TABLE 5 The effective height of the road, (heavy traffic) hs Frequency h1 hs (GHz) (m) (m) = 2.7 = 1.6 h2 h2 4 1.3 (2) 3.35 8 1.6 (2) 4 1.6 (2) 8.45 8 1.6 (2) 4 1.4 (2) 15.75 8 (1) (2) (1) The breakpoint is beyond 1 km. (2) No breakpoint exists. TABLE 6 The effective height of the road, (light traffic) hs Frequency h1 hs (GHz) (m) (m) = 2.7 = 1.6 h2 h2 4 0.59 0.23 3.35 8 (1) (1) 4 (2) 0.43 8.45 8 (2) (1) 4 (2) 0.74 15.75 8 (2) (1) (1) No measurements taken. (2) The breakpoint is beyond 1 km. When > the approximate values of the and lower bounds of basic transmission loss h1, h2 hs, for the SHF frequency band can be calculated using equations (2) and (4), with given by: Lbp (8) On the other hand, when or no breakpoint exists. When two terminals are close h1 hs h2 hs (d < the basic propagation loss is similar to that of the UHF range. When two terminals are far, Rs), the propagation characteristic is such that the attenuation coefficient is cubed. Therefore, the approximate lower bound for is given by: d Rs (9) The approximate upper bound for is given by: d Rs
TABLE 5 The effective height of the road, hs (heavy traffic) Frequency (GHz) h1 (m) hs (m) h2 = 2.7 h2 = 1.6 3.35 4 1.3 (2) 8 1.6 (2) 8.45 4 1.6 (2) 8 1.6 (2) 15.75 4 1.4 (2) 8 (1) (2) (1) The breakpoint is beyond 1 km. (2) No breakpoint exists. TABLE 6 The effective height of the road, hs (light traffic) Frequency (GHz) h1 (m) hs (m) h2 = 2.7 h2 = 1.6 3.35 4 0.59 0.23 8 (1) (1) 8.45 4 (2) 0.43 8 (2) (1) 15.75 4 (2) 0.74 8 (2) (1) (1) No measurements taken. (2) The breakpoint is beyond 1 km. When h1, h2 > hs, the approximate values of the and lower bounds of basic transmission loss for the SHF frequency band can be calculated using equations (2) and (4), with Lbp given by: (8) On the other hand, when h1 hs or h2 hs no breakpoint exists. When two terminals are close (d < Rs), the basic propagation loss is similar to that of the UHF range. When two terminals are far, the propagation characteristic is such that the attenuation coefficient is cubed. Therefore, the approximate lower bound for d Rs is given by: (9) The approximate upper bound for d Rs is given by:
R-REC-P.1411-9-201706-I!!MSW-E.docx