Fluidically Reconfigurable Multifunctional Frequency-Selective Surface With Miniaturization Characteristic
- Authors
- Ghosh, Saptarshi; Lim, Sungjoon
- Issue Date
- Aug-2018
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Frequency-selective surface (FSS); liquid-metal alloy; microfluidic technology; multifunctional; reconfigurable structures
- Citation
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.66, no.8, pp 3857 - 3865
- Pages
- 9
- Journal Title
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
- Volume
- 66
- Number
- 8
- Start Page
- 3857
- End Page
- 3865
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/1919
- DOI
- 10.1109/TMTT.2018.2829195
- ISSN
- 0018-9480
1557-9670
- Abstract
- This paper presents a multifunctional reconfigurable frequency-selective surface (FSS) based on liquid-metal-filled microchannels engraved in an elastomeric substrate. The proposed FSS comprises two layers of periodic meandered patterns encased within the opposite sides of a dielectric, where the layers are arranged in orthogonal polarization with independent control of reconfigurability. The novelty of the design lies in its switching characteristic between four different working states (dual-polarized all pass, single-polarized low pass, single-polarized bandpass, and dual-polarized bandpass) with the injection of a liquid metal in the top and bottom microchannels. Moreover, the design exhibits miniaturization performance during one of the states (exhibiting dual-polarized bandpass response at 1.58 GHz) corresponding to the unit cell dimensions of 0.052 lambda(0) x 0.052 lambda(0). The equivalent circuit models and parametric variations are extensively analyzed for understanding the design principles. Because any liquid-metal-based reconfigurable FSS structure has not been reported earlier, a detailed description of the fabrication and measurement procedure are presented in this paper. The experimental validation of the fabricated prototype also confirms the potential use of microfluidic technology-based reconfigurable structures in future.
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