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http://dx.doi.org/10.5515/KJKIEES.2018.29.12.915

Stacked Slot Patch Antenna for Wireless Sensors Embedded in Concrete  

Lee, Jae-Hyuk (Department of Electronic Engineering, Ajou University)
Lee, Sung-Ho (SoC Platform Research Center, Korea Electronics Technology Institute)
Lee, Hai-Young (Department of Electronic Engineering, Ajou University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.29, no.12, 2018 , pp. 915-923 More about this Journal
Abstract
A concrete embedded antenna design is proposed for probing the durability of a building at an industrial scientific medical band of 902~908 MHz. The proposed antenna is designed with a stacked slot patch structure for lower impedance variation to a dielectric constant of concrete, as a dielectric constant difference is derived from the moisture content. The proposed structure has a wider bandwidth when a parasitic patch structure is used, which reduces antenna performance degradation resulting from the moisture content of concrete. The measured voltage standing wave ratio of the proposed structure is less than 2 and the beam width is approximately $80^{\circ}$, whereas the gain is greater than 7 dBi. The proposed antenna is fabricated with a rectangle-type concrete block, which is simulated and measured for return loss and antenna gain.
Keywords
Stacked Slot Patch; Parasitic Patch; Coupler; Embedded Concrete;
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