发明名称 EXTENDED RANGE EMF ANTENNA
摘要 An antenna for use in an asset-identification system. The antenna includes a plurality of electrically conductive coils electrically connected in parallel. The coils are physically aligned along a common axis. The coils are offset along the common axis by a distance selected to reduce the mutual inductance between the electrically conductive coils, while allowing the signals from the electrically conductive coils to add together.
申请公布号 US2014091146(A1) 申请公布日期 2014.04.03
申请号 US201314045221 申请日期 2013.10.03
申请人 NATIONAL OILWELL VARCO, L.P. 发明人 STREATER JESSIE DARRELL
分类号 G06K7/10;H01Q7/08 主分类号 G06K7/10
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