Title :
Finite-difference time-domain technique for antenna radiation
Author :
Tirkas, P.A. ; Balanis, C.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
The finite-difference time-domain (FD-TD) technique is used to predict the radiation pattern of antennas mounted on ground planes, either perfectly conducting or of composite material, and other complex structures. The results obtained using the FD-TD technique are compared with results using the geometrical theory of diffraction (GTD) and measurements. The normalized power pattern of a quarter-wavelength monopole on a square perfectly conducting ground plane is displayed. In addition, results obtained using a circular perfectly conducting ground plane are exhibited. The FD-TD method predicts extremely well, as does the GTD, the ring source contributions of the circular ground plane which reflect in higher intensity lobes near the axis of the system ( theta =0 and 180 degrees ) as compared to those of the straight-edge ground plane.<>
Keywords :
antenna earths; antenna radiation patterns; antennas; conductors (electric); difference equations; time-domain analysis; FD-TD; GTD; antenna radiation; circular ground plane; composite material; finite-difference time-domain; geometrical theory of diffraction; ground planes; measurements; normalized power pattern; perfectly conducting material; quarter-wavelength monopole; radiation pattern; ring source; straight-edge ground plane; Antenna measurements; Application software; Composite materials; Electromagnetic radiation; Electromagnetic scattering; Feeds; Finite difference methods; Integral equations; Time domain analysis; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115038
