Axial ratio of antenna
ar = axialRatio(antenna,frequency,azimuth,elevation)
plots axial ratio of an antenna over a specified frequency, and in the direction
among frequency, azimuth, or elevation values must be scalar. If only one of the
values are scalar, the plot is 3-D. If two values are scalar, the plot is
Calculate the axial ratio of an equiangular spiral antenna at azimuth=0 and elevation=0.
s = spiralEquiangular; ar = axialRatio(s,3e9,0,0)
ar = Inf
Create a cloverleaf antenna.
cl = cloverleaf; show(cl);
Plot the axial ratio of the antenna from 5 GHz to 6 GHz.
freq = linspace(5e9,6e9,101); axialRatio(cl,freq,0,0);
You can see from the axial ratio plot that the antenna supports circular polarization over the entire frequency range.
antenna— Antenna element
Antenna object, specified as an object.
frequency— Frequency used to calculate axial ratio
Frequency used to calculate axial ratio, specified as a scalar or vector with each element in Hz.
azimuth— Azimuth angle of antenna
Azimuth angle of antenna, specified as a scalar or vector with each element in degrees.
elevation— Elevation angle of antenna
Elevation angle of antenna, specified as a scalar or vector with each element in degrees.
ar— Axial ratio of antenna
Axial ratio of antenna, returned as a scalar in dB.