Question

Asked Dec 18, 2019

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MATLAB code with output- Refer Book Electromagnetic theory by Mathew. N.O. Sadiku-7th edition - Chapter 13-Problem 13.39

Step 1

In this case, the group pattern of the array of isotropic elements is given as

Step 2

The corresponding MATLAB code explaining all the necessary steps to plot the group pattern is given below:

**psi=0:0.0001:180; %creates a vector psi with the angular values between 0 and 180 with spacing of 0.0001**

**%the group pattern comprises of 3 different terms**

**%the three terms are constructed in g, m and n**

**g=sin(2*pi*cos(psi)); **

**m=sin((pi/2)*cos(psi));**

**n=cos((pi/2)*cos(psi)).^2;**

**F_psi=abs((g/m)*n); %abs stands for absolute value of magnitude in MATLAB**

**plot(psi,F_psi) %this plots the graph of F_psi v/s psi. **

**title('Plot of Group Pattern')**

**xlabel('Angle in degree')**

**ylabel('Amplitude')**

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