step
System object: phased.CustomAntennaElement
Namespace: phased
Output response of antenna element
Syntax
RESP = step(H,FREQ,ANG)
Description
Note
Starting in R2016b, instead of using the step
method
to perform the operation defined by the System object™, you can
call the object with arguments, as if it were a function. For example, y
= step(obj,x)
and y = obj(x)
perform
equivalent operations.
returns
the antenna’s voltage response RESP
= step(H
,FREQ
,ANG
)RESP
at
operating frequencies specified in FREQ
and directions
specified in ANG
. The form of RESP
depends
upon whether the antenna element supports polarization as determined
by the SpecifyPolarizationPattern
property. If SpecifyPolarizationPattern
is
set to false
, RESP
is an M-by-L matrix
containing the antenna response at the M angles
specified in ANG
and at the L frequencies
specified in FREQ
. If SpecifyPolarizationPattern
is set to true
, RESP
is a MATLAB® struct
containing
two fields, RESP.H
and RESP.V
,
representing the antenna's response in horizontal and vertical polarization,
respectively. Each field is an M-by-L matrix
containing the antenna response at the M angles
specified in ANG
and at the L frequencies
specified in FREQ
.
Note
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
call the release
method to unlock the object.
Input Arguments
|
Antenna element object. |
|
Operating frequencies of antenna in hertz. |
|
Directions in degrees. If If |
Output Arguments
|
Voltage response of antenna element. The output depends on whether the antenna element supports polarization or not.
|
Examples
Algorithms
The total response of a custom antenna element is a combination
of its frequency response and spatial response. phased.CustomAntennaElement
calculates
both responses using nearest neighbor interpolation, and then multiplies
the responses to form the total response.