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Analysis of Electro-magnetic Waves for the $815\~865MHz$ and $900\~950MHz$ Bands in a Cabin of Automobile  

Choe Gwangje (Department of Electrical Engineering, Halla University)
Jho Shigie (Department of Mechanical Engineering, Halla University)
Jeung Weolrark (Department of Mechanical Engineering, Halla University)
Jang Sungkuk (Department of Mechanical Engineering, Halla University)
Kang Shinhan (Department of Mechanical Engineering, Halla University)
Han Sangwhi (Mando Corporation Central R&D Center)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.14, no.1, 2006 , pp. 176-182 More about this Journal
Abstract
In this paper, we have measured the power of the electro-magnetic waves in the cabin of automobiles with automatic transmission or manual transmission. Measured frequency ranges are $815\~865MHz\;and\;900\~950MHz$. Experimental studies are conducted by measuring the radiated power of the frequency spectrum for above frequency bands. The $\lambda/2$ dipoles used for measurement are fabricated to comply with the COMMISSION DIRECTIVE 95/54/EC. Experimental results confirm that the level of radiated power in the cabin of automobile with automatic transmission is higher than that with manual transmission. The measured values are less than -85dBm for the manual transmission vehicles, but more than -79dBm for the automatic transmission vehicles.
Keywords
Electro-magnetic wave; dipole; Automatic transmission;
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