Field generator
Transmitter coil
An total of eight transmitter coils are used in the Anser EMT system. Each coil emits a time-varying magnetic field in the 20kHz band. Each coil is connected to a single channel of the Signal Generator AC Amplifer stage. The transmitter coil is fabricated as a printed circuit board. Schematic and Gerber files for the coil design are available in the project repository. The design for a single PCB coil is shown in the figure below. A vector image of this figure can be found here.