Title :
Numerical and Experimental Impedance Analyses of a Thin-Wire Antenna in the Presence of a High-Permittivity 3D Dielectric Body
Author :
Saeedfar, Amin ; Sato, Hiroyasu ; Sawaya, Kunio
Author_Institution :
Dept. of Electr. & Commun. Eng., Tohoku Univ.
Abstract :
Numerical and experimental analyses of dipole impedance in the presence of 3D dielectric body was carried out. For the numerical computations, the mixed-domain method-of-moments (MoM) using polynomial expansion and finite-difference time-domain (FDTD) method were applied. Accuracy of the previously proposed MoM for high-permittivity material was substantiated by comparison between the numerical solutions of FDTD and also by comparing the numerical results with some experimental data. It was observed that in low temperature case, when the water has higher permittivity and conductivity indexes, numerical results of MoM have better agreement with experimental data than that of FDTD results. This happens in the case of very small distance between antenna and scatterer, too. More improvement of proposed MoM is required and under investigation
Keywords :
dielectric bodies; dipole antennas; electromagnetic fields; finite difference time-domain analysis; method of moments; permittivity; polynomials; wire antennas; FDTD method; MoM; dipole impedance; finite-difference time-domain method; high-permittivity 3D dielectric body; impedance analyses; mixed-domain method-of-moments; polynomial expansion; thin-wire antenna; Conducting materials; Dielectric materials; Dipole antennas; Finite difference methods; Impedance; Moment methods; Permittivity; Polynomials; Temperature; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium 2006, IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
1-4244-0123-2
DOI :
10.1109/APS.2006.1711518
