Finite-difference time-domain model for the feeding gap of coaxial probe driven antennas
- Finite-difference time-domain model for the feeding gap of coaxial probe driven antennas
- 현승엽; 김세윤; 김영식
- FDTD; antenna; feed
- Issue Date
- IET microwaves, antennas & propagation.
- VOL 3, NO 3, 501-506
- In the finite-difference time-domain (FDTD) method, a simple and realistic feed model for coaxial probe
driven antennas is proposed here. The feed zone of the antenna may be considered as an equivalent source in
view of the antenna theory and a load port in view of the transmission line theory. The proposed feed model is
constructed by combining the infinitesimal-gap source condition of the antenna and the equivalent load condition
of the feed line. It leads to perform no additional FDTD cell modelling of the line. The transient reflected voltage
and the input impedance of cylindrical monopole antennas fed by coaxial lines are calculated numerically and
then compared with the accurate measurement and a full fine-grid. The FDTD results of the proposed model
have a good agreement with the measured data and the fine-grid results.
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