Measurements of the propagation of UHF radio waves on an underground railway train

Author

Zhang, Y.P. ; Jiang, Z.R. ; Ng, T.S. ; Sheng, J.H.

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

49

Issue

4

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

1342

Lastpage

1347

Abstract

Measurements of the natural propagation of UHF radio waves on an underground train are reported. Of prime interest are the natural propagation attenuation and the median signal level behavior. The propagation attenuation rates or the median signal level behaviors are found to correlate with the train carriages and frequency. On the front carriage, the propagation attenuation rate is 54 dB/100 m at 465 MHz and reduced to 21 dB/100 m at 820 MHz. However, on the rear carriage, it becomes 14.8 dB/100 m at 465 MHz and 7.8 dB/100 m at 820 MHz. It is shown that higher frequency is beneficial to the natural propagation and the train body greatly affects the natural propagation. Furthermore, the values of the path loss exponent are also given

Keywords

UHF radio propagation; electromagnetic wave absorption; electromagnetic wave scattering; land mobile radio; railways; 465 MHz; 820 MHz; UHF radio waves; attenuation; frequency; median signal level behavior; natural propagation; path loss exponent; propagation; train carriages; underground railway train; Antenna measurements; Antennas and propagation; Attenuation; Frequency; Line-of-sight propagation; Radio propagation; Rail transportation; UHF measurements; UHF propagation; Windows;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.875255

Filename

875255