The survey of EM radio wave in tunnel-An example of UHF radio wave and VHF radio wave communication in Freeway NO.5 Hsuehshan Tunnel
碩士 === 國立東華大學 === 電機工程學系 === 98 === The communication equipments that we use now, such as 2G, 3G mobile or GPS etc., it would be no signal inside the tunnel while the vehicle or train enters the tunnel. The huge soil stones and reinforced concrete of the sealed tunnels interfere the signal sources a...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/52382812675861627732 |