Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Sadatoshi Oishi0
Masakazu Kato0
Date of Patent
July 14, 2009
0Patent Application Number
115174230
Date Filed
September 7, 2006
0Patent Primary Examiner
Patent abstract
A reader antenna is connected to an interrogator. Conductors are arranged at two places at the opposed marginal edge portions of a radiation plane of the reader antenna along a radiation direction of an electromagnetic wave from the reader antenna. The conductors raises the electric power density above the reader antenna. A storage case is set above the reader antenna and has many items arranged at narrow intervals with radio tags attached thereto. The storage container has the radio tags arranged substantially parallel to the polarization direction of the reader antenna. By doing so, adequate drive power is applied to the radio tag by an electromagnetic wave from the reader antenna.
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