scholarly journals Electromagnetic interference filter for spacecraft power bus

Author(s):  
Y S Zhechev ◽  
V P Kosteletskii ◽  
A M Zabolotsky ◽  
T R Gazizov
Author(s):  
Idrissa Abubakar ◽  
Jafri Din ◽  
Manhal Alhilali ◽  
Hong Yin Lam

<p>5G wireless network technology is going operate within the environment of other electrical, electronic and electromagnetic devices, components and systems, with capability of high speed data connectivity acting as network transceiver stations with Massive MIMO for Internet of Things (IoT). Considering the level of interoperability, electromagnetic Interference and electromagnetic compatibility to avoid electromagnetic pulse effects (EMP) which is capable of not only causing network malfunctions but total devices and equipments failure in mission critical operations, like hospital MRI scan machines, security profiling and data handling or even personal healthcare devices like heart pacemaker. Electromagnetic energy coupling in PCB due to: radiation, reflection and Crosstalk generates reliability challenges affecting Signal Integrity between traces of multilayer boards stalks, power bus and packaging creating Electromagnetic interference (EMI) in PCB leading false clock response to system failure. Above were considered very essential when deploying 5G wireless network facility as presented in this paper. </p>


Author(s):  
Yevgeniy Zhechev ◽  
Alexander Zabolotsky

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.


2018 ◽  
Vol 19 (12) ◽  
pp. 697-700
Author(s):  
Patryk Wetoszka

The article presents the study of conducted disturbance emission, which was subjected to the alarm control panel on the (+, -) 24V DC power supply ports and the method of elimination of electromagnetic interferences. The measurements were carried out in an accredited testing laboratory on a measurement stand with a standardized configuration of equipment in accordance with the applicable standards in the field of electromagnetic compatibility. During the measurements, exceedances of the limit value at the power terminals were observed. Appropriate steps have been taken to reduce the interference levels by using an appropriate anti-interference filter inside the control panel. Installing the filter in accordance with the manufacturer's instructions allowed to obtain the expected results. The article presents the effects of research in the form of electro-magnetic characteristics of conductive disturbances as a function of frequencies recorded on the measuring device.


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