Plot array directivity and patterns
pattern(___, plots the
array pattern with additional options specified by one or more
returns the array pattern in
EL_ANG] = pattern(___)
contains the coordinate values corresponding to the rows of
EL_ANG output contains the coordinate values corresponding to the columns
PAT. If the
'CoordinateSystem' parameter is set to
AZ_ANG contains the U
coordinates of the pattern and
EL_ANG contains the V
coordinates of the pattern. Otherwise, they are in angular units in degrees.
UV units are dimensionless.
array— Phased array
Phased array, specified as a Phased Array System Toolbox System object.
comma-separated pairs of
the argument name and
Value is the corresponding value.
Name must appear inside quotes. You can specify several name and value
pair arguments in any order as
'Polarization'— Polarization type
Polarization type, specified as the comma-separated pair consisting of
'Polarization' and either
'combined', the horizontal and vertical polarization patterns are
'H', only the horizontal
polarization is displayed. If
only the vertical polarization is displayed.
To enable this property, set the
array argument to an array that
supports polarization and then set the
'Type' name-value pair to
Directivity describes the directionality of the radiation pattern of a sensor element or array of sensor elements.
Higher directivity is desired when you want to transmit more radiation in a specific direction. Directivity is the ratio of the transmitted radiant intensity in a specified direction to the radiant intensity transmitted by an isotropic radiator with the same total transmitted power
where Urad(θ,φ) is the radiant intensity of a transmitter in the direction (θ,φ) and Ptotal is the total power transmitted by an isotropic radiator. For a receiving element or array, directivity measures the sensitivity toward radiation arriving from a specific direction. The principle of reciprocity shows that the directivity of an element or array used for reception equals the directivity of the same element or array used for transmission. When converted to decibels, the directivity is denoted as dBi. For information on directivity, read the notes on Element Directivity and Array Directivity.
Define the azimuth and elevation conventions used in the toolbox.
The azimuth angle of a vector is the angle between the x-axis and its orthogonal projection onto the xy-plane. The angle is positive when going from the x-axis toward the y-axis. Azimuth angles lie between –180° and 180° degrees, inclusive. The elevation angle is the angle between the vector and its orthogonal projection onto the xy-plane. The angle is positive when going toward the positive z-axis from the xy-plane. Elevation angles lie between –90° and 90° degrees, inclusive.