Representative Contents Design for Shielding Enclosure Qualification from 2 to 20 GHz

TY - JOUR

T1 - Representative Contents Design for Shielding Enclosure Qualification from 2 to 20 GHz

AU - Flintoft, Ian David

AU - Bale, Simon Jonathan

AU - Marvin, Andrew Charles

AU - Ye, Ming

AU - Dawson, John Frederick

AU - Wan, Changyong

AU - Zhang, Mengze

AU - Parker, Sarah Louise

AU - Robinson, Martin Paul

N1 - © 2017 IEEE.

PY - 2018/2/1

Y1 - 2018/2/1

N2 - The electromagnetic environment inside a shielding enclosure is affected by the absorption characteristics of the contents, which should therefore be represented in shielding measurements and simulations. At frequencies up to a few gigahertz, lossy dielectric materials have previously been used as surrogates for printed circuit boards in enclosure shielding assessment, both experimentally and in simulations. However, no systematic methodology for the design of these surrogates and their calibration against real hardware at high frequencies has been elucidated. In this paper we show how both lossy dielectric material and microstrip transmission line based “representative contents” can be designed and calibrated against real printed circuit boards over the frequency range 2-20 GHz using power balance concepts. The calibration is made by matching the average absorption cross-section of the surrogate to an average value for a class of real contents measured in a reverberation chamber. The surrogates are designed using efficient power balance models for layered media and field-excited microstrip lines and verified using full-wave simulation. The fabricated surrogates are validated by shielding measurements. The methodology presented could form an important part of future standards for enclosure qualification measurements that more accurately represent the internal environment of real equipment.

AB - The electromagnetic environment inside a shielding enclosure is affected by the absorption characteristics of the contents, which should therefore be represented in shielding measurements and simulations. At frequencies up to a few gigahertz, lossy dielectric materials have previously been used as surrogates for printed circuit boards in enclosure shielding assessment, both experimentally and in simulations. However, no systematic methodology for the design of these surrogates and their calibration against real hardware at high frequencies has been elucidated. In this paper we show how both lossy dielectric material and microstrip transmission line based “representative contents” can be designed and calibrated against real printed circuit boards over the frequency range 2-20 GHz using power balance concepts. The calibration is made by matching the average absorption cross-section of the surrogate to an average value for a class of real contents measured in a reverberation chamber. The surrogates are designed using efficient power balance models for layered media and field-excited microstrip lines and verified using full-wave simulation. The fabricated surrogates are validated by shielding measurements. The methodology presented could form an important part of future standards for enclosure qualification measurements that more accurately represent the internal environment of real equipment.

KW - shielding, printed circuit board, absorption cross-section, reverberation chamber, power balance

KW - printed circuit board (PCB)

KW - shielding

KW - reverberation chamber (RC)

KW - power balance (PWB)

KW - Absorption cross section (ACS)

UR - http://www.scopus.com/inward/record.url?scp=85019838387&partnerID=8YFLogxK

U2 - 10.1109/TEMC.2017.2702595

DO - 10.1109/TEMC.2017.2702595

M3 - Article

SN - 0018-9375

VL - 60

SP - 173

EP - 181

JO - IEEE Transactions on Electromagnetic Compatibility

JF - IEEE Transactions on Electromagnetic Compatibility

IS - 1

M1 - 7932540

ER -