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A mobile base station (BS) in an urban environment has a power per m2 measurement of 4 µW m-2 at a distance of 175m from the BS. Assuming the propagation follows the inverse fourth power law ) what is a reasonable value to assume at a distance of 350m from the BS? 

Tia

 Mar 11, 2019
 #1
avatar+17990 
+2

The REFLECTED wave decays by the 4th power....the transmitted wave at a distance only decays by the 2nd power....sooo

 

Power ~ k/x^2

4 uW/m^2 = k/175^2        4 (175^2) = k

?? = k/350^2

 

4(175^2) /(350^2)  = power at 350 = 1 uW/m^2

 

 

 

 

Fixed typos...Thanx Chris !    Answer not changed.....

 Mar 11, 2019
edited by ElectricPavlov  Mar 11, 2019
 #2
avatar+99441 
0

Two questions, EP [ since I don't know anything about this....]

 

What does  uW    represent???

 

Also...I guess the M62  is supposed to be M^2  ????

 

 

cool cool cool

CPhill  Mar 11, 2019
 #3
avatar+17990 
+1

Yah....you are correct...that was a typo surprise

 

uW = micro watt

ElectricPavlov  Mar 11, 2019
 #4
avatar+99441 
0

Thanks !!!!

 

 

cool cool cool

CPhill  Mar 11, 2019

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