TRANSMIT - RECEIVE COIL SYSTEM FOR NUCLEAR QUADRUPOLE RESONANCE SIGNAL DETECTION IN SUBSTANCES AND COMPONENTS THEREOF

摘要

An antenna and shield apparatus for detecting phenomenal signals using nuclear and electronic resonance detection technology, comprising: a transmit and receive antenna, an electric field shield (60) and an outer shield (52). The antenna is a multiple parallel loop transmit-receive antenna forming a main coil assembly (11) having a plurality of loop segments (20) optionally interconnected by connectors in the form of conducting bars (10), relays (16), or nothing. The electric field shield (60) comprises an inner sleeve of conducting material (60, 68) disposed on the inside of the coil assembly (11) for shielding the electric field emanating from the coil assembly (11) from the target volume circumscribed by the assembly. The outer shield (52) comprises a central screen portion (55), waveguides (57) at either end thereof and a sloping channel portion for interconnecting the two. The coil assembly 11 and the electric field shield (60) are housed within the outer shield (52).