Patent ID: RE39982

Claim:
A magnetic inductance communications system, comprising: a first transmission/reception coil producing a magnetic field including a transmitted signal; a plurality of second transmission/reception coils having different orientations for receiving the transmitted signal and generating a plurality of received signals; a summing circuit for combining the plurality of received signals to produce a summed signal; at least one first phase adjusting circuit for adjusting a phase of at least one respective received signal prior to summing to increase the amplitude of the summed signal; and a modulator circuit for modulating a signal to be transmitted, wherein the modulator circuit includes: at least one second phase adjusting circuit receiving a carrier signal and a phase adjustment signal from the at least one first phase adjusting circuit; a plurality of driving circuits, each driving circuit receiving the signal to be transmitted and a respective output signal from one of the second phase adjusting circuits, for generating a respective driving signal on one of the plurality of second transmission/reception coils to generate a second magnetic field; and signal processing circuitry connected to the first transmission/reception coil to receive the signal in the second magnetic field.