Development Of 3D Finite-Difference Time-Domain (FDTD) Algorithm In Matlab For Dielectric Resonator Antenna Radiation Study

Mohd Shahril, Abdul Razak (2013) Development Of 3D Finite-Difference Time-Domain (FDTD) Algorithm In Matlab For Dielectric Resonator Antenna Radiation Study. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Ever since the development of computer in analyzing electromagnetic problem, it makes antenna study easier to accomplish. Today, the theoretical analysis in solving electromagnetic problems leads to the development of many different computational algorithms that also include FDTD. The Finite-Difference Time-Domain (FDTD) technique implements finite-difference approximations of Maxwell's equations in a discretized volume that permit accurate computation for the radiated field of Dielectric Resonator Antenna (DRA). In this thesis a brief introduction of the procedure for applying FDTD method to time-domain Maxwell equations is shown especially in the Yee’s algorithm that apply finite central approximation to obtain the equations. The starting point for the FDTD to simulate a structure begins with the constant value of permittivity, permeability, electric conductivity and magnetic conductivity of the material which produce electric and magnetic field on each Yee cells. This can be done by incorporating many important techniques in FDTD to develop a precise simulation of the DRA parameter in 3D such as Absorbing Boundary Conditions (ABCs) and Near-Field to Far-Field (NFFF) transforms. The result will illustrate in form of scattering parameter and radiation pattern in plane cut that consists of xy-plane, xz-plane and yz-plane. Then, the FDTD data generated from 3D models are compared with commercial software like CST and HFSS to verify the output data. Normally, prices of electromagnetic software packages especially antenna is quite expensive and license per year basis. Finally, this project also relevant and parallels with the latest technology in antenna design.

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