CEM: Time Domain Techniques
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With the rapid increase in performance of desktop computers it has become feasible for designers to apply computational electromagnetics to determine the electromagnetic behaviour of many systems without the need for supercomputing facilities. Examples range from enclosure shielding, emissions from heatsinks, propagation of electromagnetic energy into living tissue (eg. mobile phones, medical diathermy), antenna design, printed circuit board layout, connectors and cables. Supercomputers have been used to analyse the performance of modern aircraft such as the Eurofighter Typhoon, and complex measurement environments such as reverberation chambers.
The course aims to present the principles behind time-domain numerical electromagnetic codes and illustrate what they can and cannot do. A full set of demonstration software is provided.
Key subjects covered
- Time domain modelling of electromagnetic scattering
- Finite difference time domain (FDTD) and transmission line matrix (TLM) modelling of enclosures, antennas, and guided waves
- Examination of boundaries - wires, thin-layers (ferrite, CFC) and other macro-models used within finite methods
- Time domain integral equation based modelling of wire structures and antennas
- Post processing techniques including conversion from time domain to frequency domain will also be addressed.
Course scope
This module aims to give the delegate an appreciation of the uses and limitations of time domain computational techniques applied to EMC and RF problems. The module gives the delegate a thorough grounding in the methodology of these techniques from a fundamental standpoint, while giving a grasp of the practical applications. Simple problems are considered, in lectures and practical sessions, to give an understanding of how the choices made in designing the algorithms translate into the real strengths and limitations of the software. More complex EMC and RF antennas/structures and real EMC test environments are then examined to give an insight into current and potential uses.
Who should attend
Engineers involved in EMC design and testing, design of EMC test cells or enclosures, and EMC/RF antenna designers who wish to gain an appreciation of the role of modelling within those areas. Engineers currently using numerical modelling techniques who wish to gain a grounding in the theory, and update their knowledge of the topic.
Last Updated: 2012-Feb-03
