| Nowadays, high frequency telecommunication and electronic markets are growing. Because wavelengths of high frequency signals can be comparable and even considerably shorter than sizes of electronic circuit structures, effects of electromagnetic fields need to be considered for better design accuracy, while such effects are usually ignored in conventional circuit simulations. Electromagnetic (EM) simulations by numerical techniques allow EM effects to be fully computed since they solve the EM governing equations, Maxwell's equations, directly.;This thesis presents a diakoptic method and a new hybrid node for the FD-TLM method. The diakoptic method allows a structure to be decomposed into several sub-domains which can then be simulated and stored separately. As a result, a structure of large dimensions, which is of practical values, can be computed with limited computer resources. The proposed new hybrid node reduces memory requirement for computing each TLM node and therefore also improve computational speed. By combining proposed diakoptic method and the hybrid node, efficiency and effectiveness of the TLM are further enhanced. Numerical examples are provided to verify the claims.;There is a variety of EM numerical techniques. The Frequency Domain Transmission Line Matrix (FD-TLM) numerical method is one of the typical EM numerical methods [1] that is effective and efficient for narrow-band modeling and simulation. |
