IMPROVED LOGGING ANTENNAE BASED ON NUCLEAR MAGNETIC RESONANCE

摘要

FIELD: physics. ^ SUBSTANCE: improvement is achieved by adding extra coils to a part of antenna, either surrounding ferrite material or lying on the surface of at least partially dielectric material. Additional coils or half-coils combined with radio frequency field of parallel antenna parts create radio frequency field component proportionally higher than radio frequency field component of unimproved coil parts. Additionally, total radio frequency field can be shaped in form of geological environment sample depending on improvement coil positioning. E.g., thus total radio frequency field can be obtained for orthogonal alignment against static magnetic field across major area of sample. ^ EFFECT: improved antenna properties. ^ 21 cl, 15 dwg