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FDTD calculation of radiation patterns, impedance, and gain for a monopole antenna on a conducting box

1992; IEEE Antennas & Propagation Society; Volume: 40; Issue: 12 Linguagem: Inglês

10.1109/8.204752

1558-2221

R. Luebbers, L. Chen, Toru Uno, S. Adachi,

Electromagnetic Scattering and Analysis

The ability of the finite-difference-time-domain (FDTD) method to calculate radiation patterns, input impedance, and gain for a monopole antenna on a conducting box is demonstrated. Results are given for the bare box and with the box coated with a dielectric layer. Radiation patterns are compared with measurements and with the method of moments for the bare box. Radiation patterns for the dielectric-covered box and all impedance and gain results are compared with measurements only. Good agreement is obtained in all cases. The FDTD approach includes a dielectric covering quite easily, while this would be quite difficult for a method of moments approach. The FDTD method requires similar computer time as the method of moments for a single-frequency result, but produces wide-bandwidth impedance and gain results with much less computer time. >