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|Title:||Interlayer tuning of X-band frequency-selective surface using liquid crystal|
|Citation:||2013 Asia-Pacific Microwave Conference Proceedings (APMC): pp.1118-1120|
|Series/Report no.:||Asia Pacific Microwave Conference-Proceedings|
|Conference Name:||Asia-Pacific Microwave Conference (2013 : Seoul, Korea)|
|Amir Ebrahimi, Pouria Yaghmaee, Withawat Withayachumnankul, Christophe Fumeaux, Said Al-Sarawi and Derek Abbott|
|Abstract:||In this paper, a new concept of a voltage-controlled tunable frequency-selective surface (FSS) is introduced based on liquid crystal technology. The designed FSS consists of two periodically patterned metallic layers, separated by a thin dielectric substrate. Tunability is achieved by integrating liquid crystal cells within the substrate for each unit cell, producing interlayer capacitors. By applying a bias voltage between the front and back metallic arrays, the anisotropy axis of the liquid crystal molecules can be re-oriented, and thus the effective relative permittivity of the liquid crystals can be modified to cause a frequency shift in transmission response. Electromagnetic simulations predict 5.6% of continuous frequency tuning for this multi-layer FSS.|
|Keywords:||Frequency-selective surface; liquid crystal; tunable; reconfigurable.|
|Appears in Collections:||Electrical and Electronic Engineering publications|
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