How can i avoid the error coming when I am making some elements dead in an array in antenna toolbox in Matlab R2015a.???

I am using antenna toolbox to design a rectangular array. when I am going to make some element dead by making their feed to zero, an error comes as following. so please help me to avoid that error.

Code:

%%%J.M.T.&.M.+.MAA
clc
clear all
close all
d = dipole;
N = 5;
df = repmat(d,N)
r = rectangularArray('Element',df);
show(r)
S = [1:2:N*N];
for i = 1:25
    if any(S==i)
      r.Element(i).Tilt = 90;
    r.Element(i).TiltAxis = [0 1 0];
    end
end
figure;
show(r)
figure;
pattern(r,75e6)
Vfeed = ones(1,N*N)
Vfeed(S) = 0
r.AmplitudeTaper = Vfeed
figure
pattern(r,75e6)

Error:

Error using em.Array/set.AmplitudeTaper (line 125)
Expected input to be positive.

Error in paa_test4 (line 23)
r.AmplitudeTaper = Vfeed

Answer 1

[Vishwanath Iyer]

Hello Guruprasad,

In the R2015a release of Antenna Toolbox, it is not possible to set the AmplitudeTaper to zero. In the R2015b release however, this is possible.

As a workaround, try setting it to a really small value, e.g. 1e-16. So the following line would be: Vfeed(S) = 1e-16

Hope this helps.

Regards,

Vishwanath