The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
권호 표지

Analysis of Radio-Wave Propagation Characteristics in Curved Tunnel

곡선 터널 내에서 전파특성 분석

  • Published : 2002.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we present the analysis of radio wave propagation characteristics in curved tunnels. Tunnel propagation models are performed in two cases which are using ray-tracing method for straight tunnels and geometrical optics extension to the standard hybrid waveguide model for curved ones. By regression analysis for measured power based on distance between the transmitter and the received antenna in tunnels that have 3.5 m $\times$ 6 m cross section and limited wall depth path loss are 0.19 dB/m for straight section and 0.68 dB/m for curved ones. By comparing model analysis with measurement in tunnels, it has been shown that the simulated results of tunnel propagation models are similar to the measured values.

터널 내 직선구간과 곡선구간에 대한 전파특성을 분석하였다. 전파특성 분석모델로는 직선구간에서는 Ray-tracing 기법을 사용하였고, 곡선구간에서는 혼합도파관 모드와 Geometrical Optic(GO)을 결합하여 해석하는 모델을 이용하였다. 단면적이 3.5 m $\times$ 6 m이고 , 벽치 두께가 유한한 구조의 터널 내 송ㆍ수신 안테나 사이의 거리에 따른 수신전력 측정값을 회귀 분석한 결과 직선구간의 경로손실은 0.19 dB/m이었고, 곡선구간의 경로손실은 0.68 dB/m이다. 터널 내 수신전력 측정값은 터널전파 모델의 시뮬레이션 결과와 잘 일치함을 알 수 있었다.

Keywords

References

  1. Microwave Engineering(Second Edition) David M. Pozar
  2. Antennas and Radiowave Propagation Robert E. Collin
  3. Electromagnetic Wave Propagation, Radiation, and Scattering Akira Ishimaru
  4. IEEE Trans. Antennas and Propagat. v.42 no.1 Theoretical and experimental approach of the propagation of high frequency waves in road tunnels Mariage;M. Lienard;P. Degauque https://doi.org/10.1109/8.272304
  5. IEEE Trans. Veh. Technol. v.50 no.3 Analysis of path loss and delay spread at 900 MHz and 2.1 GHz while entering tunnels Fernando Marti Pallares;Francisco J. Ponce Juan https://doi.org/10.1109/25.933311
  6. IEEE Trans. Veh. Technol. Waves Propagation in curved tunnels Martin Nilsson;Jesper Slettenmark;Claes Beckman
  7. IEEE VTC'99 Theoretical and experimental approach of the propagation at 2.5 GHz and 10 GHz in straight and curved tunnels M. Lienard;S. Betrencourt;P. Degauque
  8. IEEE Trans. ICPWC'2000 A ray-tracing method for predicting delay spread in tunnel environments Mohammad Haeri Kermani;Mahmuoud
  9. IEEE VTC '95 Radio propagation characteristics in subway platform and tunnel in 2.5 GHz bands Satoshi Shinozaki;Masami Wada;Akio Teranishi;Hiroshi Furukawa;Yoshihiko Akaiwa
  10. Characteristics of UHF radio propagation channel in curved tunnels Y. P. Zhang;Y. Hwang
  11. IEEE Trans. Antennas and Propagat v.14 no.1 Propagation characteristics of UHF simulcast signals in tunnel environments Y. P. Zhang;Y. Hwang;J. H. Sheng
  12. IEEE Trans. Antennas and Propagat. v.49 no.5 Radio propagation at 900MHz in underground coal mines Y. P. Zhang;G. X. Zheng;J. H. Zheng https://doi.org/10.1109/8.929630
  13. ITU-R Contribution Doc 3K/15-E Simplified reflection and transmission coefficient formulas for a multi-layered medium