Chipless wireless temperature sensor based on quasi-BIC resonance

Ildar Yusupov, Dmitry Filonov, Andrey Bogdanov, Pavel Ginzburg, Mikhail V. Rybin, Alexey Slobozhanyuk

Research output: Contribution to journalArticlepeer-review

Abstract

Wireless sensors find use in many practical applications, where wired connections possess a limitation. New realms of global connectivity and data exchange among various devices suggest putting a sensor on a consumable level, where electronic circuits are not affordable from an economic standpoint. Chipless approaches, aiming to address the later issue, typically come with a penalty of performance degradation and, in many cases, is seen as a compromise solution. Here, we demonstrate a concept of the extremely sensitive temperature sensor based on the bound states in the continuum (BIC) approach. A ceramic half-cylinder above a ground plane is designed to support high quality factor supercavity modes with a strong resonant dependence on an ambient temperate. The operation of the sensor is experimentally demonstrated in a broad range of temperatures, spanning from 25 to 105 °C with an average sensitivity of 4 MHz/°C. The key element, leading to this performance, is high-quality ceramics, which allows supporting confined modes with moderately low Ohmic losses and extremely high-quality factors above 1000. High-performance chipless devices, which are capable to accommodate several functions with a single platform, open a venue to a new generation of wireless distributed sensors, where the main technological and outlay efforts are placed on an interrogation side.

Original languageEnglish
Article number193504
JournalApplied Physics Letters
Volume119
Issue number19
DOIs
StatePublished - 8 Nov 2021

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