Chapter2:ELECTROMAGNETIC PLANE WAVES

Ex2.6.5:pg-69

In [1]:
import math                               
#(a) Program to find gold-film surface resistance 
t=80*(10**(-10))                             #Film Thickness meter
o=4.1*(10**7)                                #Bulk conductivity in mhos/m                                                                                                                
p=570*(10**(-10))                            #Electron mean free path meter                                                                                                           
of=((3*t*o)/(4*p))*(0.4228 + math.log(p/t))  #the gold-film conductivity is of=(3*t*o/4*p)*(0.4228 + ln(p/t)) 
Rs=1/(t*of)                                  #the gold-film surface resistance is given by Rs=1/(t*of) in Ohms per square
print"The gold film surface resistance in Ohms per square is=",round(Rs,2),"Ohms/square"


#(b) Program to find the microwave attenuation 
Attenuation=40-20*log10(Rs)                  #Microwave attenuation  
print"Microwave Attenuation in db is=",int(Attenuation),"db"

#(c)Light transmittance T
print"The LIGHT TRANSMITTANCE T is estimated to be 75%"

#(d)light reflection loss R
print"The LIGHT REFLECTION LOSS R is about 25%"                                                             

The gold film surface resistance in Ohms per square is= 12.14 Ohms/square
Microwave Attenuation in db is= 18 db
The LIGHT TRANSMITTANCE T is estimated to be 75%
The LIGHT REFLECTION LOSS R is about 25%

Ex2.6.6:pg-74

In [2]:
              
import math                           
#(a) Program to find copper-film surface resistance 
t=60*(10**(-10))                             #Film Thickness meter
o=5.8*(10**7)                                #Bulk conductivity in mhos/m                                                                                                                 
p=420*(10**(-10))                            #Electron mean free path  in meter                                                                                                          
of=((3*t*o)/(4*p))*(0.4228 + math.log(p/t))  #the copper-film conductivity is of=(3*t*o/4*p)*(0.4228 + ln(p/t))
Rs=1/(t*of)                                  #the copper-film surface resistance is given by Rs=1/(t*of) in Ohms per square

print"The copper-film surface resistance in Ohms per square is=",round(Rs,2),"Ohms/square"


#(b) Program to find the microwave attenuation 

Attenuation=40-20*log10(Rs)                  #Microwave attenuation  

print"Microwave Attenuation in db is=",int(round(Attenuation)),"db"

#(c)Light transmittance T

print"The LIGHT TRANSMITTANCE T is estimated to be 82%"

#(d)light reflection loss R

print"The LIGHT REFLECTION LOSS R is about 18%"

The copper-film surface resistance in Ohms per square is= 11.32 Ohms/square
Microwave Attenuation in db is= 19 db
The LIGHT TRANSMITTANCE T is estimated to be 82%
The LIGHT REFLECTION LOSS R is about 18%