Replace existing data with new data for animation
p — Polar plot
Polar plot, specified as a scalar handle.
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
2and greater are independent data sets.
A complex vector or matrix, where
datacontains Cartesian coordinates ((x,y) of each point. x contains the real part of
dataand y contains the imaginary part of
When data is in a logarithmic form such as dB, magnitude values
can be negative. In this case,
the lowest magnitude values at the origin of the polar plot and highest
magnitude values at the maximum radius.
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.
Replace Existing Polar Plot Data For Animation
Create a helix antenna that has a 28 mm radius, a 1.2 mm width, and 4 turns. Plot 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); P = polarpattern(H);
Create a dipole antenna and calculate its directivity at 270 MHz.
d = dipole; D = pattern(d,270e6,0,0:1:360);
Replace the existing polar plot of the helix antenna with the directivity of the dipole using the
Animate Using Cavity Data
Create a default dipole antenna and plot the polar pattern of its directivity at 1 GHz.
d = dipole; D = pattern(d,75e6,0,0:1:360); P = polarpattern(D);
Create a default cavity antenna. Calculate the directivity of the antenna and write the data to
cavity.pln using the
c = cavity; msiwrite(c,2.8e9,'cavity','Name','Cavity Antenna Specifications');
Read the cavity specifications file into
Optional structures using the
Horizontal = struct with fields: PhysicalQuantity: 'Gain' Magnitude: [360x1 double] Units: 'dBi' Azimuth: [360x1 double] Elevation: 0 Frequency: 2.8000e+09 Slice: 'Elevation'
Vertical = struct with fields: PhysicalQuantity: 'Gain' Magnitude: [360x1 double] Units: 'dBi' Azimuth: 0 Elevation: [360x1 double] Frequency: 2.8000e+09 Slice: 'Azimuth'
optional = struct with fields: name: 'Cavity Antenna Specifications' frequency: 2.8000e+09 gain: [1x1 struct]
Replace data from the dipole antenna with data from cavity antenna.