Presentation 2013-06-17
Shaping Magnetic-Field Patterns with Multiple Current Loops : Toward Short-Range Wireless Identification
Ai-ichiro SASAKI, Takayuki OGASAWARA, Koji FUJII, Hiroki MORIMURA, Osamu KAGAMI,
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Abstract(in English) We propose a concept of wireless identification systems whose communication area is restricted to about 50 cm from a reader/writer. To realize such systems, it is required that magnetic fields are rapidly attenuated outside the communication area. In this paper, a method for controlling spatial distribution of magnetoquasistatic fields is investigated. The key concept of the method is designing multiple current loops so as to cancel the sum of magnetic moments associated with the loops. To validate the method, we evaluated magnetic-field distribution around a concentric double-current loop and observed the rapid attenuation characteristics of the fields. Validity of the method was experimentally demonstrated.
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Keyword(in English) Magnetoquasistatic field / Current loop / Magnetic moment / NFC / Communication area
Paper # SRW2013-13
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Committee SRW
Conference Date 2013/6/10(1days)
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Registration To Short Range Wireless Communications(SRW)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Shaping Magnetic-Field Patterns with Multiple Current Loops : Toward Short-Range Wireless Identification
Sub Title (in English)
Keyword(1) Magnetoquasistatic field
Keyword(2) Current loop
Keyword(3) Magnetic moment
Keyword(4) NFC
Keyword(5) Communication area
1st Author's Name Ai-ichiro SASAKI
1st Author's Affiliation NTT Microsystem Integration Laboratories()
2nd Author's Name Takayuki OGASAWARA
2nd Author's Affiliation NTT Microsystem Integration Laboratories
3rd Author's Name Koji FUJII
3rd Author's Affiliation NTT Microsystem Integration Laboratories
4th Author's Name Hiroki MORIMURA
4th Author's Affiliation NTT Microsystem Integration Laboratories
5th Author's Name Osamu KAGAMI
5th Author's Affiliation NTT Microsystem Integration Laboratories
Date 2013-06-17
Paper # SRW2013-13
Volume (vol) vol.113
Number (no) 85
Page pp.pp.-
#Pages 6
Date of Issue