Generating the gain values of a steered ULA

Hi all,

I'm just checking whether there's any way to get the gain values of a steered ULA.

i.e: I create a steerd array using following code

pattern(array,fc,-90:90,0,'PropagationSpeed',vp,'Type','powerdb','CoordinateSystem','polar','Weights',s_vec,'Normalize',false);

This will visualize the steered array and hovering the mouse, I can see the gain values. Now I need to print them in the code.

I tried to get the gain from a specific angle using following. Since I'm not providing the steering vector, I'm not getting the correct value I can see in the steered beams.

gain = phased.ArrayGain('SensorArray',array,'Weights',s_vec);
arraygain = gain(fc,[45;0]);
fprintf('%i\n', arraygain);

Is there any other ways of generating this.

Thanks a lot!

Answer 1

[Raghunathraju]

Hi,

As per my understanding, you want to get the gain values from the ‘pattern’ function of your code.

You can simply assign a variable to the pattern to get the gain values of your model.

You can refer to the below example,

c = physconst('LightSpeed');
fc = 3e8;
lambda = c/fc;
ang = [-30,-20,-10,0,10,20,30; 0,0,0,0,0,0,0];
myAnt1 = phased.IsotropicAntennaElement;
myArray1 = phased.ULA(10,lambda/2,'Element',myAnt1);
w = steervec(getElementPosition(myArray1)/lambda,[30;0]);
pattern(myArray1,fc,-90:90,0,'PropagationSpeed',c,'Type','powerdb','CoordinateSystem','polar','Weights',w,'Normalize',false);

% To generate Gain values
gainval=pattern(myArray1,fc,-90:90,0,'PropagationSpeed',c,'Type','powerdb','CoordinateSystem','polar','Weights',w,'Normalize',false)

gainval = 181×1

3.0103 3.0082 3.0016 2.9896 2.9708 2.9432 2.9040 2.8501 2.7776 2.6821

I hope this resolves your issue