Transient Scattering from Simple Wire Objects in the Time Domain

Student: Wei-Meng Ong

Supervisor: Nick Shuley

Category: Engineering Thesis Project - Signal Processing

The overall objective of this thesis work is to develop a time domain electromagnetic program, so as to compute and display the scattered electromagnetic field of arbitrary wire structures. The thesis consists of two milestones. The first milestone, which is the main focus of the entire work, is to compute the current induced on the wire structure. The second milestone is to compute the far scattered field. The algorithm for the program is based on Sadasiva M. Rao Time Domain Integral Equation (TDIE), which is arranged as a Marching On in Time (MOT) equation.

The derivation of the TDIE, which can be divided into two main modules, is been analysed and presented. The two modules are the induced current calculation and the far scattered field calculation. In this thesis work, the module on the calculation of the current induced on the wire structures is analysed and presented. Issues such as the geometry of the wire structures, calculation of vector and scalar potential and the solutions for the integral equation for both the self-term and non-self term are discussed.

The algorithm to compute the induced current is designed and implemented using MATLABŪ. Two wire structures; straight and L wire structures are used to test the performance and accuracy of the code. Both the wire structures are been analysed and the simulation results, in time domain, are compared with published results to verify the accuracy of the program.

Thesis Document (PDF)

Poster Presentation (PDF)