自由空间损耗公式

1、I=SG+PL+DGI=SG+PL+DGI = Antenna IsolationSG = Service Antenna Gain, in the direction of the Donor Antenna (Vertical Gain)DG = Donor Antenna Gain, in the direction of the Donor Antenna (Vertical Gain)VerticalVerticalPL = Path Loss,I.e.,the amount of attenuation due to the distance between the antenna

2、SeparationSeparationPLPL = = I-SG-DGI-SG-DG) ) Service Antenna: Gain (17dB) / Side Lobe Suppression at 90o (-40dB)Donor Antenna: Gain (20dB) / Side Lobe Suppression at 270o (-37dB)PCS Band / Repeater Gain (95dB)I = -95dBso, PL =: -95-(-23)-(-17) = -55dBSG = (17 - 40)DG = (20 - 37)1 meter: 38dB2 mete

3、rs: 44dB4 meters: 50dB8 8 metersmeters: : 56dB56dBso,so, 8 8 metermeter PassPass LossLoss16 meter: 62dB* 天线隔离度 = Gain + 15dB(about)* 垂直隔离度(dB) = 48 + 40Log(D/Wavelength)* 水平隔离度(dB) = 42 + 20Log(D/Wavelength)-(Gd+Gs)D = 施主天线与转发天线的隔离 ( Value : m )波长 ( Value : m )波长 = (3x108)/(fHz)Gd : Gain of Donor An

4、tenna at the Service Antenna(假设 16)GS : Gain of Service Antenna at the Donor Antenna (if 16)SG = Service Antenna Gain, in the direction of the Donor Antenna (Vertical Gain)DG = Donor Antenna Gain, in the direction of the Donor Antenna (Vertical Gain)PL = Path Loss,I.e.,the amount of attenuation due

5、to the distance between the antenna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+40.94a(h2)=(1.1log10fMHz-0.7)2(1.56log10fMHz0.8)=1.23CDMAGSMDCSLs(dB)F(M

6、Hz)D(Km)Ls(dB)F(MHz)D(Km)Ls(dB)4 41 1. .0 03 38508500.003160.003169 92 2. .0 00 09509501 19 97 7. .5 56 69 98 8. .0 03 39509502 29 98 8. .0 03 39509502 21 10 03 3. .5 58 81 10 00 0. .8 87 7878.49878.493 31 10 01 1. .5 55 59509503 31 10 07 7. .1 10 01 10 03 3. .3 37 7878.49878.494 41 10 04 4. .0 05 5

7、9509504 41 10 09 9. .6 60 01 10 05 5. .3 30 0878.49878.495 51 10 05 5. .9 98 89509505 51 11 11 1. .5 53 31 10 06 6. .8 89 9878.49878.496 61 10 07 7. .5 57 79509506 61 11 13 3. .1 12 21 10 08 8. .2 23 3878.49878.497 71 10 08 8. .9 91 19509507 71 11 14 4. .4 46 61 10 09 9. .3 39 9878.49878.498 81 11 1

8、0 0. .0 07 79509508 81 11 15 5. .6 62 21 11 10 0. .4 41 1878.49878.499 91 11 11 1. .0 09 99509509 91 11 16 6. .6 64 41 11 11 1. .3 32 2878.49878.4910101 11 12 2. .0 00 095095010101 11 17 7. .5 56 61 11 12 2. .1 15 5878.49878.4911111 11 12 2. .8 83 395095011111 11 18 8. .3 38 81 11 12 2. .9 91 1878.4

9、9878.4912121 11 13 3. .5 59 995095012121 11 19 9. .1 14 41 11 13 3. .6 60 0878.49878.4913131 11 14 4. .2 28 895095013131 11 19 9. .8 83 31 11 14 4. .2 25 5878.49878.4914141 11 14 4. .9 93 395095014141 12 20 0. .4 48 81 11 14 4. .8 85 5878.49878.4915151 11 15 5. .5 53 395095015151 12 21 1. .0 08 81 1

10、1 15 5. .4 41 1878.49878.4916161 11 16 6. .0 09 995095016161 12 21 1. .6 64 41 11 15 5. .9 93 3878.49878.4917171 11 16 6. .6 61 195095017171 12 22 2. .1 16 61 11 16 6. .4 43 3878.49878.4918181 11 17 7. .1 11 195095018181 12 22 2. .6 66 61 11 16 6. .9 90 0878.49878.4919191 11 17 7. .5 58 895095019191

11、 12 23 3. .1 13 31 11 17 7. .3 35 5878.49878.4920201 11 18 8. .0 03 395095020201 12 23 3. .5 58 83 31 1. .3 32 2878.49878.490.0010.0013 32 2. .0 00 09509500.0010.0013 37 7. .5 56 63 37 7. .3 35 5878.49878.490.0020.0023 38 8. .0 03 39509500.0020.0024 43 3. .5 58 84 40 0. .8 87 7878.49878.490.0030.003

12、4 41 1. .5 55 59509500.0030.0034 47 7. .1 10 04 43 3. .3 37 7878.49878.490.0040.0044 44 4. .0 05 59509500.0040.0044 49 9. .6 60 04 45 5. .3 30 0878.49878.490.0050.0054 45 5. .9 98 89509500.0050.0055 51 1. .5 53 34 46 6. .8 89 9878.49878.490.0060.0064 47 7. .5 57 79509500.0060.0065 53 3. .1 12 24 48

13、8. .2 23 3878.49878.490.0070.0074 48 8. .9 91 19509500.0070.0075 54 4. .4 46 64 49 9. .3 39 9878.49878.490.0080.0085 50 0. .0 07 79509500.0080.0085 55 5. .6 62 25 50 0. .4 41 1878.49878.490.0090.0095 51 1. .0 09 99509500.0090.0095 56 6. .6 64 45 51 1. .3 32 2878.49878.490.010.015 52 2. .0 00 0950950

14、0.010.015 57 7. .5 56 65 52 2. .1 15 5878.49878.490.0110.0115 52 2. .8 83 39509500.0110.0115 58 8. .3 38 85 52 2. .9 91 1878.49878.490.0120.0125 53 3. .5 59 99509500.0120.0125 59 9. .1 14 45 53 3. .6 60 0878.49878.490.0130.0135 54 4. .2 28 89509500.0130.0135 59 9. .8 83 35 54 4. .2 25 5878.49878.490

15、.0140.0145 54 4. .9 93 39509500.0140.0146 60 0. .4 48 85 54 4. .8 85 5878.49878.490.0150.0155 55 5. .5 53 39509500.0150.0156 61 1. .0 08 85 55 5. .4 41 1878.49878.490.0160.0165 56 6. .0 09 99509500.0160.0166 61 1. .6 64 45 55 5. .9 93 3878.49878.490.0170.0175 56 6. .6 61 19509500.0170.0176 62 2. .1

16、16 65 56 6. .4 43 3878.49878.490.0180.0185 57 7. .1 11 19509500.0180.0186 62 2. .6 66 65 56 6. .9 90 0878.49878.490.0190.0195 57 7. .5 58 89509500.0190.0196 63 3. .1 13 35 57 7. .3 35 5878.49878.490.020.025 58 8. .0 03 39509500.020.026 63 3. .5 58 86 60 0. .8 87 7878.49878.490.030.036 61 1. .5 55 59

17、509500.030.036 67 7. .1 10 06 63 3. .3 37 7878.49878.490.040.046 64 4. .0 05 59509500.040.046 69 9. .6 60 06 65 5. .3 30 0878.49878.490.050.056 65 5. .9 98 89509500.050.057 71 1. .5 53 36 66 6. .8 89 9878.49878.490.060.066 67 7. .5 57 79509500.060.067 73 3. .1 12 26 68 8. .2 23 3878.49878.490.070.07

18、6 68 8. .9 91 19509500.070.077 74 4. .4 46 66 69 9. .3 39 9878.49878.490.080.087 70 0. .0 07 79509500.080.087 75 5. .6 62 27 70 0. .4 41 1878.49878.490.090.097 71 1. .0 09 99509500.090.097 76 6. .6 64 47 71 1. .3 32 2878.49878.490.10.17 72 2. .0 00 09509500.10.17 77 7. .5 56 67 77 7. .3 35 5878.4987

19、8.490.20.27 78 8. .0 03 39509500.20.28 83 3. .5 58 88 80 0. .8 87 7878.49878.490.30.38 81 1. .5 55 59509500.30.38 87 7. .1 10 08 83 3. .3 37 7878.49878.490.40.48 84 4. .0 05 59509500.40.48 89 9. .6 60 08 85 5. .3 30 0878.49878.490.50.58 85 5. .9 98 89509500.50.59 91 1. .5 53 38 86 6. .8 89 9878.4987

20、8.490.60.68 87 7. .5 57 79509500.60.69 93 3. .1 12 28 88 8. .2 23 3878.49878.490.70.78 88 8. .9 91 19509500.70.79 94 4. .4 46 68 89 9. .3 39 9878.49878.490.80.89 90 0. .0 07 79509500.80.89 95 5. .6 62 29 90 0. .4 41 1878.49878.490.90.99 91 1. .0 09 99509500.90.99 96 6. .6 64 43GF(MHz)D(Km)Ls(dB)F(MH

21、z)D(Km)180018001 19 98 8. .8 89 9210021001 1180018002 21 10 04 4. .9 91 1210021002 2180018003 31 10 08 8. .4 44 4210021003 3180018004 41 11 10 0. .9 94 4210021004 4180018005 51 11 12 2. .8 87 7210021005 5180018006 61 11 14 4. .4 46 6210021006 6180018007 71 11 15 5. .8 80 0210021007 7180018008 81 11

22、16 6. .9 96 6210021008 8180018009 91 11 17 7. .9 98 8210021009 91800180010101 11 18 8. .8 89 92100210010101800180011111 11 19 9. .7 72 22100210011111800180012121 12 20 0. .4 48 82100210012121800180013131 12 21 1. .1 17 72100210013131800180014141 12 21 1. .8 82 22100210014141800180015151 12 22 2. .4

23、42 22100210015151800180016161 12 22 2. .9 98 82100210016161800180017171 12 23 3. .5 50 02100210017171800180018181 12 24 4. .0 00 02100210018181800180019191 12 24 4. .4 47 72100210019191800180020201 12 24 4. .9 91 1210021002020180018000.0010.0013 38 8. .8 89 9210021000.0010.001180018000.0020.0024 44

24、4. .9 91 1210021000.0020.002180018000.0030.0034 48 8. .4 44 4210021000.0030.003180018000.0040.0045 50 0. .9 94 4210021000.0040.004180018000.0050.0055 52 2. .8 87 7210021000.0050.005180018000.0060.0065 54 4. .4 46 6210021000.0060.006180018000.0070.0075 55 5. .8 80 0210021000.0070.007180018000.0080.00

25、85 56 6. .9 96 6210021000.0080.008180018000.0090.0095 57 7. .9 98 8210021000.0090.009180018000.010.015 58 8. .8 89 9210021000.010.01180018000.0110.0115 59 9. .7 72 2210021000.0110.011180018000.0120.0126 60 0. .4 48 8210021000.0120.012180018000.0130.0136 61 1. .1 17 7210021000.0130.013180018000.0140.

26、0146 61 1. .8 82 2210021000.0140.014180018000.0150.0156 62 2. .4 42 2210021000.0150.015DCS180018000.0160.0166 62 2. .9 98 8210021000.0160.016180018000.0170.0176 63 3. .5 50 0210021000.0170.017180018000.0180.0186 64 4. .0 00 0210021000.0180.018180018000.0190.0196 64 4. .4 47 7210021000.0190.019180018000.020.026 64 4. .9 91 1210021000.02