System object: phased.ShortDipoleAntennaElement
Output response of antenna element
RESP = step(H,FREQ,ANG)
Starting in R2016b, instead of using the
to perform the operation defined by the System object™, you can
call the object with arguments, as if it were a function. For example,
= step(obj,x) and
y = obj(x) perform
the antenna’s voltage response,
RESP = step(
at the operating frequencies specified in
in the directions specified in
ANG. For the short-dipole
antenna element object,
RESP is a MATLAB®
representing the horizontal and vertical polarization components of
the antenna's response. Each field is an M-by-L matrix
containing the antenna response at the M angles
ANG and at the L frequencies
The object performs an initialization the first time the object is executed. This
initialization locks nontunable properties
and input specifications, such as dimensions, complexity, and data type of the input data.
If you change a nontunable property or an input specification, the System object issues an error. To change nontunable properties or inputs, you must first
release method to unlock the object.
Antenna element object.
Operating frequencies of antenna in hertz.
Directions in degrees.
Voltage response of antenna element returned as a MATLAB
Find the response of a short-dipole antenna element at boresight, (0°,0°), and off boresight, (30°,0°). The antenna operates at 256 MHz.
antenna = phased.ShortDipoleAntennaElement(... 'FrequencyRange',[100 900]*1e6,'AxisDirection','Y'); ang = [0 30;0 0]; fc = 250e6; resp = antenna(fc,ang)
resp = struct with fields: H: [2x1 double] V: [2x1 double]
The total response of a short-dipole antenna element is a combination of its frequency response and spatial response. This System object calculates both responses using nearest neighbor interpolation and then multiplies the responses to form the total response.