Predicting Shielding Effectiveness of Populated Enclosures Using Absorption Cross Section of PCBs

Sarah L Parker; Ian D Flintoft; Andy C Marvin; John F Dawson; Simon J Bale; Martin P Robinson; Ming Ye; Changyong Wan; Mengze Zhang

doi:10.1109/EMCEurope.2016.7739305

Predicting Shielding Effectiveness of Populated Enclosures Using Absorption Cross Section of PCBs

Sarah L Parker, Ian D Flintoft, Andy C Marvin, John F Dawson, Simon J Bale, Martin P Robinson, Ming Ye, Changyong Wan, Mengze Zhang

Electronic Engineering

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

Abstract

Shielding effectiveness (SE) is an important measure of how well an enclosure reduces the electromagnetic (EM) field incident upon it. Commonly, when the shielding effectiveness of an enclosure is stated it is for the case when the enclosure is empty. Including contents such as printed circuit boards (PCBs) in the enclosure will affect the shielding effectiveness as the PCB absorbs EM energy. One technique of determining how much energy a PCB absorbs is to measure its absorption cross section (ACS) using a reverberation chamber (RC). The measured ACS can be used to predict the shielding effectiveness of an enclosure when the PCB is inside it using power balance techniques. In this paper the ACS of a number of PCBs are measured both individually and in closely stacked groups. This information is then used to show how the ACS can be used to calculate shielding effectiveness and the results are compared to direct measurement of the SE of the enclosure containing a PCB. Knowledge of the ACS of typical or particular PCBs could be used by engineers to estimate the real shielding effectiveness of an enclosure with contents, when designing electronic systems.

Original language	English
Title of host publication	Electromagnetic Compatibility (EMC EUROPE), 2016 International Symposium on
Pages	324-328
DOIs	https://doi.org/10.1109/EMCEurope.2016.7739305
Publication status	Published - 5 Sept 2016
Event	EMC Europe 2016 - Wroclaw, Poland Duration: 5 Sept 2016 → 9 Sept 2016

Conference

Conference	EMC Europe 2016
Country/Territory	Poland
City	Wroclaw
Period	5/09/16 → 9/09/16

Bibliographical note

© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Keywords

Absorption cross section
electromagnetic shielding
reverberation chamber

Access to Document

10.1109/EMCEurope.2016.7739305

EMCE2016-Parker-324-postprint
© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Accepted author manuscript, 1.21 MBLicence: Unspecified

1 Industrial

HUAWEI Technologies Co., Ltd.
Flintoft, I. D. (Collaborator)
21 May 2016 → 28 May 2016
Activity: Visiting an external institution › Industrial

1 Finished
1 Active

Electromagnetic shielding properties of Materials, and Enclosures
Dawson, J. F. (Principal investigator), Marvin, A. (Principal investigator), Flintoft, I. D. (Principal investigator), Dawson, L. (Principal investigator), Porter, S. J. (Principal investigator), Robinson, M. P. (Principal investigator) & Yan, J. (Student)
1/01/90 → …
Project: Other project › Miscellaneous project
Shielding Measurement of Electrically Large Enclosures with Contents
Marvin, A. (Principal investigator), Dawson, J. F. (Co-investigator), Robinson, M. P. (Co-investigator), Bale, S. J. (Researcher), Flintoft, I. D. (Researcher), Parker, S. (Researcher) & Yan, J. (Student)
1/09/14 → 31/08/16
Project: Research project (funded) › Research

Cite this

@inproceedings{1346b898fe2342c985792f3256fd3dde,

title = "Predicting Shielding Effectiveness of Populated Enclosures Using Absorption Cross Section of PCBs",

abstract = "Shielding effectiveness (SE) is an important measure of how well an enclosure reduces the electromagnetic (EM) field incident upon it. Commonly, when the shielding effectiveness of an enclosure is stated it is for the case when the enclosure is empty. Including contents such as printed circuit boards (PCBs) in the enclosure will affect the shielding effectiveness as the PCB absorbs EM energy. One technique of determining how much energy a PCB absorbs is to measure its absorption cross section (ACS) using a reverberation chamber (RC). The measured ACS can be used to predict the shielding effectiveness of an enclosure when the PCB is inside it using power balance techniques. In this paper the ACS of a number of PCBs are measured both individually and in closely stacked groups. This information is then used to show how the ACS can be used to calculate shielding effectiveness and the results are compared to direct measurement of the SE of the enclosure containing a PCB. Knowledge of the ACS of typical or particular PCBs could be used by engineers to estimate the real shielding effectiveness of an enclosure with contents, when designing electronic systems.",

keywords = "Absorption cross section, electromagnetic shielding, reverberation chamber",

author = "Parker, {Sarah L} and Flintoft, {Ian D} and Marvin, {Andy C} and Dawson, {John F} and Bale, {Simon J} and Robinson, {Martin P} and Ming Ye and Changyong Wan and Mengze Zhang",

note = "{\textcopyright} 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.; EMC Europe 2016 ; Conference date: 05-09-2016 Through 09-09-2016",

year = "2016",

month = sep,

day = "5",

doi = "10.1109/EMCEurope.2016.7739305",

language = "English",

isbn = "9781509014163",

pages = "324--328",

booktitle = "Electromagnetic Compatibility (EMC EUROPE), 2016 International Symposium on",

}

Parker, SL, Flintoft, ID , Marvin, AC , Dawson, JF , Bale, SJ , Robinson, MP, Ye, M, Wan, C & Zhang, M 2016, Predicting Shielding Effectiveness of Populated Enclosures Using Absorption Cross Section of PCBs. in Electromagnetic Compatibility (EMC EUROPE), 2016 International Symposium on. pp. 324-328, EMC Europe 2016, Wroclaw, Poland, 5/09/16. https://doi.org/10.1109/EMCEurope.2016.7739305

TY - GEN

T1 - Predicting Shielding Effectiveness of Populated Enclosures Using Absorption Cross Section of PCBs

AU - Parker, Sarah L

AU - Flintoft, Ian D

AU - Marvin, Andy C

AU - Dawson, John F

AU - Bale, Simon J

AU - Robinson, Martin P

AU - Ye, Ming

AU - Wan, Changyong

AU - Zhang, Mengze

N1 - © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2016/9/5

Y1 - 2016/9/5

N2 - Shielding effectiveness (SE) is an important measure of how well an enclosure reduces the electromagnetic (EM) field incident upon it. Commonly, when the shielding effectiveness of an enclosure is stated it is for the case when the enclosure is empty. Including contents such as printed circuit boards (PCBs) in the enclosure will affect the shielding effectiveness as the PCB absorbs EM energy. One technique of determining how much energy a PCB absorbs is to measure its absorption cross section (ACS) using a reverberation chamber (RC). The measured ACS can be used to predict the shielding effectiveness of an enclosure when the PCB is inside it using power balance techniques. In this paper the ACS of a number of PCBs are measured both individually and in closely stacked groups. This information is then used to show how the ACS can be used to calculate shielding effectiveness and the results are compared to direct measurement of the SE of the enclosure containing a PCB. Knowledge of the ACS of typical or particular PCBs could be used by engineers to estimate the real shielding effectiveness of an enclosure with contents, when designing electronic systems.

AB - Shielding effectiveness (SE) is an important measure of how well an enclosure reduces the electromagnetic (EM) field incident upon it. Commonly, when the shielding effectiveness of an enclosure is stated it is for the case when the enclosure is empty. Including contents such as printed circuit boards (PCBs) in the enclosure will affect the shielding effectiveness as the PCB absorbs EM energy. One technique of determining how much energy a PCB absorbs is to measure its absorption cross section (ACS) using a reverberation chamber (RC). The measured ACS can be used to predict the shielding effectiveness of an enclosure when the PCB is inside it using power balance techniques. In this paper the ACS of a number of PCBs are measured both individually and in closely stacked groups. This information is then used to show how the ACS can be used to calculate shielding effectiveness and the results are compared to direct measurement of the SE of the enclosure containing a PCB. Knowledge of the ACS of typical or particular PCBs could be used by engineers to estimate the real shielding effectiveness of an enclosure with contents, when designing electronic systems.

KW - Absorption cross section

KW - electromagnetic shielding

KW - reverberation chamber

U2 - 10.1109/EMCEurope.2016.7739305

DO - 10.1109/EMCEurope.2016.7739305

M3 - Conference contribution

SN - 9781509014163

SP - 324

EP - 328

BT - Electromagnetic Compatibility (EMC EUROPE), 2016 International Symposium on

T2 - EMC Europe 2016

Y2 - 5 September 2016 through 9 September 2016

ER -

Predicting Shielding Effectiveness of Populated Enclosures Using Absorption Cross Section of PCBs

Abstract

Conference

Bibliographical note

Keywords

Access to Document

Activities

HUAWEI Technologies Co., Ltd.

Projects

Electromagnetic shielding properties of Materials, and Enclosures

Shielding Measurement of Electrically Large Enclosures with Contents

Cite this