Metamaterial absorbers for 24-GHz automotive radar applications
- Authors
- Tak, Jinpil; Jeong, Eun; Choi, Jaehoon
- Issue Date
- Apr-2017
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- Metamaterials; electromagnetic wave absorption; automotive electronics; FWHM
- Citation
- JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS, v.31, no.6, pp.577 - 593
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
- Volume
- 31
- Number
- 6
- Start Page
- 577
- End Page
- 593
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/20426
- DOI
- 10.1080/09205071.2017.1297257
- ISSN
- 0920-5071
- 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.
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