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Metamaterial absorbers for 24-GHz automotive radar applications

Title
Metamaterial absorbers for 24-GHz automotive radar applications
Author
최재훈
Keywords
Metamaterials; electromagnetic wave absorption; automotive electronics; FWHM
Issue Date
2017-04
Publisher
TAYLOR & FRANCIS LTD
Citation
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, v. 31, no. 6, page. 577-593
Abstract
Absorbers for automotive radar applications must satisfy some requirements such as a wide incident angle, polarization insensitivity, flexibility, low-profile structure, and low cost. To satisfy these requirements, we propose two types of metamaterial absorber for a 24-GHz automotive radar system. The first absorber is composed of 60x60 equally spaced unit cells with an electric LC resonator, a substrate, and a ground sheet. It has a peak absorptivity of 99.7% at 24.1GHz and total full-width at half-maximum (FWHM) of 1.0GHz. To increase the FWHM, a bandwidth-enhanced absorber was designed by arranging the unit cells into an optimized offset sub-array structure. The proposed absorber exhibited peaks at 24.1 and 25.2GHz with absorptivities of 97.8 and 74.5%, respectively. The FWHM improved by 900MHz compared with that of an equally spaced absorber. The measured results of the fabricated absorbers agreed well with the simulated ones.
URI
https://www.tandfonline.com/doi/abs/10.1080/09205071.2017.1297257?journalCode=tewa20https://repository.hanyang.ac.kr/handle/20.500.11754/113708
ISSN
0920-5071; 1569-3937
DOI
10.1080/09205071.2017.1297257
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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