Coupling thermometer for sensing antenna

Abstract

This article presents an antenna with sensing capabilities using shift frequency properties to determine the temperature. This antenna is made up of a printed dipole and a mercury thermometer operating between 10 and 53°C. The dipole is used to excite by electromagnetic coupling the thermometer which acts as an equivalent parasitic metallic liquid dipole. The changes in physical dimensions of the mercury dipole due to temperature changing involve a frequency shift of its resonant frequency. The measured results show this frequency variation as a function of the temperature. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1557–1560, 2016