Dissertation > Excellent graduate degree dissertation topics show

Analysis of electromagnetic scattering from complex target rotationally symmetric body

Author: HuHengTai
Tutor: ShaZuo; ChenRuShan
School: Nanjing University of Technology and Engineering
Course: Electromagnetic Field and Microwave Technology
Keywords: Method of Moment Body of revolution Thin materials Adaptive crossoverApproximation algorithm
CLC: TN011
Type: Master's thesis
Year: 2013
Downloads: 32
Quote: 0
Read: Download Dissertation

Abstract


With the rapid development of computers and the urgent need of national defense, there is a big development in the computational electromagnetic. In civilian or military application, more and more researches for electromagnetic scattering by thin materials are paid attention, especially in the aeronautics and astronautics industries.Firstly, this work presents a technique for evaluating singular integrals in the solution of electromagnetic scattering by the bodies of revolution (BoR) using the method of moments (MoM). In this thesis, the singular part of the kernels is transformed to an elliptic integral, which is calculated by a closed form or replaced by an accuracy approximation based on the arithmetic geometric mean. What is more, the scattering characteristics of dielectric antenna radome of revolution are discussed.Secondly, the electromagnetic scattering by conductor-backed thin materials is analyzed. The polarization current and charge are expressed in terms of the surface induced current on the conductor surfaces, so there is only one unknown in the integral. Compared to the surface integral equation approach and traditional BOR, there are less unknowns in this method which saves time and memory consumption. A series of numerical examples are presented to demonstrate this approach accuracy and efficiency, and it can be seen that this method is better than traditional methods.At last, the adaptive crossover approximation (ACA) algorithm is combined with the PMCHW. The sub-matrixes can be compressed utilizing the low rank of the coupling matrix blocks in the ACA algorithm. Due to the low rank character, the sub-matrixes in the far field can be decomposed by picking out rows and columns with the same number as the rank. As a result, the memory and the time can be saved greatly.

Related Dissertations

  1. A Study on the Fast Degenerated Kemel Algorithm for Solving Magnetic Field Integral Equation from Conducting Bodies,O441.4
  2. Calculation of Green’s Functions in Planar Stratified Structures and It’s Applications for Analysis of Microstrip Structures,O175.5
  3. Modeling and Simulation of Carbon Nanotube Bundle Antennas,TB383.1
  4. Analysis and Design of Self-Structuring Antennas,TN821.3
  5. Study on Simulation of Electromagnetic Fields Caused by Extra High Voltage Transmission Lines,TM75
  6. The goal edge scattering algorithm and its application research,TN011
  7. Scattering characteristics based on the method of moments large target local irradiation,TN957.5
  8. The Analysis and Research on Electromagnetic Scattering of Complex Target,TN951
  9. Electromagnetic Scattering of Electrically Large Dielectric-Coated Cavities with Complex Terminations,TN951
  10. Smart Antenna Array Analysis and Implementation,TN821.91
  11. Research on Sub-Entire Domain Basis Function Method and Its Application,O411
  12. Fast Electromagnetic Simulation of Microstrip Circuits and Antenna Arrays,TM159
  13. Fast Algorithms for Electromagnetic Scattering Analyses,TN951
  14. GPU-Based Accelerated MOM for Electromagnetic Scattering Simulations,O441.4
  15. Reliability-based Sensitivity and Robust Design of Aero-engine Turbine Disk with Arbitrary Distribution Parameters,V232.3
  16. The Design of Ultra-wideband Reconfigurable Antenna,TN822
  17. Study on statistical characteristics of SAS image of the multi-path interference,TN957.52
  18. Investigation of the Composite Scattering from 1D Rough Surface and Object by the Method of Moment and Its Fast Algorithms,TN011
  19. Analysis of the Electromagnetic Scattering Characteristic of Frequency Selective Surfaces,O441.4
  20. The Analysis of Microstrip Antenna Considering the Mutual Coupling and Compensation,TN822

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