FIELD: physics.
SUBSTANCE: device has an antenna, having an unbroken metallic element with a longitudinal axis and a radial axis and at least one cut made in the metallic element, as well as an electrical conductor passing through said at least one cut with formation of an antenna. High- magnetic permittivity material can be placed between the electrical conductor and the bottom of the cuts. The antenna can be made for operation as a radiator for emitting electromagnetic signals into a formation or as a receiver for receiving electromagnetic signals from a formation.
EFFECT: high mechanical strength.
22 cl, 8 dwg
