In [2]:

```
from math import cos, pi, log10
#Variable declaration
delta = 1/20.0 #rms deviation (lambda)
#Calculations
del_phi = 4*pi*delta*180/pi #Phase error (degrees)
kg = cos(del_phi*pi/180)**2 #Gain-loss (unitless)
kg = 10*log10(kg) #Gain-loss (dB)
#Result
print "The gain reduction is", round(abs(kg),1), "dB"
```

In [4]:

```
from math import tan,pi, log10
#Variable declaration
del_phi = 36.0 #rms phase error (degrees)
n_irr = 100.0 #Number of irregularities
#Calculations
max_side = tan(del_phi*pi/180)**2
max_side = -10*log10(max_side)
#Maximum side-lobe level (dB)
ran_side = (1/n_irr)*tan(del_phi*pi/180)**2
ran_side = -10*log10(ran_side)
#Random side-lobe level (dB)
#Result
print "The maximum side lobe level from main lobe is", round(max_side,1),"dB"
print "The random side lobe level from main lobe is", round(ran_side,1),"dB"
```