Calculation of Small Antennas Quality Factor Using FDTD Method

Author

Collardey, S. ; Sharaiha, A. ; Mahdjoubi, K.

Volume

5

Issue

1

fYear

2006

Firstpage

191

Lastpage

194

Abstract

The complexity in the evaluation of the radiation quality factor Q of small antenna lies in the calculation of the stored energy. Previous authors proposed several analytical expressions for simple antennas to obtain the Q, which is of practical importance because of its relationship to the antenna bandwidth. This letter presents a general numerical method to calculate the Q using finite-difference time-domain (FDTD) method giving us accurate results and can be applied to complex antennas. Examples of a linear dipole antenna, a loop antenna and an inverted L-shaped antenna along with their results are presented and compared to analytical results of the literature.

Keywords

Q-factor; antenna radiation patterns; dipole antennas; finite difference time-domain analysis; linear antennas; loop antennas; FDTD method; finite-difference time-domain method; inverted L-shaped antennas; linear dipole antennas; loop antennas; quality factor; small antennas; Antennas and propagation; Bandwidth; Dipole antennas; Finite difference methods; Helium; Impedance; Q factor; Resonance; Resonant frequency; Time domain analysis; Electrically small antennas; quality factor;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2006.873947

Filename

1632119