Plecto
Full Member level 5

Hello
I'm making an inductive power transfer system that is in the need of a way of communicating through the inductive link. My first thought was to modulate the current draw on the receiving side and modulating the voltage on the transmitting side, but it then became apparent that we need a way higher bit rate than what can be achieved with this method. My thought is to add a high frequency modulated signal on top of the power transfer with a modulator and demodulator in each end. I've never worked with radio or modulation techniques of this kind before although I do remember the principles from university. The baud rate requirement is 115200 baud/s minimum although 1 Mbaud/s is desirable. I was able to easily transfer 10Mhz through the resonant coils, but it started to get attenuated at 15Mhz (the highest my function generator can go). I'm not looking to delve into and get a depth understanding of all of the different modulation schemes, I'm rather hoping that someone could help me and point me in the right direction of what kind of IC's that accomplish this? What kind of modulation scheme would be appropriate for this kind of application?