Electromagnetic tool using slotted point dipole antennas
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United States of America Patent
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Oct 15, 2024
Grant Date -
Jul 27, 2023
app pub date -
Mar 27, 2023
filing date -
Oct 28, 2019
priority date (Note) -
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Abstract
Slotted dipole antennas for use in an antenna system on a drill collar segment is presented. Dipoles may be placed in slots on the drill collar segment. A dipole consists of a ferrite rod with electric wires placed above and below the ferrite rod. Wires may be connected such that wire current forms a loop around the ferrite rod. When a group of slots are used for an antenna, wire holes are constructed between slots. Effectively a single wire may be used to go above all ferrite rods in the group and then turn to go below all the ferrite rods. Two wire segments are in a wire hole connecting two adjacent slots. Currents in the two segments are the same in magnitudes and flow in opposite directions. There is no net current in wires in a wire hole.
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