Corrected impulse invariance method in Z-transform theory for frequency-dependent FDTD methods

• Main Authors: Heh, Ding Yu, Tan, Eng Leong
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Electrical and electronic engineering; Belevitch Theorem; Contour Integration
• Online Access: https://hdl.handle.net/10356/137115
• Institution: Nanyang Technological University

The classical impulse invariance method in Z-transform theory is found to be incorrect and inaccurate when the impulse response is discontinuous at intial time t = 0. Such inaccuracy results in higher numerical errors if it is used to develop the update equations for frequency-dependent finite-diffe...