Premium
Calculation of radio loss in forest environments by an empirical formula
Author(s) -
Chen HsingYi,
Kuo YuYui
Publication year - 2001
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.10066
Subject(s) - dielectric , isotropy , microwave , tree canopy , dielectric loss , range (aeronautics) , constant (computer programming) , computational physics , mathematics , materials science , canopy , computer science , optics , engineering , physics , telecommunications , electrical engineering , geography , archaeology , composite material , programming language
This paper focuses on the calculation of radio loss in forest environments. In the study, an optimum four‐layered forest model is proposed for the calculation of radio loss in forest environments. This optimum four‐layered forest model is obtained by modifying a commonly used model consisting of homogeneous and isotropic dielectric layers placed over a conducting flat earth. The dielectric constant of tree trunks is obtained from published papers, and the equivalent dielectric constant of the tree canopy is calculated with the equivalent dielectric constant technique. After comparing the numerical results with those obtained from measurement data, it is found that there is good agreement between the numerical results and the measurement data. Based on the numerical results, an empirical formula is developed by using the least square curve‐fitting method. This empirical formula is suitable for the calculations of radio loss in forest environments in a frequency range of 1–100 GHz. This formula also provides a simple, fast, accurate, and inexpensive method for calculating the radio loss in forest environments. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 31: 474–480, 2001.