Finite-difference time-domain method for antenna radiation

Author

Tirkas, Panayiotis A. ; Balanis, Constantine A.

Author_Institution

Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA

Volume

40

Issue

3

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

334

Lastpage

340

Abstract

The finite-difference time-domain (FDTD) method is used to model and predict the radiation patterns of wire and aperture antennas of three basic configurations. A critical step in each is the modeling of the feed. Alternate suggestions are made and some are implemented. The first antenna is a quarter-wavelength monopole and the second is a waveguide aperture antenna. In both bases the antenna is mounted on ground planes, either perfectly conducting or of composite material. The results obtained using the FDTD technique are compared with results obtained using the geometrical theory of diffraction (GTD) and measurements. The third configuration of interest is a pyramidal horn antenna. To model the flared parts of the horn, a staircase approximation was applied to the antenna surface. The computed radiation patterns compared well with measurements

Keywords

antenna feeders; antenna radiation patterns; difference equations; time-domain analysis; waveguide antennas; FDTD technique; GTD; antenna radiation; aperture antennas; feed modelling; finite-difference time-domain; geometrical theory of diffraction; pyramidal horn antenna; quarter-wavelength monopole; radiation patterns; staircase approximation; waveguide aperture antenna; wire antennas; Antenna measurements; Antenna radiation patterns; Aperture antennas; Composite materials; Feeds; Finite difference methods; Horn antennas; Predictive models; Time domain analysis; Wire;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.135478

Filename

135478