DocumentCode
907915
Title
On the Attenuation of Monofilar and Bifilar Modes in Mine Tunnels (Short Papers)
Author
Mahmoud, Samir F.
Volume
22
Issue
9
fYear
1974
fDate
9/1/1974 12:00:00 AM
Firstpage
845
Lastpage
847
Abstract
The modal equations for both the monofilar and bifilar modes of a two open wire transmission line located in a waveguide model of a rectangular mine tunnel are derived by extending an earlier general analysis. Attenuation curves of both modes in the frequency range 200 kHz-200 MHz are presented for two distinct configurations of the transmission line that may be used in practice. It is demonstrated that the proximity of the Iossy tunnel wall tends to increase greatly the attenuation rate for the monofilar modes but has relatively little effect on the bifilar modes.
Keywords
Attenuation; Conductors; Dielectric losses; Equations; Frequency; Radio communication; Rectangular waveguides; Transmission lines; UHF propagation; Wire;
fLanguage
English
Journal_Title
Microwave Theory and Techniques, IEEE Transactions on
Publisher
ieee
ISSN
0018-9480
Type
jour
DOI
10.1109/TMTT.1974.1128359
Filename
1128359
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