Study on a Microwave Power Transfer System to a Stratospheric Platform Airship

2018 ◽  
Author(s):  
Yuta Nakamoto ◽  
Naoki Shinohara
Keyword(s):  
Microwave Power ◽  
Transfer System ◽  
Power Transfer

scholarly journals Flat-topped beam forming experiment for microwave power transfer system to a vehicle roof

2015 ◽  
Vol 2 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Takaki Ishikawa ◽  
Naoki Shinohara
Keyword(s):  
Conversion Efficiency ◽  
Microwave Power ◽  
Power Level ◽  
Input Power ◽  
Beam Pattern ◽  
Antenna Element ◽  
Transfer System ◽  
Power Transfer ◽  
Phased Array Antenna ◽  
Transmitting Antenna

We proposed and examined a microwave power transfer system for electric vehicles (EVs). In this system, electricity is transmitted from a transmitting antenna over an EV to a receiving antenna on the roof of the EV. We used a rectenna to convert the received microwave power to direct current power. The conversion efficiency of a rectenna array is affected by the input power level distribution, and we have to form a flat-topped beam pattern to increase the conversion efficiency. We conducted an experiment to form a flat-topped beam pattern by using a phased array antenna. In this experiment, the output power of each antenna element is uniform and cannot be controlled independently. Hence, we controlled only the output phases of each antenna element and formed a flat-topped beam pattern. The distance between the transmitting antenna and the receiving area is 6.45 m, and the receiving area corresponds to a space in which the azimuth and elevation are in the range of −5°–5°.

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