Source Point

open the source point definition window



The source point location is defined with its three coordinates (X,Y,Z). For a real antenna, the source point location is the position of the phase center.


This far field pattern may be moved with 3 rotation angles (around axis X, Y and Z).


In the case of coupling computation, the input impedance of the source is required.


If the source must be close to a surface, the On Surface button must be checked. In that case, the software will try to find the nearest surface.




The free space far field pattern of the point source is described in a file. The format of this file is the same as the output format of IDRA. This file may be generated by another software, or it may build from measurements.


Example (there is only the beginning of the file) :

  1.0300000E+09

  -180.0000       180.0000       2.000000   

  0.0000000E+00   135.0000       45.00000   

          LOCATION                  ETHETA                    EPHI              gain in dB            POLARISATION

     THETA       PHI       magn.      phase       magn.      phase       vert.      horiz.      total    axial r.      angle   direction

-0.1800E+03 0.0000E+00 0.9555E-01 -0.1377E+03 0.0000E+00 0.0000E+00  0.4167E-06 -0.2000E+03  0.0000E+00 0.0000E+00 0.1137E-05   LINEAR

-0.1780E+03 0.0000E+00 0.9549E-01 -0.1377E+03 0.0000E+00 0.0000E+00 -0.5292E-02 -0.2000E+03 -0.5293E-02 0.0000E+00 0.1754E-05   LINEAR

-0.1760E+03 0.0000E+00 0.9531E-01 -0.1377E+03 0.0000E+00 0.0000E+00 -0.2118E-01 -0.2000E+03 -0.2118E-01 0.0000E+00 0.1816E-05   LINEAR

-0.1740E+03 0.0000E+00 0.9502E-01 -0.1377E+03 0.0000E+00 0.0000E+00 -0.4771E-01 -0.2000E+03 -0.4771E-01 0.0000E+00 0.1518E-05   LINEAR

-0.1720E+03 0.0000E+00 0.9462E-01 -0.1377E+03 0.0000E+00 0.0000E+00 -0.8494E-01 -0.2000E+03 -0.8494E-01 0.0000E+00 0.2609E-05   LINEAR



In fact, IDRA doesn't read the entire file. The following items are required :




Remarks :


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