OPTICS INTEGRAL ALONG WITH THE QUASI-STATIONARY APPROXIMATION, IT IS PROVEN THAT THE INCOHERENT POWER SCATTERED FROM A NONSTATIONARY AND HOMOGENEOUS SURFACE VARIES WITH TIME THROUGH THE TIME-VARYING SURFACE STATISTICS. ON THE OTHER HAND THE ANGULAR SPECTRUM OF THE FIRST-ORDER SCATTERING CROSS SECTION PER UNIT AREA OF A STATIONARY AND NONHOMOGENEOUS ROUGH SURFACE IS PROVEN TO BE PROPORTIONAL TO THE AVERAGE OF ITS POSITION-VARYINGSPATIAL-TEMPORAL WAVENUMBER SPECTRUM. (SHORTENED)

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DOI
10.12681/eadd/0147
Handle URL
http://hdl.handle.net/10442/hedi/0147
ND
0147
Alternative title
ΣΚΕΔΑΣΗ ΗΛΕΚΤΡΟΜΑΓΝΗΤΙΚΟΥ ΚΥΜΑΤΟΣ ΑΠΟ ΑΓΩΓΙΜΗ ΕΠΙΦΑΝΕΙΑ ΣΤΟΧΑΣΤΙΚΑ ΑΝΩΜΑΛΗ ΚΑΙ ΧΡΟΝΙΚΑ ΜΕΤΑΒΑΛΛΟΜΕΝΗ
Author
Chrissoulidis, Dimitrios (Father's name: Platon)
Date
1983
Degree Grantor
Aristotle University Of Thessaloniki (AUTH)
Committee members
ΚΡΙΕΖΗΣ ΕΠΑΜΕΙΝΩΝΔΑΣ
Discipline
Engineering and Technology
Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
Electromagnetics; RADIOOCEANOGRAPHY; RELATIVISTIC SCATTERING; Rough surfaces; SCATTERING OF RADIO WAVES
Country
Greece
Language
Greek
Description
232 σ.
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