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pattern

Display antenna radiation pattern in Site Viewer

Description

example

pattern(tx) displays the 3-D antenna radiation pattern for the transmitter site txsite in the current Site Viewer. Signal gain value (dBi) in a particular direction determines the color of the pattern.

pattern(rx,frequency) displays the 3-D radiation pattern for the receiver site rxsite for the specified frequency.

pattern(___,Name,Value) displays the 3-D radiation pattern with additional options specified by name-value pair arguments.

Examples

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Define and visualize the radiation pattern of a single transmitter site.

tx = txsite;
pattern(tx)

Import and view an STL file. The file models a small conference room with one table and four chairs.

viewer = siteviewer('SceneModel','conferenceroom.stl');

Create a transmitter site that uses a three-element uniform linear array (ULA) with an element spacing of 0.05 meters. Specify the position using Cartesian coordinates in meters.

cfgArray = arrayConfig("Size",[3 1],"ElementSpacing",0.05);
tx = txsite("cartesian", ...
    "AntennaPosition",[0; 0; 2.1], ...
    "Antenna",cfgArray);

Display the antenna pattern. Specify the size of the pattern plot as 0.4 meters.

pattern(tx,"Transparency",0.6,"Size",0.4)

Pan by left-clicking, zoom by right-clicking or by using the scroll wheel, and rotate the visualization by clicking the middle button and dragging or by pressing Ctrl and left-clicking and dragging.

Tilt the antenna by updating the AntennaAngle property of the transmitter. Display the updated pattern.

tx.AntennaAngle = [0 90];
pattern(tx,"Transparency",0.6,"Size",0.4)

Input Arguments

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Transmitter site, specified as a txsite object.

Receiver site, specified as a rxsite object.

Frequency to calculate radiation pattern, specified as a positive scalar.

Name-Value Arguments

Specify optional comma-separated pairs of Name,Value arguments. Name is 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 Name1,Value1,...,NameN,ValueN.

Example: 'Size',2

Size of the pattern plot, specified as a numerical scalar in meters. This parameter represents the distance between the antenna position and the point on the plot with the highest gain.

The default value depends on the CoordinateSystem property of the siteviewer object. When CoordinateSystem is 'geographic', the default size is 50 meters. When CoordinateSystem is 'cartesian', the default size is approximately 1/6 of the scene model size.

Data Types: double

Transparency of the pattern plot, specified as a real number in the range of [0,1], where 0 is completely transparent and 1 is completely opaque.

Data Types: double

Colormap for coloring of the pattern plot, specified as a predefined colormap name or an M-by-3 array of RGB (red, blue, green) triplets that define M individual colors.

Data Types: double

Resolution of 3-D map, specified as 'low', 'medium', or 'high'. This property controls the visual quality and the time taken to plot the pattern where the value of 'low' corresponds to the fastest and the least detailed pattern.

Data Types: double

Map for visualization of surface data, specified as a siteviewer object.[1]

Data Types: char | string

See Also

Introduced in R2019b

[1] Alignment of boundaries and region labels are a presentation of the feature provided by the data vendors and do not imply endorsement by MathWorks®.