Title :
Radio propagation at 900 MHz in underground coal mines
Author :
Zhang, Y.P. ; Zheng, G.X. ; Sheng, J.H.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
fDate :
5/1/2001 12:00:00 AM
Abstract :
This paper reports on experimental results of radio propagation in two underground coal mines. Measurements were performed at 900 MHz on horizontal and vertical polarization in typical coal mine operational zones. Values of propagation loss in dB/100 m are derived. Additional losses due to coal mine curvatures and common coal mining equipment obstructions are also presented. A hybrid tunnel propagation model consisting of the free space propagation model and the modified waveguide propagation model is used to explain some measurement results. Based on these results, we believe that microcellular radio communications systems are feasible in coal mines
Keywords :
UHF radio propagation; coal; electromagnetic wave absorption; electromagnetic wave polarisation; losses; microcellular radio; mining; 900 MHz; UHF; coal mine curvatures; coal mining equipment obstructions; free space propagation model; horizontal polarization; hybrid tunnel propagation model; microcellular radio communications systems; modified waveguide propagation model; personal communications; propagation loss; radio propagation; underground coal mines; vertical polarization; Area measurement; Frequency measurement; Mining equipment; Performance evaluation; Polarization; Propagation losses; Radio communication; Radio propagation; Space technology; Urban areas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
