Dissertation > Excellent graduate degree dissertation topics show

Analysis of the Electromagnetic Scattering Characteristic of Frequency Selective Surfaces

Author: LiuChao
Tutor: WangXiaoMing
School: Dalian University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Key Words Frequency Selective Surfaces (FSS) Method of Moment (MoM) Spectral Method Scattering Matrix Periodic Structures
CLC: O441.4
Type: Master's thesis
Year: 2010
Downloads: 270
Quote: 0
Read: Download Dissertation

Abstract


Frequency Selective Surfaces (FSS) are structures which comprise periodic arrays of patches or apertures. The periodic structures can control the transmission and reflection of the electromagnetic wave. For incident electromagnetic waves of different frequencies and angles, they show different scattering characteristic. The periodic structures exhibit total transmission or total reflection for an incident wave in the resonance frequency.The method of moment (MoM) is a method of good accuracy and steadiness, which is suitable for solving problems of scattering and radiation. Because the shape of patch or aperture could be described by matrix when using MoM, arbitrary shapes of FSS can be calculated.In this thesis, the scattering characteristic of the FSS is discussed using the spectral method. For an infinite FSS, the problem is reduced to one cell by Floquet theorem. Then the operator equation is built with the help of Green function. After that, the equation is turned to the spectral domain using Fourier transform. The solution of the equation is gotten employing the method of moment, and the induced current could be found with the solution. Then the fields are divided into the Floquet harmonics of TE and TM polarization. The concept of the normalized voltage is given, and the scattering parameters of the harmonics are available, thus, the scattering matrices are obtained. For the multilayer structures, the composite scattering matrix is gotten by combining the scattering matrices of the elements.The program for analyzing the scattering characteristic of FSS is written using this technique, and several examples are given. The characteristic of FSS with single screen and double screens are calculated respectively, and factors influencing the characteristic of FSS are analyzed, the advantages of double screens are also demonstrated.

Related Dissertations

  1. Spectral Method for Solving Two Types of Delay Differential Equations,O241.8
  2. One -dimensional gradient index medium spectral radiative transfer equation method for solving,TK124
  3. Spectral Method for One-Dimensional Radiative Transfer Equation,TK124
  4. Preparation of EVA/LDH Composites and Study on Their Structure and Properties,TB383.1
  5. Electromagnetic scattering and RCS Calculation of jet engine inlet,V233.75
  6. The Eigenvalue Problem with a Piecewise Constant Coefficient Using Spectral Method,O241.82
  7. Mathematical Methods in geophysical exploration,O242.1
  8. Preliminary Study on Energy Threshold and Accumulation Effect in Sps Induced by Femtosecond Laser Pulses,TN241
  9. Trajectory Optimization Design for Global Rapid Reachable Vehicle,V412.41
  10. The numerical solution of equations of a compressible Heisenberg chain,O241.8
  11. Rapid Trajectory Optimization for Flight Vehicles with Complex Constraints,V249
  12. PPC Performance and Empirical Analysis,F49
  13. High-end local amendments Nystrom method and its application in electromagnetic scattering problems,TN011
  14. Bifurcation Analysis and Computation of Several Nonlinear Problems,O415
  15. Co-rotating vortex pair fusion research,O35
  16. Analysis of the Polarization Properties of Targets in Snow Clutter,TN957.5
  17. A Legendre Galerkin Spectral Method for Optimal Control Problem Governed by Stokes Equations,O232
  18. Semilinear Wave Equations long time behavior of spectral methods,O175.2
  19. Analysis of Complex Waveguide Discontinuities Based on Mode Matching Method,TN814
  20. The Fourier Spectral Method for Solving Two-dimensional Elliptic Partial Differential Equations with Dirichlet Boundary Condition,O175.25
  21. Based on MDA-SVD fast direct method -CBD,TP301.6

CLC: > Mathematical sciences and chemical > Physics > Electromagnetics,electrodynamics > Electricity and Magnetism > Electromagnetic waves and electromagnetic fields
© 2012 www.DissertationTopic.Net  Mobile