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Reconfigurable Nested Ring-Split Ring Transmitarray Unit Cell Employing the Element Rotation Method by Microfluidics
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Date
2015-03-01
Author
Erdil, Emre
TOPALLI, KAĞAN
Esmaeilzad, Nasim S.
Zorlu, Ozge
Külah, Haluk
Aydın Çivi, Hatice Özlem
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A continuously tunable, circularly polarized X-band microfluidic transmitarray unit cell employing the element rotation method is designed and fabricated. The unit cell comprises a double layer nested ringsplit ring structure realized as microfluidic channels embedded in Polydimethylsiloxane (PDMS) using soft lithography techniques. Conductive regions of the rings are formed by injecting a liquid metal (an alloy of Ga, In, and Sn), whereas the split region is air. Movement of the liquid metal together with the split around the ring provides 360 linear phase shift range in the transmitted field through the unit cell. A circularly polarized unit cell is designed to operate at 8.8 GHz, satisfying the necessary phase shifting conditions provided by the element rotation method. Unit cell prototypes are fabricated and the proposed concept is verified by the measurements using waveguide simulator method, within the frequency range of 8-10 GHz. The agreement between the simulation and measurement results is satisfactory, illustrating the viability of the approach to be used in reconfigurable antennas and antenna arrays.
Subject Keywords
Beam steering
,
Circularly polarized
,
Element rotation method
,
Lens array
,
Liquid metal
,
Microfluidics
,
Reconfigurable
,
Split ring
,
Transmitarray
URI
https://hdl.handle.net/11511/35098
Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
DOI
https://doi.org/10.1109/tap.2014.2387424
Collections
Department of Electrical and Electronics Engineering, Article
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A Reconfigurable Nested Ring-Split Ring Transmitarray Unit Cell by Microfluidic Technology
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This thesis presents design, fabrication and measurement of a novel, continuously tunable, circularly polarized X-band microfluidic transmitarray unit cell. To the author’s knowledge, this is the first study in the literature where a microfluidics approach is used to tune the phase of the transmitted field through the unit cell by the element rotation method. Furthermore, the generalized transmitarray design conditions necessary to utilize the element rotation method are derived. To implement the novel micr...
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E. Erdil, K. TOPALLI, N. S. Esmaeilzad, O. Zorlu, H. Külah, and H. Ö. Aydın Çivi, “Reconfigurable Nested Ring-Split Ring Transmitarray Unit Cell Employing the Element Rotation Method by Microfluidics,”
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
, pp. 1164–1169, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35098.