Array Factor Calculator
Project description
Array Factor Calculator & AF Pattern Plot
Installation
pip install arrayfactor==1.0.3
Modules
The arrayfactor library enables to calculate the normalized array factor values in the range of -180 to 180 degree with respect to the array factor input variables which are: Inter-element spacing,frequency,steering angle, number of array elements,plane.
The six main modules of the package are:
af.af_asym_phasescannig
: To get Array Factor of Uniform or Asymmetrically Spaced Arrays with Phase Shifting Techniqueaf.af_asym_timescannig
: To get Array Factor of Uniform or Asymmetrically Spaced Arrays with True Time Delay Techniqueaf.af_symmetrical_phasescannig
: To get Array Factor of Symmetrically Spaced Arrays with Phase Shifting Techniqueaf.af_symmetrical_timescannig
: To get Array Factor of Symmetrically Spaced Arrays with True Time Delay Techniqueaf.cartesian_plot
: To get Array Factor Pattern on 2D Cartesian plotaf.polar_plot
: To get Array Factor Pattern on 2D Polar plot
Description of Input Variables
-
af.af_asym_phasescannig(
bx
,by
,bz
,f
,f0
,steering_angle
,Nx
,Ny
,Nz
,increase_rate
,plane
) -
af.af_asym_timescannig(
bx
,by
,bz
,f
,f0
,steering_angle
,Nx
,Ny
,Nz
,increase_rate
,plane
) -
af.af_symmetrical_phasescannig(
bx
,by
,bz
,f
,f0
,steering_angle
,Nx
,Ny
,Nz
,increase_rate
,plane
) -
af.af_symmetrical_timescannig(
bx
,by
,bz
,f
,f0
,steering_angle
,Nx
,Ny
,Nz
,increase_rate
,plane
) -
af.cartesian_plot(
x_axis
,y_axis
) -
af.polar_plot(
x_axis
,y_axis
) -
bx
: The coefficient represents the association of distance between elements along x axis and wavelength (dx=bx*lambda) -
by
: The coefficient represents the association of distance between elements along y axis and wavelength (dy=by*lambda) -
bz
: The coefficient represents the association of distance between elements along z axis and wavelength (dz=bz*lambda) -
f
: Frequency of the signal sent. -
f0
: Center Frequency. -
steering_angle
: It is desired beam steering angle. It must be written in degree. -
Nx
: Total number of elements along x axis -
Ny
: Total number of elements along y axis -
Nz
: Total number of elements along z axis -
increase_rate
: This is the amount of change of distance between two successive elements in the case of NON-UNIFORM ASYMMETRICAL OR NON-UNIFORM SYMMETRICAL spacing.
Note: For uniform array, af.af_asym_phasescannig
or af_asym_timescannig
must be used and increase rate
must be set as 0.
For the further information about it, please refer to the link: https://github.com/Barkhausen-Institut/AntennaArraySimulator/blob/master/ArrayFactorUserInterface/Theory%20of%20Array%20Factor.pdf
-
plane
: It decides if the results are obtained on E or H plane. 'E' or 'H' must be written. -
x_axis
: Values of x axis of the plot. -
y_axis
: Values of y axis of the plot.
Outputs of Modules
Output of aforementioned functions (modules) is consisting of two Numpy arrays:
1-First element (array) contains the values of incident angle as range from -180 to +180 degree.
2-Second element (array) contains the values of normalized array factor.
Examples of Usage
Example 1: Get the normalized array factor values of 16 elements broadside uniform linear array along x- axis (spacing based on half wavelength) at 10 GHz on E plane.
from arrayfactor import af
result=af.af_asym_phasescannig(0.5,0,0,10e9,10e9,0,16,1,1,0,'E')
#To get Cartesian Plot:
af.cartesian_plot(result[0], result[1])
#To get Polar Plot:
af.polar_plot(result[0], result[1])
Example 2: Get the normalized array factor values of 8 elements symmetric linear array with the increase rate=0.1 along x- axis (spacing based on half wavelength) at 10 GHz on E plane and with 30° beam steering angle (by TTD technique).
from arrayfactor import af
result=af.af_symmetrical_timescannig(0.5,0,0,10e9,10e9,0,16,1,1,0.1,'E')
#To get the Cartesian Plot:
af.cartesian_plot(result[0], result[1])
#To get Polar Plot:
af.polar_plot(result[0], result[1])
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