add
Add data to polar plot
Description
Examples
Add Data To Polar Plot
Create a helix antenna that has 28 mm radius, 1.2 mm width, and 4 turns. Calculate the directivity of the antenna at 1.8 GHz.
hx = helix(Radius=28e-3, Width=1.2e-3, Turns=4); H = pattern(hx,1.8e9,0,0:1:360);
Plot the polar pattern.
P = polarpattern(H);
Create a dipole antenna and calculate the directivity at 270 MHz.
d = dipole; D = pattern(d,270e6,0,0:1:360);
Add the directivity of the dipole to the existing polar plot of helix antenna.
add(P,D);
Add Angle and Magnitude Data to Polar Pattern
Create a dipole and plot the polar pattern of its directivity at a frequency of 75 MHz.
d = dipole; D = pattern(d,75e6,0,0:1:360); P = polarpattern(D);
Create a cavity antenna. Calculate the directivity of the antenna at 1 GHz. Write the directivity of the antenna to cavity.pln
using the msiwrite
function.
c = cavity; msiwrite(c,1e9,"cavity.pln", Name="Cavity Antenna Specifications");
Read the data from cavity.pln
to Horizontal
, Vertical
, and Optional
structures using the msiread
function.
[Horizontal,Vertical,Optional] = msiread("cavity.pln")
Horizontal = struct with fields:
PhysicalQuantity: 'Gain'
Magnitude: [360x1 double]
Units: 'dBi'
Azimuth: [360x1 double]
Elevation: 0
Frequency: 1.0000e+09
Slice: 'Elevation'
Vertical = struct with fields:
PhysicalQuantity: 'Gain'
Magnitude: [360x1 double]
Units: 'dBi'
Azimuth: 0
Elevation: [360x1 double]
Frequency: 1.0000e+09
Slice: 'Azimuth'
Optional = struct with fields:
name: 'Cavity Antenna Specifications'
frequency: 1.0000e+09
gain: [1x1 struct]
Add horizontal directivity data of the cavity antenna to the existing polar pattern of the dipole
add(P,Horizontal.Azimuth,Horizontal.Magnitude);
Input Arguments
p
— Polar plot
scalar handle
Polar plot, specified as a scalar handle.
Example: polarpattern
data
— Antenna or array data
real length-M vector | real M-by-N matrix | real N-D array | complex vector or matrix
Antenna or array data, specified as one of the following:
A real length-M vector, where M contains the magnitude values with angles assumed to be degrees.
A real M-by-N matrix, where M contains the magnitude values and N contains the independent data sets. Each column in the matrix has angles taken from the vector degrees. The set of each angle can vary for each column.
A real N-D array, where N is the number of dimensions. Arrays with dimensions
2
and greater are independent data sets.A complex vector or matrix, where
data
contains Cartesian coordinates ((x,y) of each point. x contains the real part ofdata
and y contains the imaginary part ofdata
.
When data is in a logarithmic form such as dB, magnitude values
can be negative. In this case,polarpattern
plots
the lowest magnitude values at the origin of the polar plot and highest
magnitude values at the maximum radius.
Example: pattern(dipole,70e6)
angle
— Set of angles
vector in degrees
Set of angles, specified as a vector in degrees.
magnitude
— Set of magnitude values
vector | matrix
Set of magnitude values, specified as a vector or a matrix. For a matrix of magnitude values, each column is an independent set of magnitude values and corresponds to the same set of angles.
Version History
Introduced in R2016a
See Also
addCursor
| animate
| createLabels
| findLobes
| replace
| showPeaksTable
| showSpan
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