Inductively Powered Sensornode Transmitter Based on the Interconnection of a Colpitts and a Parallel Resonant LC Oscillator

An inductively powered passive transmitter architecture for wireless sensornodes is presented in this paper. The intended applications are internally illuminated photoreactors. application range of photoreactors wide. They used, e.g., microalgae cultivation or photochemistry, just to name two important fields use. inductive powering system used transmit energy the internal illumination be additionally supply here transmitter. aim expanding named with sensors obtain a better insight into processes inside it. This will achieved by measuring essential parameters such as, temperature, pH value, gas concentrations medium reactor, which algal would water. Due electronics, there no need batteries, and therefore, temporal limitations their operational cycle given. data transmission also implemented using layer low frequency range. transmitting coil receive as one same order avoid interference unwanted couplings between them, save weight space. Additionally, works two-step alternating cycle: harvesting step, followed step. measured values sent on-off keying. Therefore, Colpitts oscillator switched on off. circuit simulated SPICE simulations consequentially prototype perform practical analyses measurements. feasibility our therefore shown performed simulations, practically, testing an laboratory scaled photoreactor.