Reader andor writer apparatus, power feeding syst

专利名称：Reader and/or writer apparatus, power

feeding system, and communication system

发明人：Yoshihiko Hayashi,Takashi Suga,Kouichi

Uesaka,Ryouzou Yoshino,Keisuke Igarashi

申请号：US09100325申请日：19980619公开号：US06194993B1公开日：20010227

专利附图：

摘要：A reader and/or writer apparatus, a power feeding system and a power feedingand communication transmission and/or reception system in a proximate wireless card

system arranged so that power which satisfies the requirement of the Radio Law (500&mgr;V/m at a distance of 3 m from the reader and/or writer apparatus) regarding theradiated electric field is supplied sufficiently from the reader and/or writer apparatus tothe proximate wireless card (IC card). The reader and/or writer apparatus has a spirallyshaped or coil-shaped antenna for generating electromagnetic fields both to supplyoperational power to an IC card and to perform transmission and/or reception of signalsfor communication to and/or from the IC card and a conductor member for forming amirror image of the antenna on its back side.

申请人：HITACHI, LTD.,KOKUSAI ELECTRIC CO., LTD.

代理机构：Antonelli, Terry, Stout & Kraus, LLP

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