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Characterization of a Schottky Diode Rectenna for Millimeter Wave Power Beaming Using High Power Radiation Sources

100%
Etinger A., Pilossof M., Litvak B., Hardon D., Einat M., Kapilevich B., Pinhasi Y.
Acta Physica Polonica A
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2017
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vol. 131
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issue 5
1280-1284
EN
Two principal elements play a role in a wireless power beaming system: a high power radiation source as the transmitter and a rectifying antenna (rectenna) as an RF to DC converter at the receiving site. A millimeter wave power transmission is analyzed using transmission system and a W-band rectenna based on a low-barrier Schottky diode. A quasi-optical approach is presented here, using free-space Gaussian propagation and optical ABCD matrices for lenses. Experiments are made to estimate the optimal load resistance and power handling capability of a single rectifier. A low power W-band tunable solid-state source delivering 0.4 W CW power equipped by the focusing lenses is used to characterize the responsivity of the rectenna. A pulsed power gyrotron is used to identify the diode breakdown point. It was found that the RF-to-DC conversion efficiency corresponding to the optimal load of 200 Ω is about 20.5% while the maximum DC power converted by the diode with optimal load is about 15 mW before breakdown.
2
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Numerical Analysis of Metal-Cylinder-Based Microwave Plasma Module

51%
Sobański M., Jasiński M., Mizeraczyk J.
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vol. 125
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issue 6
1309-1312
EN
We present optimization of energy transfer in the waveguide-supplied metal-cylinder-based microwave plasma module with an inner cylindrical quartz tube. The construction of microwave plasma module is based on a WR 340 waveguide standard. Presented microwave plasma module operates at atmospheric pressure and frequency of 2.45 GHz. There is a reduced height section waveguide in microwave plasma module which provides local increase of the electric field in the plasma region. Microwave plasma module is terminated with a movable plunger which plays the role of the tuning element. Tuning characteristics of microwave plasma module are defined as the dependence of the P_{R}/P_{I} on the position l_{s} of the movable plunger, where P_{R} and P_{I} are the microwave power reflected and power incident, respectively. The powers P_{R} and P_{I} are measured in the input plane of microwave plasma module. The purpose of the presented optimization is to achieve P_{R} lower than 5% of P_{I} in widest range of position of movable plunger l_{s}. We used Comsol Multiphysics software to make numerical analysis which allows to optimize the parameters of microwave plasma module. Results of numerical analysis show that P_{R}/P_{I} is lower than 0.05 in a wide range of movable plunger position l_{s}.
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