| ชื่อเรื่อง | : | Radio propagation at 900 MHz in underground coal mines |
| นักวิจัย | : | Zhang, Yue Ping , Zheng, Guo Xin , Sheng, J. H. |
| คำค้น | : | DRNTU::Engineering::Electrical and electronic engineering. |
| หน่วยงาน | : | Nanyang Technological University, Singapore |
| ผู้ร่วมงาน | : | - |
| ปีพิมพ์ | : | 2544 |
| อ้างอิง | : | Zhang, Y. P., Zheng, G. X., & Sheng, J. X. (2001). Radio propagation at 900 MHz in underground coal mines. Antennas and Propagation, IEEE Transactions on Antennas and Propagation, 49(5), 757-762. , 0018-926X , http://hdl.handle.net/10220/4684 , http://dx.doi.org/10.1109/8.929630 |
| ที่มา | : | - |
| ความเชี่ยวชาญ | : | - |
| ความสัมพันธ์ | : | IEEE transactions on antennas and propagation |
| ขอบเขตของเนื้อหา | : | - |
| บทคัดย่อ/คำอธิบาย | : | 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 freespace 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. |
| บรรณานุกรม | : |
Zhang, Yue Ping , Zheng, Guo Xin , Sheng, J. H. . (2544). Radio propagation at 900 MHz in underground coal mines.
กรุงเทพมหานคร : Nanyang Technological University, Singapore. Zhang, Yue Ping , Zheng, Guo Xin , Sheng, J. H. . 2544. "Radio propagation at 900 MHz in underground coal mines".
กรุงเทพมหานคร : Nanyang Technological University, Singapore. Zhang, Yue Ping , Zheng, Guo Xin , Sheng, J. H. . "Radio propagation at 900 MHz in underground coal mines."
กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2544. Print. Zhang, Yue Ping , Zheng, Guo Xin , Sheng, J. H. . Radio propagation at 900 MHz in underground coal mines. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2544.
|
