• Proceedings of the KWS Conference
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• 2000.10a
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• pp.240-242
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• 2000

This study was investigated absorption properties of electromagnetic wave in thermal sprayed Sr-ferrite coatings. The experiment of this study was ; manufactured thermal spraying powder for improving absorption-efficiency, processed for increasing strength of thermal spray coatings, and measured the electromagnetic wave shielding efficiency. This study was obtained excellent absorption-efficiency by thermal sprayed Sr-ferrite coatings.

• Proceedings of the Membrane Society of Korea Conference
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• 1997.10a
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• pp.75-76
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• 1997

1. 서론 : 전도성 고분자인 폴리아닐린은 여러 흥미로운 성질을 지니고 있어 많은 연구대상으로 주목받고 있다. 폴리아닐린 필름은 캐스팅이 용이하여 많은 응용을 가져올 것으로 기대된다. 예를 들어 전도성을 부여하는 플라스틱 소자, 전자파 차폐재료 뿐만 아니라 분리용 전도성 고분자막, 의료용 히들로겔 제조 등 이제까지 재료의 제한을 받았던 분야에 응용이 기대되고있다.(생략)

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.06a
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• pp.887-888
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• 2009

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.06a
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• pp.807-808
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• 2009

• Proceedings of the Korean Ceranic Society Conference
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• 2003.10a
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• pp.229.1-229
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• 2003

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.261-262
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• 2010

• Proceedings of the Materials Research Society of Korea Conference
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• 2008.05a
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• pp.38.1-38.1
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• 2008

• Proceedings of the Korean Magnestics Society Conference
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• 2016.05a
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• pp.174-174
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• 2016

• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.8
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• pp.76-82
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• 2016

In this paper, we evaluated shielding effectiveness (SE) of carbon nanotube (CNT) film using near field scanning (NFS) in near field analysis. We adopted CNT film with deposit carbon density of 5% and thickness of 1mm for evaluation of shielding characteristic. Using a test coupon analogized to an actual IC package, we measured SE according to measuring position and SE according to distances between the CNT film and the test coupon. As a result, the measured SE in the near field varied with frequency. Especially, the measured electric field SE in the center of the test coupon is better than that of the measured edge point of the test coupon where it is affected by fringing effect. The results show that the measured SE in the near field is affected not only by frequency but also by measurement environment such as position and height of the probe and height of shielding film. In conclusion, we should choose proper methods for SE measurement considering interference distance in the electronic control system because there is little correlation between the proposed evaluation method in the near field and ASTM D 4935-10.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.14 no.2
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• pp.81-86
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• 2015

This study investigated electromagnetic interference (EMI) shielding effectiveness (SE) of hybrid conductive fabrics. The coaxial transmission line method was used to measure the EMI Shielding effectiveness of the conductive fabrics. We designed and constructed a measuring system, consisting of a network analyzer and a device that serves as a sample holder and at the same time as a transmission medium of incident electromagnetic waves. The measurements of SE were carried out in a frequency range from 100 MHz to 2 GHz. The results of the EMI shielding experiments showed that the maximum electromagnetic shielding effectiveness (EMSE) values of sandwich type C/A/C (carbon fiber sheet/aluminum foil tape/carbon fiber sheet) and C/Ni/C (carbon fiber sheet/magnetic shielding foil/carbon fiber sheet) samples were 55 dB and 113 dB, respectively, at a frequency of 1.9 GHz.