Title :
A step size effect of the FD-TD method on a linear array antenna study
Author :
Qi, Z. ; Choi, D.
Author_Institution :
Fac. of Eng., Regina Univ., Sask., Canada
Abstract :
It is well known that the finite-difference-time-domain (FDTD) algorithm exhibits numerical errors caused by dispersion when wave propagation is simulated. A simple algorithm which will reduce this dispersion error is proposed to improve the accuracy of the FDTD method in an application of linear antenna analysis. This procedure also automatically reduces errors caused by the stepwise positioning of the output data locations for the study of far-field radiation patterns. The improved result from the proposed scheme is clearly shown for examples of linear antennas with the length of half wavelength and/or a multiple of that length. Further results for several array-type antennas are presented, and a robust agreement with theory is noted.<>
Keywords :
antenna arrays; antenna radiation patterns; antenna theory; difference equations; electromagnetic wave propagation; error analysis; time-domain analysis; FDTD method; antenna analysis; dispersion error; electromagnetic propagation simulation; far-field radiation patterns; finite-difference-time-domain; linear array antenna; numerical errors; output data locations; step size effect; stepwise positioning; Algorithm design and analysis; Antenna arrays; Antenna radiation patterns; Antennas and propagation; Boundary conditions; Dipole antennas; Electromagnetic scattering; Error correction; Finite difference methods; Linear antenna arrays;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.174866
