Electromagnetic radiation of printed circuit board and electrical contacts

Hiroshi Inoue; Yoshiki Kayano

Electromagnetic radiation of printed circuit board and electrical contacts

Hiroshi Inoue, Yoshiki Kayano

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Research results on the radiation of MHz to GHz frequency band from 1) a printed circuit board (PCB) and 2) slowly breaking contact (SBC) are discussed as examples of Electromagnetic Compatibility (EMC) and reliability problem for electronic systems.

In first part, numerical and experimental results of the common and differential mode radiations from a sample PCB are described. The calculation has been done by the finite difference time domain (FDTD) method using super computer. The typical size of a sample PCB under test is 150mm length, 100mm width and 1.53mm thickness made by FR4 material. A model of signal line is microstrip line with 2.8mm width which is matched for 50 ohm characteristic impedance. The results show connection of the PCB and line is important source of the undesired electromagnetic noise.

In second part, experimental results of electromagnetic noise from the breaking switch measured by the current probe and in anechoic chamber are described. The opening speed of the contact is about 100 micron meter per second, the current is 4.5 A, 36 V and the material of the electrodes are mainly silver. It is newly revealed that slowly opening contacts generate very high electromagnetic current and radiation noise more than 1 GHz.

Original language	English
Title of host publication	ICREPEC 2007 - Proceedings of the 2nd International Conference on Reliability of Electrical Products and Electrical Contacts
Publisher	China Science and Technology Press
Pages	172-177
Number of pages	6
ISBN (Electronic)	9787504646293
Publication status	Published - 2007 Jan 1
Event	2nd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2007 - Xiamen Duration: 2007 Mar 28 → 2007 Mar 31

Other

Other	2nd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2007
City	Xiamen
Period	07/3/28 → 07/3/31

Keywords

Contacts
EMC
Giga hertz frequency
Noise
Printed circuit board
Undesired electromagnetic radiation

ASJC Scopus subject areas

Safety, Risk, Reliability and Quality
Electrical and Electronic Engineering

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Electromagnetic radiation of printed circuit board and electrical contacts. / Inoue, Hiroshi; Kayano, Yoshiki.

ICREPEC 2007 - Proceedings of the 2nd International Conference on Reliability of Electrical Products and Electrical Contacts. China Science and Technology Press, 2007. p. 172-177.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Inoue, H & Kayano, Y 2007, Electromagnetic radiation of printed circuit board and electrical contacts. in ICREPEC 2007 - Proceedings of the 2nd International Conference on Reliability of Electrical Products and Electrical Contacts. China Science and Technology Press, pp. 172-177, 2nd International Conference on Reliability of Electrical Products and Electrical Contacts, ICREPEC 2007, Xiamen, 07/3/28.

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author = "Hiroshi Inoue and Yoshiki Kayano",

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AB - Research results on the radiation of MHz to GHz frequency band from 1) a printed circuit board (PCB) and 2) slowly breaking contact (SBC) are discussed as examples of Electromagnetic Compatibility (EMC) and reliability problem for electronic systems.In first part, numerical and experimental results of the common and differential mode radiations from a sample PCB are described. The calculation has been done by the finite difference time domain (FDTD) method using super computer. The typical size of a sample PCB under test is 150mm length, 100mm width and 1.53mm thickness made by FR4 material. A model of signal line is microstrip line with 2.8mm width which is matched for 50 ohm characteristic impedance. The results show connection of the PCB and line is important source of the undesired electromagnetic noise.In second part, experimental results of electromagnetic noise from the breaking switch measured by the current probe and in anechoic chamber are described. The opening speed of the contact is about 100 micron meter per second, the current is 4.5 A, 36 V and the material of the electrodes are mainly silver. It is newly revealed that slowly opening contacts generate very high electromagnetic current and radiation noise more than 1 GHz.

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KW - Noise

KW - Printed circuit board

KW - Undesired electromagnetic radiation

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Electromagnetic radiation of printed circuit board and electrical contacts

Abstract

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Keywords

ASJC Scopus subject areas

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