Dissertation > Excellent graduate degree dissertation topics show

Researches on Mechanism of SLF and ELF Wave Propagation in an Anisotropic Earth-Ionosphere Cavity

Author: LiGuoZheng
Tutor: LiKai
School: Zhejiang University
Course: Electromagnetic Field and Microwave Technology
Keywords: SLF ~ ELF Anisotropic Earth - ionosphere Horizontal electric dipole Reciprocity theorem
CLC: TN011.2
Type: Master's thesis
Year: 2012
Downloads: 36
Quote: 0
Read: Download Dissertation

Abstract


In recent years, due to the shallow seismic , geological strata probing , in-depth study of its submarine navigation and communication technology , the need to learn more about the ultra-low frequency band of radio wave propagation characteristics of extremely low frequency (SLF-ELF) ELF band depth learning , in-depth study of very low frequency radio wave propagation characteristics have significant meaning . This article discussed the extremely low frequency electromagnetic waves corresponding communication theory . Briefly retell the work of their predecessors , given a vertical electric dipole in the earth and ionosphere are ideal isotropic , vertical magnetic dipole and horizontal electric dipole generated electromagnetic field expression derivation . Ultra-low frequency band of extremely low frequency (SLF-ELF) electromagnetic wave frequency is very low , under the influence of Earth's magnetic field , ionosphere the SLF-ELF wave will reflect the anisotropic characteristics . Article further theoretical analysis of the anisotropic characteristics of the ionosphere on the reflective properties of the ionosphere under the influence of the Earth's magnetic field and the impedance matrix . The innovation of this paper is that the original ground - isotropic ionosphere waveguide model improvements for the land affected by the Earth's magnetic field - anisotropic ionosphere model . Analytic expression derived in this non-ideal conditions of a vertical magnetic dipole component , and a similar approach is derived vertical electric dipole expression , reuse reciprocity theorem to derive a practical application more more horizontal electric dipole component of the expression . Finally , write a program simulation gives the example under typical conditions .

Related Dissertations

  1. Research on Methods of Medical Ultrasound Image Denoising,TP391.41
  2. Of speckle noise removal in medical ultrasound image,TP391.41
  3. Multi-wave Multi-component Seismic Data Processing Technology Study in Lamadian Oil Field of Northern Part of Daqing Placanticline,P631.4
  4. Anisotropic Analysis for Q3 Q4 Hermite Element of C1 Continuity,O241.82
  5. A1 doped ZnO thin films and laser-induced voltage effect,TB383.2
  6. Image edge detection based on mathematical morphology and wavelet transform research,TP391.41
  7. Transformation Optical Design of a Bending Waveguide by Use of Isotropic Materials,O431.1
  8. Image Filtering Based on Partial Differnetial Equations,TP391.41
  9. Deformation Anisotropy Study of Columnar Jointed Rock Masses,TU452
  10. The Theoretical Investigation of Geometric Phase, Entanglement and Quantum Phase Transition in Quantum Systems,O413.1
  11. Local Boundedness for Minima of Anisotropic Functionals and Solutions of Anisotropic Equations,O177
  12. The Regularization Method Research of Ultrasound Image Resolution Enhancement,TP391.41
  13. Nonrigid Registration of Medical Images Based on Anisotropic Structure Tensor and Joint Saliency Map,TP391.41
  14. Polarization Converter and Goos-H(?)nchen Shift in Double Metal-cladding Uniaxial Crystal Waveguide Structure,TN252
  15. LHM isotropic and anisotropic scattering properties of electromagnetic waves,O441.6
  16. FDTD method based Earth - ionosphere waveguide system ELF / VLF electromagnetic modeling and analysis,TN011.8
  17. Simulation and Fabrication of Refractive Micro-Structures Based on Wet KOH Etching Characteristics of Silicon,TP391.41
  18. Numerical Modeling of Laser Ultrasound in Unidirectional Fiber-Reinforced Composite Material Using Finite Element Method,TB332
  19. Heart model and simulation study of the inverse problem of ECG,R541.7
  20. Study for Mechanical Properties of Directional Plexiglas by Experiment and Numerical Simulation,TQ325.7

CLC: > Industrial Technology > Radio electronics, telecommunications technology > General issues > Basic theory > Radio wave propagation,the propagation mechanism > Ionospheric propagation
© 2012 www.DissertationTopic.Net  Mobile