Dissertation > Excellent graduate degree dissertation topics show

The complex structure of the scattering and radiation characteristic basis function method and improved technology

Author: LuWenChun
Tutor: HuJun
School: University of Electronic Science and Technology
Course: Electromagnetic Field and Microwave Technology
Keywords: Integral equation Method of Moments Characteristic basis function method Multilevel fast multipole method Array structure
CLC: O441.4
Type: Master's thesis
Year: 2011
Downloads: 39
Quote: 0
Read: Download Dissertation


Electromagnetic characteristics of large complex target analysis in a wide range of applications in engineering, people have been very enthusiastic about the development of a more efficient and accurate algorithm. Method of moments as accurate numerical algorithms, one for decades has been widely used, it has the advantages of high accuracy, but its calculation complexity and memory consumption is high, it is difficult to be applied directly to complex electrically large electromagnetic properties analysis. Developed on the basis of the method of moments, multilevel fast multipole method (MLFMA) adaptive integral method (AIM) method greatly reduces the computational complexity and memory requirements matrix-vector multiplication problem can quickly solve large object , but must rely on the iterative solution method. For multi-incident problem, the iterative process is still time consuming. This study characteristic basis function method can significantly reduce the number of unknown quantities, the method is particularly suitable for the electromagnetic properties of the periodic array structure analysis. This paper first introduces the thinking step of the method of integral equations, and solving method - the principle of the method of moments and solving process details. Then-depth study of the characteristic basis function method, and the method is extended zone width selected, the singular value decomposition (SVD) threshold determined parameters were analyzed. Plane wave excitation distribution and to establish the characteristics of the base function is optimized. Then, the characteristic basis function algorithm. By introducing a fast multi-pole multilevel fast multipole method of accelerated filling the impedance matrix filling characteristic basis functions belonging to different blocks to improve the traditional method of matrix filling speed. And adaptive cross approximation method to approximate calculation the extended blocks impedance matrix, improve the speed to establish the characteristics of the base function. Second, the characteristic basis function method and fast multipole - fast Fourier transform method combined for the analysis of large-scale electromagnetic properties of planar array structure. Study design characteristic basis function method, the number of unknown quantities before and after the combination of the characteristic basis function method, the iteration time compared and carried out a detailed analysis of its causes. Finally, for large planar array structure characteristic basis function method to establish the characteristics of the base functions process improvement, and the development of a model characteristic basis function method, the method uses two layers characteristic basis function, to further reduce the number of unknown quantities last applicable conditions and effects analysis.

Related Dissertations

  1. Adjustable composite element frequency selective surface design,TN713
  2. Astudy on Hierarchical-Matrix-Based Algorithm for Solving Electromagnetic Problems of the Volume Integral Equation,O175.5
  3. Astudy on Hierarchical-matrix-based Algorithm for Solving Electromagnetic Scattering from Conducting Bodies,O441
  4. Composite basis functions and generalized transmission matrix online electromagnetic radiation characteristics of the antenna surface structure research applications,O441
  5. Small aperture glass-ceramics based on helium-neon laser fundamental transverse mode selected experimental study,TN248
  6. A356 Alloy Micro thixoforming its mechanism of ultrasonic vibration assisted,TG249.9
  7. The airborne radar RCS algorithm with the software implementation,TN959.73
  8. Financial liberalization is to study the role of financing constraints,F272;F224
  9. A Research of the Underground Electromagnetic Field in Three-dimensional Inclined Geological Body,P631.325
  10. Wavelet moment method for solving electromagnetic scattering problems in applied research,O441
  11. Characteristic Basis Function Method Based on Singular Value Decomposition and Its Applications in Electromagnetic Scattering Problem,O441.4
  12. On the Risk Models with Tax,F812.42
  13. An Analysis of Electromagnetic Scattering Characteristics of Dielectric Objects by Method of Moments,TM15
  14. Types of nonlinear problems is understanding and application,O175.8
  15. Prediction Model of Electromagnetic Fields of Extra High Voltage Transmission Lines,TM723
  16. The Spectral Domain Method of Multilayered Media and Its Analysis for Microstrip Antenna,TN822
  17. A Study on Hierarchical-matrix-based Fast Algorithm for Solving Electromagnetic Problems,O441.4
  18. High Precision and High Efficiency Numerical Calculation Research Based on Magnetic Field Integral Equation,O441.4
  19. Study on Fast Computation of Impedance Matrix of Method of Moments,O441.4
  20. The Study of Key Technology for Fast Calculation of Wide-band RCS for Electrically Large Conductor Target,TN011
  21. Terminal Perturbation Methods for Backward Stochastic Volterra Integral Equations,O211.63

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