FIGURE 3 Distance dependencies of the path loss (linear scale) Based on these data, cumulative probabilities of the path loss are derived in Fig. 4. The difference between these two probabilities is approximately 18 dB. This indicates that the radiowave exits from the house with an attenuation of approximately 18 dB and propagates with the same attenuation coefficient in distance as that for free space. FIGURE 4 Cumulative probabilities of measured path loss data 5 Building entry loss slant path measurements – 5.1 UHF satellite signal measurements (860 MHz 2.6 GHz) – Representative UHF satellite signal attenuation observed within rooms located near an exterior wall in timber-framed private homes is summarized in Table 1. For interior rooms, 0.6 dB must be added to the tabulated values. For timberframed buildings the attenuation shows little variation with weather or path elevation angle but, as the Table illustrates, there is a systematic variation with frequency, polarization, construction materials, insulation and position within the structure. Some aluminium-backed insulating and construction materials contribute up to 20 dB of loss. TABLE 1 UHF signal attenuation (dB) through timber-framed buildings* Frequency (MHz) and polarization Building condition (Horizontal: H, Vertical: V) Exterior Insulation 860 H 860 V 1 550 V 2 569 V (non-metallic type) Ceiling only 4.7 2.9 5.0 5.8 Wood siding Ceiling and wall 6.3 4.5 6.6 7.4 Brick veneer Ceiling only 5.9 4.1 6.2 7.0 Bricks Ceiling and wall 7.5 5.7 7.8 8.6 * The Table is for rooms located near to the exterior wall; for interior rooms, 0.6 dB should be added. 5.2 Slant-path measurements from towers or high rise buildings Measurements of building entry loss using 18 to 20 m towers to simulate a satellite transmitter were performed in the bands 700 MHz to 1.8 GHz and 500 MHz to 3 GHz to determine the mean loss and spatial variability in a variety of buildings. There are insufficient data to give precise prediction methods, but the data in Tables 2 to 3 are indicative.
FIGURE 3 Distance dependencies of the path loss (linear scale) Based on these data, cumulative probabilities of the path loss are derived in Fig. 4. The difference between these two probabilities is approximately 18 dB. This indicates that the radiowave exits from the house with an attenuation of approximately 18 dB and propagates with the same attenuation coefficient in distance as that for free space. FIGURE 4 Cumulative probabilities of measured path loss data 5 Building entry loss – slant path measurements 5.1 UHF satellite signal measurements (860 MHz – 2.6 GHz) Representative UHF satellite signal attenuation observed within rooms located near an exterior wall in timber-framed private homes is summarized in Table 1. For interior rooms, 0.6 dB must be added to the tabulated values. For timberframed buildings the attenuation shows little variation with weather or path elevation angle but, as the Table illustrates, there is a systematic variation with frequency, polarization, construction materials, insulation and position within the structure. Some aluminium-backed insulating and construction materials contribute up to 20 dB of loss. TABLE 1 UHF signal attenuation (dB) through timber-framed buildings* Building condition Frequency (MHz) and polarization (Horizontal: H, Vertical: V) Exterior Insulation (non-metallic type) 860 H 860 V 1 550 V 2 569 V Wood siding Ceiling only 4.7 2.9 5.0 5.8 Ceiling and wall 6.3 4.5 6.6 7.4 Brick veneer Ceiling only 5.9 4.1 6.2 7.0 Bricks Ceiling and wall 7.5 5.7 7.8 8.6 * The Table is for rooms located near to the exterior wall; for interior rooms, 0.6 dB should be added. 5.2 Slant-path measurements from towers or high rise buildings Measurements of building entry loss using 18 to 20 m towers to simulate a satellite transmitter were performed in the bands 700 MHz to 1.8 GHz and 500 MHz to 3 GHz to determine the mean loss and spatial variability in a variety of buildings. There are insufficient data to give precise prediction methods, but the data in Tables 2 to 3 are indicative.
R-REP-P.2346-2015-MSW-E.docx