Narrowband Receive Array

Receiving narrowband antenna array.

narrowband receive array

Description

The Narrowband Receive Array unit implements a narrowband antenna array that summarises the values of each signal at each individual element. The antenna array operates with narrowband plane waves incident on the individual elements of the antenna array. The delay at each element is approximated by the corresponding phase shift in the time domain.

Ports

Input

X - incoming signal
complex matrix M on L | real matrix M on L

The input signal given as a complex matrix M on L, where M is the number of samples of the signal and L is the number of incident signals. Each column X represents a far-field signal.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

Support for complex numbers: Yes

Ang - direction of signal emission
real matrix 2 by L | real vector-column 2 by 1

Signal emission directions given as a real matrix 2 on L. Each column specifies a radiation direction in the form [azimuth; elevation]. The azimuth angle shall lie in the range from −180° to 180° inclusive. The elevation angle shall lie in the range from −90° to 90° inclusive. The units of measurement are degrees.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

W - weight coefficients of antenna elements and separate sublattices
complex vector-column P by 1

The weights of elements or sublattices given as a complex column vector P by 1, where P is the number of antenna array elements (or sublattices if the antenna array supports sublattices).

Dependencies

To use this port, select the Enable weights input checkbox.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

WS - input port for weights of individual antenna sublattice elements
complex matrix N_SE on L

The weights of the sublattice elements given as a complex matrix N_SE on L, where N_SE is the number of sublattices. L is the number of incident signals. The same weight is applied to individual elements of the sublattice.

Table 1. Weights of sublattice elements
Antenna array property	Sublattice weights
Replicated grating	All sublattices have the same dimensions. Then the sublattice weights form a matrix N_SE by N. N_SE is the number of antenna elements in each sublattice, N is the number of sublattices. Each column of WS specifies the weights for the corresponding sublattice.
Broken antenna array	The sublattices may not have the same dimensions. In this case, the sublattice weights can be given as a matrix N_SE by N, where N_SE is the number of antenna elements in the largest sublattice. The first Q entries in each column are the antenna element weights for the sublattice, where Q is the number of antenna elements in the sublattice.

Dependencies

To use this port, specify Replicated subarray or Partitioned array for the Specify sensor array as parameter, and Custom for the Subarray steering method parameter.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

Steer - ray rotation angle of individual sublattices
real vector-column 2 by 1

The angle of rotation of a sublattice, given as a real column vector of length 2. The vector is of the form [azimuth;elevation]. The azimuth angle must be in the range from −180° to 180° inclusive. The elevation angle must be in the range from −90° to 90° inclusive. The units of measurement shall be degrees.

Dependencies

To use this port, set the Specify sensor array as parameter to Replicated subarray or Partitioned array and the Subarray steering method parameter to Phase or Time.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

Output

Y - accumulated values of incident signals for each separate element of the antenna array
`complex matrix M on P

Summed signals returned as a complex matrix M on P. M is the length of the input signal. P is the number of antenna elements of the antenna sublattice (or sublattices if sublattices are supported). Each column corresponds to the signal collected by the corresponding antenna array element (or corresponding sublattices, if sublattices are supported).

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

Support for complex numbers: Yes

Parameters

Main

Signal propagation speed - speed of signal propagation, m/c
3e8 (by default) | positive scalar

Signal propagation speed as a real positive scalar. By default, the value of the speed of light is 3e8 m/c.

The unit of measurement is metres per second.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64.

Operating frequency (Hz) - system operating frequency
3e8 (By default) | positive scalar

The operating frequency of the system specified as a positive scalar. The unit of measurement is Hz.

Data types: Float16, Float32, Float64, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Bool.

Sensor gain measure - gain of antenna element
dB (by default) | dBi

Antenna gain in dB or dBi.

When dB is set, the input signal power is scaled by the antenna power (in dB) in the corresponding direction and then summed.
When dBi is set, the input signal power is scaled by the pattern power (in dBi) in the corresponding direction and then combined. This parameter is useful when you want to compare the results with values calculated from the basic radar equation, which uses dBi to specify the antenna gain. Computations using the `dBi' parameters are costly, since integration in all directions is required to calculate the total radiated power of the antenna.

By default, dB is used.

Enable weights input - enable weights input
enable (by default) | `enable'.

Select this checkbox to set the antenna array weights using the W input port. The input port is used only when the checkbox is selected.

Sensor Array

Specify sensor array as - method of specifying the antenna array
Array (no subarrays) (by default) | Single element | Replicated subarray | Partitioned array

Specify an antenna element or antenna array of an antenna. An antenna array may also contain subarrays or be partitioned.

Available values:

Single element.
Array (no subarrays)
Partitioned array
Replicated subarray

Element

Type of antenna array element.

Available values:

Isotropic Antenna.
Cardioid Antenna
`Cosine Antenna
`Custom Antenna
`Gaussian Antenna
`Sinc Antenna
`Omni Microphone
`Custom Microphone

Operating frequency range (Hz) - operating frequency range of the antenna array element
[0,1e20] (by default) | ` real vector-string 1 by 2`

The operating frequency range of the antenna array element as a 1-by-2 string-vector in the form of [LowerBound,UpperBound]. The element has no response outside this frequency range. Frequency measurement units are Hz.

Dependencies

To use this parameter, set the Element type parameters to Isotropic Antenna, Cosine Antenna or Omni Microphone.

Baffle the back of the element - consider radiation to the rear hemisphere of the Isotropic Antenna element or Omni Microphone.
off (by default) | on

Set this flag to exclude radiation to the rear hemisphere. The response from the rear hemisphere at all azimuth angles outside the ±90° interval from the broadside are set to zero. The broadside direction is defined as an azimuth angle of 0° and a place angle of 0°.

Dependencies

To use this parameter, set the Element type parameters to Isotropic Antenna or Omni Microphone.

Null axis direction - the direction of the axis along the null radiation.
-x (By default) | +x | +y | -y | +z | -z.

Axis direction along the null radiation.

Dependencies

To use this parameter, set the Element type parameters to Cardioid Antenna.

Exponent of cosine pattern - exponent of exponent degree when specifying the shape of cosine pattern
[1.5, 1.5] (By default) | non-negative scalar | real matrix of non-negative values 1 by 2.

The exponent of the degree of the exponent of cosine model as a non-negative scalar or a 1-by-2 real matrix of non-negative values. If the Exponent of cosine pattern is a 1 by 2 vector, the first element is the exponent of the exponent degree in the azimuth direction and the second element is the exponent of the exponent degree in the angle-of-place direction. When this parameters is scalar, the cosines in the azimuth and elevation directions are raised to the same degree.

Dependencies

To use this parameter, set the Element type parameter to Cosine Antenna.

Operating frequency vector (Hz) - array of operating frequencies of the antenna array element
[0,1e20] (by default) | real string vector

The array of operating frequencies of the antenna array element as a string vector 1 on of increasing real values. The element has no response outside the frequency range given by the minimum and maximum elements of this vector. The units of frequency measurement are Hz.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna or Custom Microphone. To set the response at these frequencies, use the Frequency responses (dB) parameters.

Frequency responses (dB) - frequency responses of the antenna array element
[0,0] (by default)| real vector-string.

The frequency response of custom antenna array elements is determined by the Operating frequency vector (Hz) parameters. The dimensions of the Frequency responses (dB) vector must match the dimensions of the vector defined by the Operating frequency vector (Hz) parameters.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna or Custom Microphone.

Input Pattern Coordinate System - selects the coordinate system of the custom antenna pattern
az-el (by default) | phi-theta.

Selects the user antenna pattern coordinate system, either az-el or phi-theta is specified. When az-el is selected, the Azimuth angles (deg) and Elevations angles (deg) parameters are used to specify the coordinates of the directional pattern points. When the `phi-theta parameter is specified, the Phi angle (deg) and Theta angles (deg) parameters are used to specify the coordinates of the pattern points.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna.

Azimuth angles (deg) - azimuth angles of the antenna radiation pattern
[-180:180] (By default) | real vector-string

The azimuth angle values for which the antenna radiation pattern will be calculated as vector-string 1 at . must be greater than 2. The values of the azimuth angles must lie in the range from −180° to 180° inclusive and be in strictly ascending order.

Dependencies

To use this parameter, set the Element type parameter to Custom Antenna and the Input Pattern Coordinate System parameter to az-el.

Elevation angles (deg) - values of antenna pattern location angles
[-90:90] (by default) | real vector-string.

The values of the place angles at which you want to calculate the radiation pattern as vector 1 at . must be greater than 2. The units of measurement of the angles are degrees. The elevation angles must lie in the range from −90° up to and including 90° and be in strictly ascending order.

Dependencies

To use this parameter, set the Element type parameter to Custom Antenna and the Input Pattern Coordinate System parameter to az-el.

Phi Angles (deg) - values of Phi angles of the antenna pattern
[0:360] (by default) | ` real vector-line 1 on P`

Angular coordinates Phi of the points at which the antenna radiation pattern is specified. Defined as a real vector-string 1 on . must be greater than 2. The units of measurement of the angles are degrees. The values of the angles Phi must lie in the range from 0° to 360° and be arranged in strictly ascending order.

Dependencies

To use this parameter, set the Element type parameter to Custom Antenna and the Input Pattern Coordinate System parameter to phi-theta.

Theta Angles (deg) - values of Theta angles of the antenna radiation pattern
[0:180] (by default) | real vector-string 1 on Q

Theta angular coordinates of the points where the antenna radiation pattern is specified. Defined as a real vector-string 1 on . must be greater than 2. The units of measurement of the angles are degrees. Values of the angles Theta must lie in the range from 0° to 180° and be arranged in strictly ascending order.

Dependencies

To use this parameter, set the Element type parameter to Custom Antenna and the Input Pattern Coordinate System parameter to phi-theta.

Magnitude pattern (dB) - the magnitude of the antenna pattern
zeros(181,361) (by default) | real matrix Q on P | real array Q on P on L

Antenna pattern magnitude given as a matrix by or an array by by .

If the Input Pattern Coordinate System parameter is set to az-el, then is equal to the length of the vector defined by the Elevation angles (deg) parameter, in turn, is equal to the length of the vector defined by the Azimuth angles (deg) parameter.
If the Input Pattern Coordinate System parameter is set to phi-theta, then is equal to the length of the vector defined by the Theta Angles (deg) parameter, in turn, is equal to the length of the vector defined by the Phi Angles (deg) parameter.

The value of is equal to the value of the Operating frequency vector (Hz) parameters.

If the value of this parameter is a matrix to , then the same scheme is applied for all frequencies specified in the Operating frequency vector (Hz) parameter.
If the value is an array to to , each element to of the array specifies a pattern for the corresponding frequency specified in the Operating frequency vector (Hz) parameters.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna.

Phase pattern (deg) - the phase of the radiation pattern of the custom antenna
zeros(181,361) (By default) | real matrix Q on P | real array Q on P on L

The phase radiation pattern of the combined antenna, given as a matrix on or an array on on .

If the Input Pattern Coordinate System parameter is set to az-el, then is equal to the length of the vector defined by the Elevation angles (deg) parameter, in turn, is equal to the length of the vector defined by the Azimuth angles (deg) parameter.
If the Input Pattern Coordinate System parameter is set to phi-theta, then is equal to the length of the vector defined by the Theta Angles (deg) parameter, in turn, is equal to the length of the vector defined by the Phi Angles (deg) parameter.

The value of is equal to the value of the Operating frequency vector (Hz) parameters.

If the value of this parameter is a matrix to , then the same scheme is applied for all frequencies specified in the Operating frequency vector (Hz) parameter.
If the value is an array to to , each element to of the array specifies a pattern for the corresponding frequency specified in the Operating frequency vector (Hz) parameters.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna.

Align element normal with array normal - align the normal of the antenna array element with the array normal
On (By default) | Off.

If the parameters value is on, the pattern of the antenna element is rotated to align with the array normal. If off, the pattern of the element is not rotated.

If the antenna is used in an antenna array and the Input Pattern Coordinate System parameters is set to az-el, checking this checkbox rotates the pattern so that the x-axis of the element coordinate system points along the array normal. If no selection is made, the element pattern without rotation is used.

If the antenna is used in an antenna array and the Input Pattern Coordinate System parameters is set to phi-theta, checking this checkbox rotates the pattern so that the z-axis of the element coordinate system points along the array normal.

Use this parameter together with the Array Normal parameter of the URA and UCA arrays.

Dependencies

To use this parameter, set the Element type parameters to Custom Antenna.

Radiation pattern beamwidth (deg) - width of the antenna pattern beamwidth
[10, 10] (by default) | real scalar | real vector-string 1 by 2

Antenna pattern beamwidth in degrees.

Dependencies

To use this parameter, set the Element type parameters to Gaussian Antenna.

Polar pattern frequencies (Hz) - values of frequencies for polar pattern of the microphone
1e3 (By default) | real scalar | real vector-string 1 by L.

The frequency values for the polar radiation pattern are given as a real scalar or real vector-string 1 on . The frequencies lie within the frequency range specified by the parameter Operating frequency vector (Hz).

Dependencies

To use this parameter, set the Element type parameters to Custom Microphone.

Polar pattern angles (deg) - angle values for the polar pattern of the microphone
[-180:180] (by default) | real vector string 1 on P.

The angle values for the microphone’s polar pattern are specified as a vector . The angles are measured from the centre axis of the microphone and should range from −180° to 180° inclusive.

Dependencies

To use this parameter, set the Element type parameters to Custom Microphone.

Polar pattern (dB) - polar pattern of the microphone
zeros(1,361) (by default) | `real vector string 1 to L'.

Set the polar pattern magnitude of the user microphone element as a real vector-string 1 by , where is the number of frequencies specified in the Polar pattern frequencies (Hz) parameters. The string represents the polar pattern magnitude measured at the corresponding frequency specified in Polar pattern frequencies (Hz). The directional pattern is measured in the azimuth plane. In the azimuth plane, the angle of place is 0° and the centre axis is 0° in azimuth and 0° in elevation. The polar pattern is symmetrical around the centre axis. Based on the polar diagram, you can construct the microphone’s radiation pattern in three-dimensional space.

Dependencies

To use this parameter, set the Element type parameters to Custom Microphone.

Array

Geometry - geometry of the antenna array
ULA (by default) | URA | UCA | Conformal Array

The geometry of the antenna array defined as:

ULA is a uniform linear antenna array.
URA - uniform rectangular antenna array.
UCA - uniform circular antenna array.
Conformal Array - arbitrary arrangement of antenna elements.

Number of elements - number of antenna array elements
2 for ULA arrays and 5 for UCA antenna arrays (by default) | `an integer greater than or equal to 2'.

The number of antenna array elements for ULA or UCA arrays, specified as an integer greater than or equal to 2.

When the Specify sensor array as parameter is set to Replicated subarray, this parameter is applied to each subarray.

Dependencies

To use this parameter, set the Geometry parameters to ULA or UCA.

Array size - URA antenna array dimensions
[2,2] (by default) | positive integer | vector of positive integers 1 by 2

URA antenna array dimensions specified as a positive integer or a vector of positive integers 1 by 2.

If the antenna array size is a 1-by-2 vector, the vector is of the form [NumberOfArrayRows,NumberOfArrayColumns].
If the antenna array size is an integer, then the array has the same number of rows and columns.

When the Specify sensor array as parameter is set to Replicated subarray, this parameter is applied to each subarray.

For URA, the antenna array elements are indexed from top to bottom of the leftmost column and then proceed to the next columns from left to right.

Dependencies

To use this parameter, set the Geometry parameter to URA.

Element spacing (m) is the distance between the elements of the antenna array
` 0.5 for ULA antenna arrays and [0.5,0.5] for URA antenna arrays (by default)` | ` positive scalar for ULA or URA antenna arrays | ` two-element vector of positive values for URA antenna arrays`.

Distance between neighbouring elements of the antenna array:

ULA - specify the distance between two neighbouring elements of the antenna array as a positive scalar.
URA - specify the distance as a positive scalar or vector of positive values 1 by 2. If Element spacing (m) is a scalar, the distances between rows and columns are equal. If Element spacing (m) is a vector, the vector is [SpacingBetweenArrayRows,SpacingBetweenArrayColumns].

When the Specify sensor array as parameter is set to Replicated subarray, this parameter is applied to each sublattice.

Dependencies

To use this parameter, set the Geometry parameter to ULA or URA.

Array axis - direction of the linear axis of ULA
y (By default) | x | z

ULA linear axis direction specified as y, x or z. All elements of the ULA antenna array are uniformly distributed along this axis in the local coordinate system of the antenna array.

Dependencies

To use this parameter, set the Geometry parameter to ULA.
This parameter is also used if the unit only supports ULA arrays.

Element lattice - lattice of URA element positions
Rectangular (by default) | Triangular.

Lattice of URA element positions specified as rectangular or triangular.

Rectangular - aligns all elements by rows and columns.
Triangular - shifts elements of the even row of the rectangular lattice towards the positive direction of the row axis. The offset is half the distance between the elements by the row size.

Dependencies

To use this parameter, set the Geometry parameter to URA.

Array normal - direction of the antenna array normal
x for URA arrays or z for UCA antenna arrays (by default) | y.

Antenna array normal direction specified as x, y or z.

The elements of planar antenna arrays lie in a plane orthogonal to the chosen direction of the antenna array normal. The angular coordinate directions of the antenna elements are along the normal direction of the antenna array.

x - the array elements lie in the yz-plane. The angular coordinate vectors of all antenna elements are directed along the x-axis.
y - the array elements lie in the zx-plane. The vectors of angular coordinates of all antenna elements are directed along the y-axis.
z - the array elements lie in the xy-plane. The vectors of angular coordinates of all antenna elements are directed along the z-axis.

Dependencies

To use this parameter, set the Geometry parameter to URA or UCA.

Radius of UCA (m) - radius of UCA antenna array
0.5 (by default) | positive scalar

Radius of UCA antenna array, positive scalar.

Dependencies

To use this parameter, set the Geometry parameter to UCA.

Element positions (m) - positions of antenna elements of the conformal antenna array
[0;0;0] (by default) | ` real matrix 3 by N`

The positions of the antenna elements of a conformal antenna array, given as a 3-by-N matrix of real values, where N is the number of antenna elements in the conformal antenna array. Each column of this matrix represents the position [x;y;z] of the antenna array element in the local coordinate system of the antenna array. The origin of the local coordinate system is (0,0,0). The units of measurement are metres.

When the Specify sensor array as parameter is set to Replicated subarray, this parameter is applied to each subarray.

Dependencies

To use this parameter, set the Geometry parameter to Conformal Array.

Element normals (deg) - direction of normal vectors of antenna elements of the conformal antenna array
[0;0] | ` vector-column 2 by 1` | ` matrix 2 by N`

The direction of the normal vectors of the antenna elements of a conformal antenna array, given as a 2-by-1 column vector or a 2-by-N matrix. N denotes the number of elements in the antenna array. For a matrix, each column specifies the normal direction of the corresponding element in the form [azimuth;elevation] with respect to the local coordinate system. In the local coordinate system, the positive x-axis coincides with the normal direction of the conformal antenna array. If the parameter value is a 2-by-1 column vector, the same pointing direction is used for all elements of the antenna array.

When the Specify sensor array as parameter is set to Replicated subarray, this parameter is applied to each subarray.

The Element positions (m) and Element normals (deg) parameters can be used to represent any arrangement in which pairs of antenna elements differ from each other by certain transformations. These transformations may include translation, azimuth rotation, and elevation rotation. However, transformations requiring rotation with respect to the direction of the normal cannot be used.

Dependencies

To use this parameter, set the Geometry parameters to Conformal Array.

Taper - change of directional pattern of antenna array elements
1 (by default) | complex scalar | complex vector.

The change of the directivity diagram of the antenna array elements is specified as a complex scalar or complex vector 1 at , where is the number of antenna array elements.

The coefficients that change the directivity pattern, also called element weights, multiply the responses of the antenna array elements. The coefficients change both the amplitude and phase of the response to reduce side lobes or the direction of the main response axis.

If the value of the Taper parameters is a scalar, the same weight is applied to each element. If Taper is a vector, then the weight from the vector is applied to the corresponding antenna array element. The number of weights must correspond to the number of antenna array elements.

When the Specify sensor array as parameter is set to Replicated subarray, this parameter is applied to each subarray.

Subarray

Subarray definition matrix - determining whether elements belong to sublattices
`logical matrix

Define the sublattice selection as a matrix M by N. M is the number of sublattices, N is the total number of elements in the antenna array. Each row of the matrix represents a sublattice, and each entry in the row indicates whether the element belongs to that sublattice. If the entry is zero, the element does not belong to the sublattice. A non-zero entry represents the complex weight applied to the corresponding element. Each row must contain at least one non-zero entry.

The phase centre of each sublattice is at the geometric centre of the sublattice. The geometric centre of a sublattice depends on the sublattice definition matrix and Geometry parameters.

Dependencies

To use this parameter, set the Specify sensor array as parameters to Partitioned Array.

Subarray steering method - method of steering the DN beam of a separate sublattice
None (by default) | Phase | Time | Custom

Sublattice steering method, specified as:

None.
Phase
Time
Custom

Selecting Phase or Time allows the Steer input port to be used for the block.

Selecting Custom allows the unit to use the WS input port.

Dependencies

To use this parameter, set the Specify sensor array as parameters to Partitioned Array or Replicated subarray.

Phase shifter frequency (Hz) - sublattice phase shift frequency
3.0e8 (by default) | positive scalar

The operating frequency of the sublattice phase shift, specified as a positive real scalar. The unit of measurement is Hz.

Dependencies

To use this parameter, set the Sensor array parameters to Partitioned array or Replicated subarray and set the Subarray steering method parameters to Phase.

Number of bits in phase shifters - phase shift quantisation bits
0 (by default) | non-negative integer.

Sublattice phase shift quantisation bits, specified as a non-negative integer. A value equal to zero means that quantisation is not performed.

Dependencies

To use this parameter, set the Sensor array parameter to Partitioned array or Replicated subarray and set the Subarray steering method parameter to Phase.

Subarrays layout - subarrays layout
Rectangular (by default).

Specify the layout of replicated sublattices.

When Rectangular is set, the Grid size and Grid spacing parameters are used to position the subgrids.

When Custom is set, the Subarray positions (m) and Subarray normals parameters are used to position the subgrids.

Dependencies

To use this parameter, set the Sensor array parameters to Replicated subarray.

Grid size - dimensions of the rectangular grid of the sublattice
[1,2] (by default).

Rectangular sublattice grid size specified as a single positive integer or a vector-string of positive integers 1 by 2.

If Grid size is an integer scalar, the antenna array has an equal number of subgrids in each row and each column.
If Grid size is a 1-by-2 row vector of the form [NumberOfRows, NumberOfColumns], then the first variable is the number of sub-grids in each column. The second variable is the number of sublattices in each row. A row is along the local y-axis, and a column is along the local z-axis.

Dependencies

To use this parameter, set the Sensor array parameter to Replicated subarray and the Subarrays layout parameter to Rectangular.

Grid spacing (m) - distance between sublattices on a rectangular grid
Auto (By default) | positive scalar | positive real vector 1 by 2

The distance between sublattices in a rectangular grid, given as a positive real scalar or a 1-by-2 vector or Auto. The units of measurement are metres.

If Grid spacing is a scalar, the row and column spacing is the same.

If Grid spacing is a 1 by 2 row vector, the vector is of the form [SpacingBetweenRows,SpacingBetweenColumn], the first variable specifies the row spacing along the column. The second variable is the spacing between columns along the row.

If the Grid spacing parameters are set to Auto, replication preserves the spacing between subgrid elements for both rows and columns when building a full antenna array. This option is available only if ULA or URA is selected for the Geometry parameters.

Dependencies

To use this option, set the Sensor array parameters to Replicated subarray and the Subarrays layout parameters to Rectangular.

Subarray positions (m) - subarray positions
[0,0;0.5,0.5;0,0] (by default) | ` real matrix 3 by N`

The positions of the sublattices in the user grid, given as a 3 by N real matrix, where N is the number of sublattices in the antenna array. Each column of the matrix represents the position of one sublattice in the local coordinate system of the antenna array. Coordinates are expressed as [x; y; z]. The units of measurement are metres.

Dependencies

To use this parameter, set the Sensor array parameter to Replicated subarray and the Subarrays layout parameter to Custom.

Subarray normals - direction of subarray normals
[0,0;0,0] (by default) | ` real matrix 2 by N`

The direction of the sublattice normals of the antenna array. The value of this parameters is a 2 by N matrix, where N is the number of sublattices in the antenna array. Each column of the matrix specifies the normal direction of the corresponding sublattice in the form [azimuth;elevation]. The units of angles are degrees. The angles are defined relative to the local coordinate system.

The Subarray positions and Subarray normals parameters can be used to represent any arrangement in which pairs of sublattices are distinguished by certain transformations. These transformations may include translation, azimuth rotation, and elevation rotation. However, you cannot use transformations that require rotation with respect to a normal.

Dependencies

To use this parameter, set the Sensor array parameter to Replicated subarray and the Subarrays layout parameter to Custom.