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Microwave absorption properties in absorbers for mobile phones
- Authors
- Min, Eui Hong; Kim, Moon Suk; Ko, Jae Gui
- Issue Date
- Jun-2008
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- electromagnetic interference (EMI); microwave absorber; permalloy; sheet-type
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.52, no.6, pp.1850 - 1853
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 52
- Number
- 6
- Start Page
- 1850
- End Page
- 1853
- ISSN
- 0374-4884
- Abstract
- Permalloy composite microwave absorbers mixed with silicone for mobile phones and the effects of the thickness of the samples on the absorption were studied. A permalloy EM wave absorber with the ratio of permalloy : silicon rubber = 60 : 40 wt% showed -3.15 dB, -5.0 dB, -6.09 dB, -4.57 dB and -4.39 dB at 1.8 GHz for 0.7 mm, 1.0 mm, 1.3 mm, 1.6 min and 1.7 min thickness, respectively. We suggest permalloy for use as a EM wave absorber in the S-band and the EM wave absorber fabricated with thickness of 1.3 mm has an absorption ability -6.09 dB in the frequency range of 1.4 similar to 2 GHz.
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