DOWNHOLE ELECTROMAGNETIC INDUCTION COMMUNICATION DEVICE

There is described a downhole electromagnetic induction communication system with a receiver arranged to receive from a transmitter a magnetic signal. The downhole electromagnetic induction communication system receiver comprising: a first inductive coil, a second inductive coil, and an amplifier; wherein the first inductive coil and the second inductive coil are configured to convert the magnetic signal into a first input electrical signal and a second input electrical signal. Additionally, the first inductive coil and the second inductive coil are differentially connected to inputs of the amplifier, such that a differential input electrical signal is found, the differential input electrical signal comprising reduced noise compared with the first input electrical signal and the second input electrical signal. The downhole electromagnetic induction communication system reduces noise and improves a signal-to-noise ratio of communications.