A new reconfigurable liquid-metal-antenna-based sensor

In this paper, a new sensor chip with frequency reconstruction range of 2.252 GHz similar to 2.450 GHz is designed and fabricated. On this basis, a self-designed T-shaped shell is added to overcome the disadvantage of uneven deformation of the traditional steel shell, and the range of the sensor chip is expanded to 0 kN similar to 96 kN. The liquid metal antenna is used to carry out a step-by-step loading test, and the relationship between the antenna resonance frequency and the pressure load is analyzed. The results show that there is a good linear relationship between the pressure load and the resonant frequency. Therefore, the liquid metal antenna can be regarded as a pressure sensor. The cyclic loading and unloading experiments of the sensor are carried out, and different loading rates are used to explore the influence on the performance of the sensor. The loading and unloading characteristic curves and the influence characteristic curves of loading rate are plotted. The experimental results show that the sensor has no residual deformation during the cycle of loading and unloading. Moreover, the influence of temperature on the performance of the sensor is studied, and the temperature correction formula is derived.

Automated summary

A new sensor chip with a frequency reconstruction range of 2.252 GHz similar to 2.450 GHz is designed and fabricated in this paper. By adding a self-designed T-shaped shell and using a liquid metal antenna, the sensor range is expanded to 0 kN similar to 96 kN. Experimental results show that the sensor has good performance and can be used for pressure measurements.