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Title of Thesis

Analysis Of High Frequency Field In Focal Region Using Maslov's Method

Author(s)

Abdul Ghaffar

Institute/University/Department Details
Department of Electronics / Quaid-i-Azam University, Islamabad
Session
2009
Subject
Electronics
Number of Pages
124
Keywords (Extracted from title, table of contents and abstract of thesis)
Frequency, Inhomogeneous, Uniaxial, Dimensional, Focal, Maslovs, Method, Krichhofs, Integral, Debye

Abstract
Maslov's method has been used to derive high frequency Żeld expression for difer- ent focusing systems. Derived high frequency Żeld expression is valid around the focal region of focusing systems. Both re°ection and transmission based focusing geometries are considered for discussion. Three dimensional Cassegrain and Gregorian systems are considered reaction problems. Hyperbolic lens, hyperboliodal lens, plano-convex lens, inhomogeneous slab and its three dimensional version, that is Wood lens are con- sidered as transmission problems. It is assumed that each focusing system is placed in isotropic, homogeneous medium and observed their focused Żeld around the focal region. Next it is consider that transmitted Żelds from inhomogeneous slab, Wood lens and plano-convex lens are focused into negative uniaxial crystal. The numerical results for focused Żelds inside negative uniaxial crystal with several diferent orientations of the optical axis in the plane of incidence are obtained.
Maslov's method is a systematic procedure for predicting the Żeld in the caus- tic region. It combines the simplicity of ray theory and generality of the transform method and provides remedy of geometrical optics which fails at caustic. Geomet- rical optics Żeld may be recovered from the high frequency Żeld expression, derived using Maslov's method, for observation points away from the caustic. Field patterns obtained using Malov's method are compared with those obtained using equivalent current distribution method, Huygens Krichhof's integral, and Debye Wolf focusing integral and comparisons are found to be in good agreement.

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S. No. Chapter Title of the Chapters Page Size (KB)
1 0 CONTENTS
 

 

vi
43 KB
3 1 INTRODUCTION

1.1 Geometrical Optics Field
1.2 Maslov's Method

1
192 KB
3 2 ANALYSIS OF FIELD OF THREE DIMENSIONAL REFLECTOR


2.1 Paraboloidal Reaector
2.2 Three Dimensional Cassegrain System
2.3 Three Dimensional Gregorian System

16
315 KB
4 3 ANALYSIS OF FIELD OF HYPERBOLIC AND HYPERBOLOIDAL LENS

3.1 Hyperbolic Lens
3.2 Hyperboloidal Lens Antenna
 

44
212 KB
5 4 ANALYSIS OF FIELD FOCUSED BY AN INHOMOGENEOUS SLAB INTO ISOTROPIC AND UNIAXIAL CRYSTAL

4.1 Inhomogeneous Slab
4.2 Focusing of Slab into Uniaxial Crystal

62
420 KB
6 5 FIELD FOCUSED BY WOOD LENS AND PLANO-CONVEX LENS INTO A UNIAXIAL CRYSTAL

5.1 Wood Lens
5.2 Plano-Convex Lens

80
404 KB
7 6 REFERENCES AND APPENDIX

 

100
141 KB