Sensor array analyzer application data recovery

2017 6 28
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更新时间：2017 6 28
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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

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Honglei Chen
Honglei Chen 2017-6-28

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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

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fima v
fima v 2017-6-28
Hello, how can i test the feeding vector to see the stearing that it causes.
Honglei Chen
Honglei Chen 2017-6-28
You can run the following code
pattern(array,fc,-90:90,0,'Type','powerdb','Weights',w,...
'PropagationSpeed',3e8)
HTH
fima v
fima v 2017-6-28
编辑：fima v 2017-6-28
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);

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