Planning a 5G Fixed Wireless Access Link over Terrain - Not run

Hi

I am running the original code of the MATLAB website

https://ch.mathworks.com/help/antenna/ug/planning-a-5G-fixed-wireless-access-link-over-terrain.html

And in the next part I get an error message:

% Design reflector-backed crossed dipole antenna
txElement = reflectorCrossedDipoleElement(fq); % this is not run

% Define array size
ntxrow = 8;
ntxcol = 12;

% Define element spacing
lambda = physconst("lightspeed")/fq;
drow = lambda/2;
dcol = lambda/2;

% Create 8-by-12 antenna array
tx.Antenna = phased.URA("Size",[ntxrow ntxcol], ...
    "Element",txElement, ...
    "ElementSpacing",[drow dcol]);

% Plot pattern on the map
pattern(tx)

Undefined function 'reflectorDipoleElement' for input

arguments of type 'double'.

Error in pop3 (line 60)

rxElement = reflectorDipoleElement(fq);

Am I missing TOOLBOX or why doesn't it work?

TNX

[Satyanand Singh]

function element = reflectorCrossedDipoleElement(fq, showAntenna)

%reflectorCrossedDipoleElement Design reflector-backed crossed dipole antenna element

if nargin < 2

showAntenna = false;

end

lambda = physconst("lightspeed")/fq;

offset = lambda/50;

gndspacing = lambda/4;

gndLength = lambda;

gndWidth = lambda;

% Design crossed dipole elements

d1 = design(dipole,fq);

d1.Tilt = [90,-45];

d1.TiltAxis = ["y","z"];

d2 = copy(d1);

d2.Tilt = 45;

d2.TiltAxis = "x";

% Design reflector

r = design(reflector,fq);

r.Exciter = d1;

r.GroundPlaneLength = gndLength;

r.GroundPlaneWidth = gndWidth;

r.Spacing = gndspacing;

r.Tilt = 90;

r.TiltAxis = "y";

if showAntenna

show(r)

end

% Form the crossed dipole backed by reflector

refarray = conformalArray;

refarray.ElementPosition(1,:) = [gndspacing 0 0];

refarray.ElementPosition(2,:) = [gndspacing+offset 0 0];

refarray.Element = {r, d2};

refarray.Reference = "feed";

refarray.PhaseShift = [0 90];

if showAntenna

show(refarray);

view(65,20)

end

% Create custom antenna element from pattern

[g,az,el] = pattern(refarray,fq);

element = phased.CustomAntennaElement;

element.AzimuthAngles = az;

element.ElevationAngles = el;

element.MagnitudePattern = g;

element.PhasePattern = zeros(size(g));

end

function element = reflectorDipoleElement(fq)

%reflectorDipoleElement Design reflector-backed dipole antenna element

% Design reflector and exciter, which is vertical dipole by default

element = design(reflector,fq);

element.Exciter = design(element.Exciter,fq);

% Tilt antenna element to radiate in xy-plane, with boresight along x-axis

element.Tilt = 90;

element.TiltAxis = "y";

element.Exciter.Tilt = 90;

element.Exciter.TiltAxis = "y";

end

Answer 1

[Abderrahim. B]

Hi!

reflectorDipoleElement is a function in your live script. Scroll down to the bottom of the script and see if it is there, maybe it has a different name!

Edit:

I have run the same example, and it worked for me. I am using MATLAB 2022A, latest update.

Some tips to fix the error:

• Check fq data type
• Do some debugging
• Check if you have antenna toolbox, and all the other required products

Hope this helps

[Shahar ben ezra]

@Issa tnx i check this