期刊
APPLIED PHYSICS LETTERS
卷 102, 期 10, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4795787
关键词
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资金
- European Union (FP7) [300934]
- Swiss National Science Foundation (SNSF) [133583]
- Hasler Foundation [11149]
A tunable graphene-based reflective cell operating at THz is proposed for use in reconfigurable-beam reflectarrays, or similarly to implement the so-called generalized law of reflection. The change in the complex conductivity of graphene when biased by an electric field allows controlling the phase of the reflected field at each element of the array. Additionally, the slow wave propagation supported by graphene drastically reduces the dimensions of the cell, which allows smaller inter-element spacing hence better array performance. An elementary cell is optimized and its scattering parameters computed, demonstrating a dynamic phase range of 300 degrees and good loss figure for realistic chemical potential variations. Finally, a circuit model is proposed and shown to very accurately predict the element response. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4795787]
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