title: Reusable EGaIn-Injected Substrate-Integrated-Waveguide Resonator for Wireless Sensor Applications.
abstract: The proposed structure in this research is constructed on substrate integrated waveguide (SIW) technology and has a mechanism that produces 16 different and distinct resonant frequencies between 2.45 and 3.05 GHz by perturbing a fundamental TE10 mode. It is a unique method for producing multiple resonances in a radio frequency planar structure without any extra circuitry or passive elements is developed. The proposed SIW structure has four vertical fluidic holes (channels); injecting eutectic gallium indium (EGaIn), also known commonly as liquid metal (LM), into these vertical channels produces different resonant frequencies. Either a channel is empty, or it is filled with LM. In total, the combination of different frequencies produced from four vertical channels is 16.
authors.affiliation: School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 156-756, Korea. musmanm@outlook.com.
authors.forename: Muhammad Usman
authors.initials: MU
authors.lastname: Memon
authors.affiliation: School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 156-756, Korea. sungjoon@cau.ac.kr.
authors.forename: Sungjoon
authors.initials: S
authors.lastname: Lim
keywords: EGaIn; RFID; SIW; barcode; chipless tag; liquid metal; multi-resonator; wireless sensors