The nano Rectenna Project
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The nano Rectenna Project
Project team: ! Prof. Yael Hanein
! Prof. Koby Scheuer
! Prof. Amir Boag
! Dr. Inbal Friedler
! Yuval Ifat
! Doron Bar-Lev
! Zeev Iluz
! Michal Eitan 2
The nano Rectenna Project
Outline ! The motivation: energy harvesting using optical
antennas
! Guidelines for efficient IR rectenna
! The Dual Vivaldi antenna geometry
! Antenna performance - simulation results
! Summary
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The nano Rectenna Project
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The motivation: energy harvesting using optical antennas ,*<!1BC4)&!/#48#**)!;<;8#-!D.&&!.*4&'+#E!
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The nano Rectenna Project
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Guidelines for efficient IR rectenna
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The nano Rectenna Project
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• Skin depth ~ 13 nm in IR band
• Antenna thickness > 40-50 nm 6
The nano Rectenna Project
The Dual Vivaldi antenna geometry
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The nano Rectenna Project
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The nano Rectenna Project
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The nano Rectenna Project
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The nano Rectenna Project
Dual Vivaldi Antenna: Simulation results
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The return loss > 9.5 dB between (129% impedance bandwidth).
0.7 3.25µm!
The nano Rectenna Project
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The nano Rectenna Project
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The nano Rectenna Project
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The nano Rectenna Project
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The radiation efficiency remains higher than 85% between (122% efficiency bandwidth). 0.78 3.23µm!
The nano Rectenna Project
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The radiation efficiency remains higher than 85% between (122% efficiency bandwidth). 0.78 3.23µm!
The nano Rectenna Project
Array configuration for Power harvesting
Series DC connection – no need for DC interconnects
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The nano Rectenna Project
Summary • Dual Vivaldi nano-antenna • Wideband both in terms of impedance matching and
radiation efficiency. • The high efficiency - concentration of the field in the gap
between the antenna terminals & gradual transition from the wave guiding to radiation.
• The broadside peak radiation - integration of dual Vivaldi antennas in planar configurations, using E-beam lithography process.
• The Dual Vivaldi antenna: fewer fabrication restrictions as compared to dipole and bow-tie antennas, especially in terms of the nano-gap size between the antenna terminals.
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