GEAR FOR GEOLOGICAL ELECTRICAL PROSPECTING Russian patent published in 2001 - IPC

FIELD: geophysics. SUBSTANCE: invention is related to geological electrical equipment using high- frequency electromagnetic waves which can be employed in search for mineral resources, in search for engineering service lines and other hidden inhomogeneities in examined layer of the Earth surface located under surface. Gear incorporates transmitting and receiving units. Transmitting unit includes clock pulse generator, sawtooth voltage generator, controlled generator with tunable frequency, amplitude modulator, power amplifier with tunable frequency and emitting antenna. Receiving unit has receiving antenna, preselector, first narrow-band filter, phase inverter, first adder, heterodyne. first +90 degrees phase inverter, first and second mixers, first and second intermediate frequency amplifiers, second +90 degrees phase inverter, second adder, first multiplier, second narrow-band filter, amplitude detector, key, selective amplifier, amplitude meter, first and second amplitude limiters, second multiplier, third narrow-band filter and phase meter. EFFECT: enhanced noise immunity and precision of measurement of amplitude and phase of reflected signal. 2 dwg