Complex permittivity measurements of steel fiber-reinforced cementitious composites using a free-space reflection method with a focused beam lens horn antenna

Kyeongyong Cho; Sunghui Jo; Yeong Hoon Noh; Namkon Lee; Sungwook Kim; Jong Gwan Yook

doi:10.3390/s21237789

Complex permittivity measurements of steel fiber-reinforced cementitious composites using a free-space reflection method with a focused beam lens horn antenna

Kyeongyong Cho, Sunghui Jo, Yeong Hoon Noh, Namkon Lee, Sungwook Kim, Jong Gwan Yook

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

To measure the electromagnetic properties of steel fiber-reinforced concrete (SFRC) in the X-band, 1-port measurements were performed using a lens horn antenna in a free-space measurement system. Free-space 1-port calibration with translations of the position of the reflector regarding the characteristics of the focused beam lens horn antenna was applied. The intrinsic impedance and complex permittivity of the SFRC were obtained from the measured reflection characteristics. The steel fiber content increased and the electromagnetic properties of the SFRC gradually changed from a dielectric to a conductor, even in very low frequencies compared to the plasma frequencies of general metal, which are optical frequencies. This is considered to be the plasmon effect of the metallic structure formed by the steel fiber. This result is applicable for analyses of the electromagnetic phenomenon of large structures with fiber content.

Original language	English
Article number	7789
Journal	Sensors
Volume	21
Issue number	23
DOIs	https://doi.org/10.3390/s21237789
Publication status	Published - 2021 Dec

Bibliographical note

Funding Information:
This research was supported by a grant (21SCIP-B146646-04) from the Construction Technology Research Project funded by the Ministry of Land, Infrastructure and Transport of the Korean Government.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

Analytical Chemistry
Information Systems
Biochemistry
Atomic and Molecular Physics, and Optics
Instrumentation
Electrical and Electronic Engineering

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10.3390/s21237789

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title = "Complex permittivity measurements of steel fiber-reinforced cementitious composites using a free-space reflection method with a focused beam lens horn antenna",

abstract = "To measure the electromagnetic properties of steel fiber-reinforced concrete (SFRC) in the X-band, 1-port measurements were performed using a lens horn antenna in a free-space measurement system. Free-space 1-port calibration with translations of the position of the reflector regarding the characteristics of the focused beam lens horn antenna was applied. The intrinsic impedance and complex permittivity of the SFRC were obtained from the measured reflection characteristics. The steel fiber content increased and the electromagnetic properties of the SFRC gradually changed from a dielectric to a conductor, even in very low frequencies compared to the plasma frequencies of general metal, which are optical frequencies. This is considered to be the plasmon effect of the metallic structure formed by the steel fiber. This result is applicable for analyses of the electromagnetic phenomenon of large structures with fiber content.",

author = "Kyeongyong Cho and Sunghui Jo and Noh, {Yeong Hoon} and Namkon Lee and Sungwook Kim and Yook, {Jong Gwan}",

note = "Funding Information: This research was supported by a grant (21SCIP-B146646-04) from the Construction Technology Research Project funded by the Ministry of Land, Infrastructure and Transport of the Korean Government. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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AU - Cho, Kyeongyong

AU - Jo, Sunghui

AU - Noh, Yeong Hoon

AU - Lee, Namkon

AU - Kim, Sungwook

AU - Yook, Jong Gwan

N1 - Funding Information: This research was supported by a grant (21SCIP-B146646-04) from the Construction Technology Research Project funded by the Ministry of Land, Infrastructure and Transport of the Korean Government. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/12

Y1 - 2021/12

N2 - To measure the electromagnetic properties of steel fiber-reinforced concrete (SFRC) in the X-band, 1-port measurements were performed using a lens horn antenna in a free-space measurement system. Free-space 1-port calibration with translations of the position of the reflector regarding the characteristics of the focused beam lens horn antenna was applied. The intrinsic impedance and complex permittivity of the SFRC were obtained from the measured reflection characteristics. The steel fiber content increased and the electromagnetic properties of the SFRC gradually changed from a dielectric to a conductor, even in very low frequencies compared to the plasma frequencies of general metal, which are optical frequencies. This is considered to be the plasmon effect of the metallic structure formed by the steel fiber. This result is applicable for analyses of the electromagnetic phenomenon of large structures with fiber content.

AB - To measure the electromagnetic properties of steel fiber-reinforced concrete (SFRC) in the X-band, 1-port measurements were performed using a lens horn antenna in a free-space measurement system. Free-space 1-port calibration with translations of the position of the reflector regarding the characteristics of the focused beam lens horn antenna was applied. The intrinsic impedance and complex permittivity of the SFRC were obtained from the measured reflection characteristics. The steel fiber content increased and the electromagnetic properties of the SFRC gradually changed from a dielectric to a conductor, even in very low frequencies compared to the plasma frequencies of general metal, which are optical frequencies. This is considered to be the plasmon effect of the metallic structure formed by the steel fiber. This result is applicable for analyses of the electromagnetic phenomenon of large structures with fiber content.

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Complex permittivity measurements of steel fiber-reinforced cementitious composites using a free-space reflection method with a focused beam lens horn antenna

Abstract

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