Title :
Numerical modeling of ultrawide-band dielectric horn antennas using FDTD
Author :
Venkatarayalu, Neelakantam V. ; Chen, Chi-Chih ; Teixeira, Fernando L. ; Lee, Robert
Author_Institution :
Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA
fDate :
5/1/2004 12:00:00 AM
Abstract :
A detailed characterization of the input impedance of ultrawide-band (UWB) dielectric horn antennas is presented using the finite-difference time-domain (FDTD) technique. The FDTD model is first validated by computing the characteristic impedance of two conical plate transmission lines (including planar bow-tie antennas) and comparing the results to analytical solutions. The FDTD model is next used to calculate the surge impedance of dielectric horn antennas using the conical plates as launchers. Design curves of the surge impedance for different choices of geometries and dielectric loadings are provided. The modeled antennas are particularly attractive for applications such as UWB ground penetrating radars (GPR) applications.
Keywords :
broadband antennas; conical antennas; electric impedance; finite difference time-domain analysis; ground penetrating radar; horn antennas; radar antennas; transmission lines; FDTD; UWB ground penetrating radars; conical plate transmission lines; dielectric loadings; finite-difference time-domain technique; input impedance; numerical modeling; planar bow-tie antennas; surge impedance; ultrawide-band dielectric horn antennas; Dielectrics; Finite difference methods; Ground penetrating radar; Horn antennas; Impedance; Numerical models; Planar transmission lines; Surges; Time domain analysis; Ultra wideband antennas; Dielectric horn antenna; FDTD; impedance;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.827510
