International Symposium on Antennas and Propagation
Accurate Calculation of Input Power in the FDTD Algorithm
Wenhua Yu, Xiaoling Yang, Yongjun Liu, Raj Mittra, Yongquan Lu, Rui Lu,
PDF download (68.1KB)
In this communication, we investigate the conservation of power in the FDTD method when a system is excited by using either voltage or current sources. Though both the hard and soft sources can be employed to excite a system in the FDTD method, the soft source is more widely used than the hard one since the former one is more realistic in the practical applications. We have validated the conservation of power for both the loss and lossless systems in a commercial code that is based on the FDTD technique by using the approach outlined in this paper.