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Sensors 2015, 15(11), 28563-28573; doi:10.3390/s151128563

Reusable EGaIn-Injected Substrate-Integrated-Waveguide Resonator for Wireless Sensor Applications

School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 156-756, Korea
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Academic Editor: Markus W. Sigrist
Received: 27 August 2015 / Revised: 12 October 2015 / Accepted: 9 November 2015 / Published: 11 November 2015
(This article belongs to the Section Physical Sensors)
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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. View Full-Text
Keywords: wireless sensors; multi-resonator; SIW; EGaIn; liquid metal; RFID; chipless tag; barcode wireless sensors; multi-resonator; SIW; EGaIn; liquid metal; RFID; chipless tag; barcode
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Memon, M.U.; Lim, S. Reusable EGaIn-Injected Substrate-Integrated-Waveguide Resonator for Wireless Sensor Applications. Sensors 2015, 15, 28563-28573.

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