A practical approach to teaching the propagation of electromagnetic interference in printed circuit boards

2016 ◽  
Author(s):  
Luis C. M. Schlichting ◽  
Muriel B. de Liz ◽  
Golberi de S. Ferreira ◽  
Gustavo R. Alves ◽  
Carlos Felgueiras
Keyword(s):  
Electromagnetic Interference ◽  
Printed Circuit Boards ◽  
Practical Approach ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Approach To Teaching

scholarly journals The Analysis of Shielding Effectiveness of the enclosure of an EMI-Filter for a Spacecraft Power Bus

2021 ◽  
Vol 15 ◽  
pp. 470-475
Author(s):  
Yevgeniy Zhechev ◽  
Alexander Zabolotsky
Keyword(s):  
Electromagnetic Interference ◽  
Printed Circuit Boards ◽  
Circuit Boards ◽  
Shielding Effectiveness ◽  
Frequency Range ◽  
Dynamic Approach ◽  
Printed Circuit ◽  
Power Bus ◽  
Protection Devices ◽  
Emi Filter

In this paper, the shielding enclosure of an electromagnetic interference (EMI-) filter for a spacecraft power bus was analysed for shielding effectiveness (SE). By using an electro- dynamic approach, the authors conducted simulation in the frequency domain taking into account losses in the shield. The investigation covered the performance of the shielding enclosure with and without the connected cables and the in uence of apertures formed between the enclosurebase and its cover. It was found that the smallest value of the SE of the enclosure is observed for the configuration with unshielded cables. However, whilst maintaining shielding integrity, attenuation of at least 88 dB in the frequency range from 0 to 20 GHz was achieved. In the study, the authors analysed the in uence of printed circuit boards of EMI-filter in the shielded volume on SE of the enclosure and found that they have a weak effect on the SE. In conclusion, there is some practical guidance on the design of similar EMI-protection devices.

scholarly journals Electromagnetic interference in a multiconductor transmission system – MTL

2019 ◽  
Vol XXII (2) ◽  
pp. 343-351
Author(s):  
Ciocioi I.
Keyword(s):  
Transmission Lines ◽  
Electromagnetic Interference ◽  
Printed Circuit Boards ◽  
Electronic Circuit ◽  
Electromagnetic Coupling ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Different Types ◽  
Correct Function ◽  
Coupling Phenomena

In electrical and electronic practice, many connection and transmission elements (cables) are used as a multi-conductor transmission lines (MTL). The electromagnetic fields existing in the environment of these multiconductor transmission lines and can generate different types of coupling phenomena, causing EMC problems by the appearance of the unwanted EMI, disturbing the correct function and altering the information. Electromagnetic coupling between the circuits/cables of a circuit (also known as crosstalk) can also occur between the signal and power paths of an assembly made on printed circuit boards, PCB (printed board circuit), so it is important that when designing such an electrical / electronic circuit, these aspects should be taken into account.

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