Zoned near-zero refractive index fishnet lens antenna: Steering millimeter waves

Journal Article · Fri Mar 28 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4869436· OSTI ID:22271317

Pacheco-Peña, V., E-mail: [e-mail]; Orazbayev, B., E-mail: [e-mail]; Beaskoetxea, U., E-mail: [e-mail]; Beruete, M., E-mail: [e-mail] ^[1]; Navarro-Cía, M., E-mail: [e-mail] ^[2]; Centre for Plasmonics and Metamaterials, Imperial College London, London SW7 2AZ ^[3]; Centre for Terahertz Science and Engineering, Imperial College London, London SW7 2AZ ^[3]

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1. TERALAB (MmW—THz—IR and Plasmonics Laboratory), Universidad Pública de Navarra, Campus Arrosadía, 31006 Pamplona (Spain)
2. Optical and Semiconductor Devices Group, Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2BT (United Kingdom)
3. (United Kingdom)

A zoned fishnet metamaterial lens is designed, fabricated, and experimentally demonstrated at millimeter wavelengths to work as a negative near-zero refractive index lens suitable for compact lens antenna configurations. At the design frequency f = 56.7 GHz (λ{sub 0} = 5.29 mm), the zoned fishnet metamaterial lens, designed to have a focal length FL = 9λ{sub 0}, exhibits a refractive index n = −0.25. The focusing performance of the diffractive optical element is briefly compared with that of a non-zoned fishnet metamaterial lens and an isotropic homogeneous zoned lens made of a material with the same refractive index. Experimental and numerically-computed radiation diagrams of the fabricated zoned lens are presented and compared in detail with that of a simulated non-zoned lens. Simulation and experimental results are in good agreement, demonstrating an enhancement generated by the zoned lens of 10.7 dB, corresponding to a gain of 12.26 dB. Moreover, beam steering capability of the structure by shifting the feeder on the xz-plane is demonstrated.

• OSTI ID: 22271317
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTENNAS
COMPARATIVE EVALUATIONS
COMPOSITE MATERIALS
COMPUTERIZED SIMULATION
CONFIGURATION
DESIGN
GAIN
LENSES
REFRACTIVE INDEX