3D Printed Inverted-F Antenna and Temperature Sensor using Microfluidics Technologies

A novel wireless and passive temperature sensor that utilizes 3D printed inverted-F antenna (IFA) microfluidic and liquid metal technologies for the temperature sensor is introduced in this paper. The thermal volume expansion of liquid metal to progressively increase the length of the arm of IFA which will effectively increase or decrease with respect to temperature. In this way, the sensed temperature value can be accurately quantified by the change in its resonant frequency. Simulation result shows the sensitivity of temperature is 2.54 MHz/°C.