Shielding method and apparatus using transverse slots
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United States of America Patent
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-
May 20, 2003
Issued Date -
N/A
app pub date -
Dec 22, 2000
filing date -
Dec 1, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A shielding method and apparatus for an antenna disposed on an elongated support adapted for disposal within a borehole. The shield providing predetermined attenuation of one or more electromagnetic energy field components as the field components interact with the shield. The shield composed of a flexible strip or cylindrical body and respectively comprising a transverse conductive element or a transverse slot therein. The shields being adapted to cover an antenna mounted on the support. The shields being compatible for use in conjunction with saddle, tilted coils or multi-layered tri-axial coils to produce a pure transverse magnetic dipole electromagnetic field. The shields are also used in methods for shielding an antenna disposed on a support to provide predetermined attenuation of an electromagnetic field component as the field components interact with the shield.
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