Dual frequency system for power-demanding measurement in the isolated areas

Abstract

The paper presents solution for wireless and battery-less measurement in the enclosed areas. The principle is based on previous work, while this paper is focused on high power-demanding applications such as MEMS accelerometers, gas sensors, piezoresistive strain gauges, etc. It can be suitable for continuous wireless and battery-less measurement in isolated systems such as the rotating objects, concrete walls, enclosed barrels, high temperature chambers etc. It is based on near magnetic field coupling in radiofrequency band. The principle is similar to the RFID, while it is more powerful and the powering and signal transfer is separated by the different frequencies. The antennas are designed for surface mounting. The system is desired to be used in long-term monitoring of the environment.