Electronically Switchable Broadband Metamaterial Absorberopen access
- Authors
- Lee, Dongju; Jeong, Heijun; Lim, Sungjoon
- Issue Date
- Jul-2017
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- SCIENTIFIC REPORTS, v.7, no.1
- Journal Title
- SCIENTIFIC REPORTS
- Volume
- 7
- Number
- 1
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/4222
- DOI
- 10.1038/s41598-017-05330-z
- ISSN
- 2045-2322
- Abstract
- In this study, the novel electronically switchable broadband metamaterial absorber, using a PIN diode, is proposed. The unit cell of the absorber was designed with a Jerusalem-cross resonator and an additive ring structure, based on the FR-4 dielectric substrate. Chip resistors and PIN diodes were used to provide both a broadband characteristic and a switching capability. To satisfy the polarization insensitivity, the unit cell was designed as a symmetrical structure, including the DC bias network, electronic devices, and conductor patterns. The performance of the proposed absorber was verified using full-wave simulation and measurements. When the PIN diode was in the ON state, the proposed absorber had a 90% absorption bandwidth from 8.45-9.3 GHz. Moreover, when the PIN diode was in the OFF state, the 90% absorption bandwidth was 9.2-10.45 GHz. Therefore, the absorption band was successfully switched between the low-frequency band and the high-frequency band as the PIN diode was switched between the ON and OFF states. Furthermore, the unit cell of the proposed absorber was designed as a symmetrical structure, and its performance showed insensitivity with respect to the polarization angle.
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