The development of magnetic shielding effectiveness measurement tester in near field

2017 ◽  
Author(s):  
Yu-sang ◽  
Chaochan Chen ◽  
Yi-Miao
Keyword(s):  
Near Field ◽  
Magnetic Shielding ◽  
Shielding Effectiveness ◽  
Effectiveness Measurement

Homogenization of Composite Panels From a Near-Field Magnetic Shielding Effectiveness Measurement

2012 ◽  
Vol 54 (3) ◽  
pp. 700-703 ◽  
Author(s):  
G. Andrieu ◽  
J. Panh ◽  
A. Reineix ◽  
P. Pélissou ◽  
C. Girard ◽  
...  
Keyword(s):  
Near Field ◽  
Magnetic Shielding ◽  
Composite Panels ◽  
Shielding Effectiveness ◽  
Effectiveness Measurement

scholarly journals A New Methodology to Predict the Magnetic Shielding Effectiveness of Enclosures at Low Frequency in the Near Field

2015 ◽  
Vol 51 (3) ◽  
pp. 1-4 ◽  
Author(s):  
Amin Frikha ◽  
Mohamed Bensetti ◽  
Fabrice Duval ◽  
Nabil Benjelloun ◽  
Frederic Lafon ◽  
...  
Keyword(s):  
Near Field ◽  
Low Frequency ◽  
Magnetic Shielding ◽  
Shielding Effectiveness

scholarly journals Significant enhancement of magnetic shielding effect by using the composite metamaterial composed of mu-near-zero media and ferrite

2021 ◽  
Vol 8 ◽  
pp. 13
Author(s):  
Xu Chen ◽  
Yuqian Wang ◽  
Zhiwei Guo ◽  
Xian Wu ◽  
Fengqing Yang ◽  
...  
Keyword(s):  
Small Area ◽  
Near Field ◽  
Experimental Results ◽  
Shielding Effect ◽  
Magnetic Shielding ◽  
Shielding Effectiveness ◽  
Large Area ◽  
Magnetic Shield ◽  
Field Control ◽  
Ferrite Slab

The magnetic shield plays an important role in magnetic near-field control. However, the requirements of efficiency, ultra thinness, lightness and cheapness are still the challenges. Here, we firstly propose a composite metamaterial in which the mu-near-zero media is covered with a ferrite slab. We verify that this structure can enhance the shielding effectiveness (SE) in a small area. Furthermore, we optimize the magnetic path by changing the bulk ferrite slab into a patterned slab. In this way, significant SE enhancement can be achieved in a large area. Experimental results show that the maximum SE of the composite metamaterial with a patterned ferrite is 20.56 dB, which is nearly 19 dB higher than that of a single ferrite slab with the same thickness of the composite metamaterial. The results on the composite metamaterial would be very useful in the applications involving magnetic shielding.

Magnetic Shielding Effectiveness of Enclosures in Near Field at Low Frequency for Automotive Applications

2015 ◽  
Vol 57 (6) ◽  
pp. 1481-1490 ◽  
Author(s):  
Amin Frikha ◽  
Mohamed Bensetti ◽  
Lionel Pichon ◽  
Frederic Lafon ◽  
Fabrice Duval ◽  
...  
Keyword(s):  
Near Field ◽  
Low Frequency ◽  
Magnetic Shielding ◽  
Automotive Applications ◽  
Shielding Effectiveness

scholarly journals Magnetic Shielding Effectiveness Measurement of Magnetic Steel Sheets in ELF Range

2008 ◽  
Vol 13 (4) ◽  
pp. 173-176
Author(s):  
Kyo-Heum Yeon ◽  
Derac Son ◽  
Eon-Byeong Park ◽  
Jae-Young Lee ◽  
Kyung-Hwan Do ◽  
...  
Keyword(s):  
Magnetic Shielding ◽  
Shielding Effectiveness ◽  
Steel Sheets ◽  
Effectiveness Measurement ◽  
Magnetic Steel

Research of the Distance of Transmitting Antenna and Test Window to Measure Shielding Effectiveness of Material Using Shielded Room Method

2013 ◽  
Vol 391 ◽  
pp. 520-523
Author(s):  
Li Jun Qin ◽  
Hao Liang Yang
Keyword(s):  
Plane Wave ◽  
Field Emission ◽  
Near Field ◽  
Far Field ◽  
Shielding Effectiveness ◽  
Measurement Results ◽  
Effectiveness Measurement ◽  
Transmitting Antenna

t has the certain request to the distance of transmit antennas and test window when measure the effectiveness of material using shielded room method. In order to obtain the shielding effectiveness of materials on the plane wave, far field emission state of the antenna should be ensured-distance of transmitting antennas and test window distance should be far enough. This paper presents a near-field shielding theory of a shielded room, explaining the effect of the distance on the shielding effectiveness measurement results fundamentally. The theory can be used to guide the test that measures shielding effectiveness of material using shielded room method.

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