電磁放射デカップラー

Japanese Patent JP5148487

B2

An RF tag 24 is mounted on a radiation decoupler that isolates the tag from the effect of an object that it is mounted upon. The decoupler comprises a dielectric layer 25 sandwiched between two conducting layers 21, 23. Conducting layer 21 is absent from a portion 22 of the dielectric layer, forming for example a slit 22. RF tag 24 is mounted so that its chip lies over the centre of slit 22. A spacer 26, bonding adhesive layer 25 and sensitising layer 27 may also be included. The slit is dimensioned according to the wavelength of the interrogating radiation used with the tag, but is generally of sub-wavelength dimensions. The decoupler is particularly useful when the RFID tag must be mounted on a metal object. The lower conductor layer 23 may be omitted in this case. Alternatively, decoupling can be achieved by mounting the RF tag orthogonally to the edge of a metal clad circuit board.

Brown, James Robert
Lawrence, Christopher Robert
Clark, Paul Richard
Damarell, William Norman

JP2008517600A

February 20, 2013

June 22, 2006

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H01Q15/14; G06K19/07; G06K19/077; H01Q13/08

JP2004007559A
JP2005094360A
JP2004514364A
JP2003529259A
JP2006311239A
JP4170803A
JP2005149298A
JP2005079832A
JP2004304226A
JP2006319496A
JP2003085520A

大宮 健司、大西 廣貴、小川 栄一、太田 智三,偏波変換アダプタによるRFIDタグ読取り距離の拡大,平成16年電気関係学会関西支部連合大会講演論文集,日本,平成16年 電気関係学会関西支部連合大会実行委員会,2004年11月25日,G240

Yoshio Kawaguchi
Makoto Ono
Chihiro Watanabe
Kenkyo Kanayama
Katsuma Osaki
Mitsuaki Tsubokura

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