Simulation of liquid thermal expansion effect for wireless passive microfluidic temperature sensor

Miniaturized temperature sensor based on micro-fluidic technology and radar passive interrogation principles, that can be easily applied for temperature telemetry for medical applications. The chipless micro-system is made up of a planar-gap capacitor with a microchannel located in between its plates. The temperature-dependent expansion/shrinkage of the water inside the micro-channel modifies in a monotonic way the liquid level across the capacitor. In this paper presented problem of modeling liquids thermal expansion and ways of solving problems.