Electromagnetic tool using slotted point dipole antennas

An electromagnetic wave propagation tool comprising:

• a transceiver electronics system disposed on a drill collar segment, the transceiver electronics system comprising a magnetic dipole based antenna having:
• a plurality of slot based magnetic dipoles comprising at least two slots in an outer surface of the drill collar segment and wire holes beneath the outer surface of the drill collar segment, the wire holes connecting adjacent slots;
• ferrite rods positioned in the slots;
• a first continuous antenna wire routed through a first set of the slots via the wire holes in a first route and turns around to repass through the first set of the slots and wire holes via a second route, wherein two wire segments of the first continuous antenna wire in each slot are positioned above and below each ferrite rod within each slot, the first continuous antenna wire further connecting to and from the transceiver electronic system;
• a second continuous antenna wire routed through a second set of the slots via the wire holes in a third route and turns around to repass through the second set of slots and wire holes in a fourth route, wherein two wire segments of the second continuous antenna wire in each slot are positioned above and below each ferrite rod within each slot, the second continuous antenna wire further connecting to and from the transceiver electronic system;
• and,
• wherein the transceiver electronics system further comprises a subsystem that maintains relative amplitude and phase between currents in the first continuous antenna wire and the second continuous antenna wire.

A magnetic dipole based antenna for use an antenna system disposed on a drill collar segment, comprising:

• a plurality of slot based magnetic dipoles comprising at least two slots in an outer surface of the drill collar segment and wire holes beneath the outer surface of the drill collar segment, the wire holes connecting adjacent slots;
• ferrite rods positioned in the slots;
• and,
• a continuous antenna wire passing through slots and wire holes via a first route, the continuous antenna wire turning around and repassing through the slots and the wire holes via a second route such that two wire segments in each slot are positioned above and below each ferrite rod.