In [8]:

```
#Given
f=310.0*10**6
#Calculation
import math
len1 =(492*0.97)/f
len2 =(492/f)*0.8
len3 =(984/f)*0.73
z1 =120*log(35/2.0)
len4 =234/f
z2 = 73/2.0
#Result
print"(a) The length and radiation resistance of the dipole are ",round(len1*10**6,2),"feet and 73 ohm respectively"
print"(b) The length of the folded dipole are ",round(len2*10**6,2),"feet"
print"(c) The length and radiation resistance of the bow tie antenna are ",round(len3*10**6,1),"feet and ",round(z1,1),"ohm respectively"
print"(d) The length and radiation resistance of the groun plane antenna are ",round(len4*10**6,3),"feet and",z2,"ohmrespectively"
```

In [12]:

```
#Given
gain=14
len=250
attn_100=3.6
f =220*10
pin =50
p =0.126
#Calculation
pout =pin*p
line_loss =pin-pout
pwr_ratio = 25.1
ERP = pwr_ratio*pout
#Result
print"(a) The transmission line loss is ",line_loss
print"(b) Effective raduated power is ",round(ERP,1),"W"
```

In [13]:

```
#Given
Z0 =50
Zl =172
f =460.0*10**6
VF =0.86
#Calculation
len =(246/f)*VF
#Result
print"The length of the impedance matching section needed for the Q section is ",round(len*10**6,2),"feet"
```

In [14]:

```
#Given
f = 460.0*10**6
VF = 0.66
#Calculation
len = (246/f)*VF
#Result
print"The length of impedance matching section is ",round(len*10**6,3),"feet"
```

In [16]:

```
#Given
ht =275
hr =60
f=224.0*10**6
pt=100
Gt = 26
Gr = 3.27
#Calculation
D =((2*ht)**0.5+(2*hr)**0.5)*1.61
lamda = 300/f
Pr = (pt*Gt*Gr*lamda**2)/(16*3.14**2*D**2)
#Result
print"(a) The maximmum transmitting distance is ",round(D,1),"kilometer"
print"The received power is ",round(Pr*10**15,1),"nW"
```