I get this error: Incorrect number or types of inputs or outputs for function 'phaseShift' when I try to compile my code.

Hi everyone. Could someone please explain what could be the cause of this error when I use the phaseShift function. Many thanks in advance.

%%Create Variables
clc
clear all
close all

freq    = 5.33e9;
c       = physconst("lightspeed");
lambda  = c/freq;

%%Create pcbStack object
pcbobj  = pcbStack;

%%Create board shape
    %Creating BoardShape metal layer.
        %Creating Rectangle shape.
        Rectangle         = antenna.Rectangle;
        Rectangle.Name    = "Rectangle";
        Rectangle.Center  = [0 0];
        Rectangle.Length  = 0.02725;
        Rectangle.Width   = 0.02725;
        Rectangle         = rotate(Rectangle,0,[Rectangle.Center,-1],[Rectangle.Center,1]);
    BoardShape            = Rectangle;
pcbobj.BoardShape         = BoardShape;

%%Create Stackup
    %Creating PatchLayer metal layer.
        %Creating Patch shape.
        Patch             = antenna.Polygon;
        Patch.Name        = "Patch";
        Patch.Vertices    = [
        -0.00775 0.0064 0;
        0.00775 0.0064 0;
        0.00775 -0.0064 0;
        0.000535 -0.0064 0;
        0.000535 -0.0015 0;
        0.000375 -0.0015 0;
        0.000375 -0.013625 0;
        -0.000375 -0.013625 0;
        -0.000375 -0.0015 0;
        -0.000535 -0.0015 0;
        -0.000535 -0.0064 0;
        -0.00775 -0.0064 0];

        Patch         = rotate(Patch,0,[0 -0.00430416666666667 -1],[0 -0.00430416666666667 1]);
    PatchLayer        = Patch;
    %Creating DielectricLayer dielectric layer.
    DielectricLayer   = dielectric("Name",'Custom',"EpsilonR",4.66,"LossTangent",0.026,"Thickness",0.0006);
    %Creating GroundPlane metal layer.
        %Creating Ground shape.
        Ground = antenna.Rectangle;
        Ground.Name   = "Ground";
        Ground.Center = [0 0];
        Ground.Length = 0.02725;
        Ground.Width  = 0.02725;
        Ground        = rotate(Ground,0,[Ground.Center,-1],[Ground.Center,1]);
    GroundPlane       = Ground;

%%Create Feed
% feedloc = [[0 -0.006237 3 1];...
%     ];
feedloc = [[0 -0.0064 3 1];...
    ];

%%Create Metal
metalobj              = metal;
metalobj.Name         = 'Copper';
metalobj.Conductivity = 5.96e7;
metalobj.Thickness    = 35e-6;
pcbobj.Conductor      = metalobj;

%%Assign propertie
pcbobj.BoardThickness = 0.00053;
pcbobj.Layers         = {PatchLayer,DielectricLayer,GroundPlane,};
pcbobj.FeedLocations  = feedloc;
pcbobj.FeedDiameter   = 0.00030672;
pcbobj.ViaDiameter    = 0.00075;
pcbobj.FeedViaModel   = 'strip';
pcbobj.FeedVoltage    = 1;
pcbobj.FeedPhase      = 0;

figure('Position', [100 750 600 500]); 
show(pcbobj)

figure('Position', [700 750 600 500]); 
pattern(pcbobj,freq)

figure('Position', [1300 750 600 500]);
current(pcbobj,freq)


% antennaArray               = rectangularArray;
antennaArray                 = phased.URA;
antennaArray.Element         = pcbobj;
antennaArray.Size            = [10 10];
antennaArray.ElementSpacing  = lambda/2;
antennaArray.Lattice         = "Rectangular";
antennaArray.ArrayNormal     = "x";

figure('Position', [100 150 600 500]);
pattern(antennaArray, freq)

pos_rec     = getElementPosition(antennaArray);
pos_yx_rec  = pos_rec([2,3],:);

figure('Position', [700 150 600 500]);
plot(pos_yx_rec(1,:), pos_yx_rec(2,:), '.', 'MarkerSize', 10)
% axis([-0.2 0.2 -0.2 0.2])
xlabel('x'); ylabel('y')
title('Rectangular Lattice')

figure('Position', [1300 150 600 500]);
az_angle      = -180:0.25:180;
pattern(antennaArray,freq, az_angle, 0, CoordinateSystem="rectangular")
axis([-90 90 -35 25])

ps = phaseShift(antennaArray, freq, [30 45]);

Answer 1

[Sarthak]

Hi Dmitry,

I faced the same issue as well. I think the phaseShift function cannot take an array of type phased.URA. Can you try using a regular rectangularArray?

I used an example from the documentation:

% Works
a = rectangularArray('Size',[3 3]);
ps = phaseShift(a,1.8e9,[30 45])

ps = 9x1

38.8723 127.2803 215.6883 271.5920 0 88.4080 144.3117 232.7197 321.1277

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However,

% Doesn't work
array = phased.URA('Size',[3 3]);
ps = phaseShift(array,1.8e9,[30 45])

Incorrect number or types of inputs or outputs for function phaseShift.

Not sure if this is the expected behavior, but worked for me.

Cheers!

[Dmitry Ilinsky]

Hello Sarthak,

Thank you very much for your reply.

Yes, I have tried using the rectangularArray function. But in my case I have to use patchMicrostripInsetfed function as element of array and I can't use a regular rectangularArray as Matlab also gives an error that I can't use this element type to create an array. So thats was a reason why i used phased.URA

% Doesn't work
antenna = patchMicrostripInsetfed;
antennaArray = rectangularArray;
antennaArray.Element = antenna;

Error using em.Array/setElementAsScalarHandle
patchMicrostripInsetfed as Element is not supported for Arrays.

Error in em.ArrayProp/set.Element (line 73)
setElementAsScalarHandle(obj,propVal,excludeClass1,excludeClass2);

% It's ok
antenna = patchMicrostripInsetfed;
antennaArray = phased.URA;
antennaArray.Element = antenna;

Perhaps there is some other function for phase shifting so I can use it in conjunction with phased.URA?

Anyway, thanks again and good luck.

[Sarthak]

This should not be the case or maybe we are doing something incorrect. On the documentation it mentions that the "Element" can be an antenna object and "The antenna object can be an element from the Antenna Catalog".

https://www.mathworks.com/help/antenna/gs/antenna-catalog-elements.html

And in the Antenna Catalog the patchMicrostripInsertfed is present so ideally this error shouldn't come up.

[Dmitry Ilinsky]

Could the problem be that the default antenna inset fed is pointing parallel to the x-axis instead of perpendicular? Perhaps it needs to be rotated?

antenna = patchMicrostripInsetfed;
show(antenna)

[Dmitry Ilinsky]

Rotating didn't help. Same error

antenna = patchMicrostripInsetfed;
antenna.Tilt = 90;
antenna.TiltAxis = [0 0 1];
show(antenna)

antennaArray = rectangularArray;
antennaArray.Element = antenna;

Error using em.Array/setElementAsScalarHandle
patchMicrostripInsetfed as Element is not supported for Arrays.

Error in em.ArrayProp/set.Element (line 73)
setElementAsScalarHandle(obj,propVal,excludeClass1,excludeClass2);