Plot cosine pattern in polar coordinates Specify a cosine antenna pattern from 0° to 360° in azimuth at 0° elevation. Then, plot the antenna pattern using polarpattern.

Create the pattern.

az = [0:360];
a = abs(cosd(az));

Plot the polar pattern of the antenna for an azimuth cut at 0° elevation.

P = polarpattern(a,'TitleTopTextInterpreter','tex','TitleTop','Azimuth Cut (Elevation Angle = 0^{\circ})');

Replace this plot with a rotated cosine pattern.

a = abs(cosd(az + 30.0));
replace(P,a);

Create a 15-element ULA of cosine antennas with elements spaced one-half wavelength apart. Plot the directivity of the array at 20 GHz.

Note: This example runs only in R2016b or later. If you are using an earlier release, replace each call to the function with the equivalent step syntax. For example, replace myObject(x) with step(myObject,x).

fc = 20.0e9;
c = physconst('Lightspeed');
lam = c/fc;
angs = [-180:1:180];
antenna = phased.CosineAntennaElement('FrequencyRange',[1.0e9,100.0e9],...
    'CosinePower',[2.5 2.5]);
array = phased.ULA('Element',antenna,'NumElements',15,'ElementSpacing',lam/2);
a = pattern(array,fc,angs,0);
P = polarpattern(angs,a);

Then, steer the array to 45° and, using the replace method, replace the existing polar plot with the steered array directivity.

steervec = phased.SteeringVector('SensorArray',array,'PropagationSpeed',c,...
    'IncludeElementResponse',true);
sv = steervec(fc,[45;0]);
a1 = pattern(array,fc,angs,0,'Weights',sv);
replace(P,angs,a1);