自由空间损耗公式

此表为计算电磁波在自由空间传播时的损耗所用。希望对广大读者有用。

自由空间损耗 Ls=32.45+20Log10(FMHz)+20log10(DKm) Ls=92.45+20Log10(FGHz)+20log10(DKm)

垂直隔离度 LV=28+40log(d/波长)

L(dB)=69.55+77-13.82log10h1-a(h2)+(44.9-6.55log10h1)log10dkm-K2

K=4.78log (10fMHz)-18.33log10fMHz+40.94 a(h2)=(1.1log10fMHz-0.7)×2-(1.56log10fMHz-0.8)=1.23 CDMA GSM Ls(dB)41.03 98.03 100.87 103.37 105.30 106.89 108.23 109.39 110.41 111.32 112.15 112.91 113.60 114.25 114.85 115.41 115.93 116.43 116.90 117.35 31.32 37.35 40.87 43.37 45.30 46.89 48.23 49.39 50.41 51.32 52.15 52.91 53.60 54.25

F(MHz)850 950 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49

D(Km)0.00316 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0.011 0.012 0.013 0.014

Ls(dB)92.00 98.03 101.55 104.05 105.98 107.57 108.91 110.07 111.09 112.00 112.83 113.59 114.28 114.93 115.53 116.09 116.61 117.11 117.58 118.03 32.00 38.03 41.55 44.05 45.98 47.57 48.91 50.07 51.09 52.00 52.83 53.59 54.28 54.93

F(MHz)950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950

D(Km)1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0.011 0.012 0.013 0.014

自由空间损耗

垂直隔离度

Ls=32.45+20Log10(FMHz)+20log10(DKm)LV=28+40log(d/波长)

Ls=92.45+20Log10(FGHz)+20log10(DKm)

L(dB)=69.55+77-13.82log10h1-a(h2)+(44.9-6.55log10h1)log10dkm-KK=4.78log2(10fMHz)－18.33log10fMHz+40.94

a(h2)=(1.1log10fMHz-0.7)×2－(1.56log10fMHz－0.8)=1.23

CDMAGSM

此表为计算电磁波在自由空间传播时的损耗所用。希望对广大读者有用。

54.85 55.41 55.93 56.43 56.90 57.35 60.87 63.37 65.30 66.89 68.23 69.39 70.41 71.32 77.35 80.87 83.37 85.30 86.89 88.23 89.39 90.41

878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49 878.49

0.015 0.016 0.017 0.018 0.019 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

55.53 56.09 56.61 57.11 57.58 58.03 61.55 64.05 65.98 67.57 68.91 70.07 71.09 72.00 78.03 81.55 84.05 85.98 87.57 88.91 90.07 91.09

950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950 950

0.015 0.016 0.017 0.018 0.019 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

此表为计算电磁波在自由空间传播时的损耗所用。希望对广大读者有用。

DCS Ls(dB)97.56 103.58 107.10 109.60 111.53 113.12 114.46 115.62 116.64 117.56 118.38 119.14 119.83 120.48 121.08 121.64 122.16 122.66 123.13 123.58 37.56 43.58 47.10 49.60 51.53 53.12 54.46 55.62 56.64 57.56 58.38 59.14 59.83 60.48

3G D(Km)1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0.011 0.012 0.013 0.014

F(MHz)1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800

Ls(dB)98.89 104.91 108.44 110.94 112.87 114.46 115.80 116.96 117.98 118.89 119.72 120.48 121.17 121.82 122.42 122.98 123.50 124.00 124.47 124.91 38.89 44.91 48.44 50.94 52.87 54.46 55.80 56.96 57.98 58.89 59.72 60.48 61.17 61.82

F(MHz)2100 2100 2100 2100 2100 2100 2100 2100 21

00 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100

D(Km)1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0.001 0.002 0.003 0.004 0.005 0.006 0.007 0.008 0.009 0.01 0.011 0.012 0.013 0.014

DCS

3G

此表为计算电磁波在自由空间传播时的损耗所用。希望对广大读者有用。

61.08 61.64 62.16 62.66 63.13 63.58 67.10 69.60 71.53 73.12 74.46 75.62 76.64 77.56 83.58 87.10 89.60 91.53 93.12 94.46 95.62 96.64

1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800 1800

0.015 0.016 0.017 0.018 0.019 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

62.42 62.98 63.50 64.00 64.47 64.91 68.44 70.94 72.87 74.46 75.80 76.96 77.98 78.89 84.91 88.44 90.94 92.87 94.46 95.80 96.96 97.98

2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100 2100

0.015 0.016 0.017 0.018 0.019 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9