Efficient Simulation Method for Wireless Power Transfer

With the development of the internet of things, it becomes necessary to wirelessly power distributed sensors. However, it is not straightforward to accurately estimate the available wireless power at certain points in a specific propagation scenario using traditional methods. This is due to the compro- mised accuracy for large problems and the long time required to run their simulation. In this paper, we present a novel model to accurately calculate the received power by distributed RF sensors using the wave integral equation solver and a developed calculation method using reciprocity theorem. The model is tested in a prototype to simulate a propagation scenario in harsh electromagnetic environments with a reverberation-like behaviour. The propagation scenario consists of a transmitter placed ahead of the prototype aperture and a receiver is moved inside the prototype and the obtained results are compared from both simulation and measurement to rigorously investigate their accuracy and model performance. Based on comparison with measurements and benchmarking with the time domain results, the proposed model is superior for both time and accuracy as it is 20 times faster and gives closer results to measurements than its time domain counterpart.