Study on microwave power transfer to sensors in car engine compartment

Author

Goto, Hiromi ; Shinohara, Nobuhiro ; Mitani, Tomonori ; Dosho, Hiroyuki ; Mizuno, M.

Author_Institution

Res. Inst. for Sustainable Humansphere, Kyoto Univ., Uji, Japan

fYear

2014

fDate

8-9 May 2014

Firstpage

150

Lastpage

153

Abstract

In this study, we examined the microwave power transfer to sensors in car engine compartment. First, we calculated the transmission efficiency in free space. We changed a transmission distance, and confirmed a theoretical limit value of the transmission efficiency in free space. Second, we simulated the transmission efficiency using the cuboid engine compartment model. From simulation results, we confirmed that transmission efficiency was increased by the multiple reflections and that transmission efficiency was decreased by the engine between transmitting (Tx) and receiving (Rx) antennas. Finally, we simulated transmission efficiency using the real engine compartment model. Changing the direction of the antennas, and obtained 2.8% of the highest transmission efficiency in the required antenna position. In addition, changing the position of the Tx antenna, we obtained 7.2% of the highest transmission efficiency.

Keywords

electric sensing devices; engines; microwave power transmission; receiving antennas; transmitting antennas; Rx antennas; Tx antenna; antenna position; car engine compartment; cuboid engine compartment model; free space; microwave power transfer; multiple reflections; receiving antennas; sensors; transmission distance; transmission efficiency; transmitting antennas; Atmospheric modeling; Directive antennas; Engines; Microwave antennas; Microwave communication; Transmitting antennas; In-Vehicle Sensors; Microwave Power Transfer; Microwave Propagation;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Power Transfer Conference (WPTC), 2014 IEEE

Conference_Location

Jeju

Type

conf

DOI

10.1109/WPT.2014.6839588

Filename

6839588