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Material Performance Testing
KEC Method - Electric Field Shielding Data
This is electric field shielding data (in dB: decibels) for MGnet stacked in 1 to 4 layers across different frequencies. * 40dB indicates 99% shielding, 60dB indicates 99.9% shielding performance. If you want to completely block mobile phone signals, you need shielding performance of at least 40dB, so please use three or more layers of MGnet.
▲Comparison of near-field shielding performance by layering MGnet (KEC Method): "Measurement Limit" indicates the measurement threshold. The data shows that shielding performance increases from 20dB to 60dB against high-frequency electromagnetic waves from 1MHz to 2.5GHz as more layers are added.
KEC Method - Electric Field Shielding Measurement Method
Comparison of Electromagnetic Shielding Performance with MGnet Layering
A comparative test was conducted on the electromagnetic shielding performance of layered MGnet. Near-field shielding performance was measured using the KEC method as shown on the right. The results (see chart and graph above) indicate that layering MGnet increases shielding performance against high-frequency electromagnetic waves from 1MHz to 2.5GHz. KEC Method for Measuring Near-Field Shielding Performance (Fig. 1)
(Fig. 1)
Free Space Method - Electric Field Shielding Data
This is electric field shielding data (in dB: decibels) for MGnet stacked in 1 to 6 layers across various frequencies. The shielding performance of MGnet across different frequency bands was evaluated by HVS Technologies, Inc. (an electromagnetic absorption and shielding material testing institution affiliated with the Electronic Acoustics Research Center in the U.S.). Results confirmed shielding performance of 30–40dB or more at 0.045GHz to 1.4GHz and 20–40dB or more at 7.75GHz to 13.0GHz. Details are shown in Table 2 below.
| Test Date | December 10, 1997 |
|---|---|
| Testing Facility | HVS Technologies, Inc. (U.S. center specializing in electromagnetic absorption shielding materials and test equipment) |
| Tester | Prof. Vijay K. Varadan (Electronic Acoustics Materials and Devices Research Center, Pennsylvania State University, U.S.) |
| Shielding Material Used | MGnet |
| Measurement Equipment | HVS Free Space Microwave Measurement System |
| Measurement Method | Measurement of electromagnetic wave absorption and transmission attenuation using HVS Free Space Microwave Measurement System |
| Measurement Results |
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