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Uniform Rectangular Array  Support for Uniform Rectangular
Arrays  You can implement a uniform rectangular array (URA) with
phased.URA. Array elements are distributed in the yz-plane with
the array look direction along the positive x-axis. When you use
phased.URA, you must specify these aspects of the array:    •
Sensor elements of the array    • Number of rows and the spacing
between them    • Number of columns and the spacing between them
• Geometry of the planar lattice, which can be rectangular or
triangular  Uniform Rectangular Array with Isotropic Antenna
Elements  This example shows how to create a URA, get
information about its element positions, response, and delays,
and simulate its reception of two sine waves.  Create and view a
six-element URA with two elements along the y-axis and three
elements along the z-axis. Use a rectangular lattice, with the
default spacing of 0.5 meters along both the row and column
dimensions of the array.