Sensor array analyzer application data recovery

Hello , in MATLAB there is an application Sensor array analyzer in which we can "stear" the main beam by a certain angle.like shown in the photo bellow

How can i see what input phases were used in order to created this angle stear?

Thanks

Answer 1

[Honglei Chen]

You can obtain the steering vector by constructing the following array based on your configuration

array = phased.URA('Element',phased.CosineAntennaElement('CosinePower',[2 2]),...
    'Size',[8 8],'ElementSpacing',[0.5 0.5]);
stv = phased.SteeringVector('SensorArray',array,'PropagationSpeed',3e8);
steerangle = [40;0];
fc = 3e8;
w = stv(fc,steerangle);

If you want the phase shift itself, you can just use

angle(w)

HTH

[fima v]

Hello, how can i test the feeding vector to see the stearing that it causes.

[Honglei Chen]

You can run the following code

pattern(array,fc,-90:90,0,'Type','powerdb','Weights',w,...
    'PropagationSpeed',3e8)

HTH

[fima v]

Hello,i have tried to implement what you said into my case as shown at the bottom, could you please say if the steering vector was prepared properly?

Thanks

 I  have 4X16 patch antenna array each two row is spaced 100mm
and each column is spaced 50 mm. The dimensions  of each patch is
as shown in the attached photo 
40mmX40mm.
 dielectric constant is 2.25 , height of dielectric is 1.6mm .
the code is as follows.

t = dielectric('Name','sub','EpsilonR',2.2,'LossTangent',0.002,... 'Thickness',1.6e-3);

pm = patchMicrostrip('Length',40e-3, 'Width',40e-3,'GroundPlaneLength',120e-3, 'GroundPlaneWidth',120e-3,'Substrate',t)

fmcwPatchArray = phased.URA; fmcwPatchArray.Element = pm; fmcwPatchArray.Size = [4 16];

fmcwPatchArray.ElementSpacing = [0.05 0.1];

stv = phased.SteeringVector('SensorArray',array,'PropagationSpeed', 3e8);

steerangle = [10;0];

fc = 2.4e9;

w = stv(fc,steerangle);

t=angle(w);