For a given theta and phi, Feko produces two distinct sets of values that each comprehensively characterizes the Feko-produced electric field in the far field

Michael R

In CADFEKO, I place two far-field requests:

(a) phi = 0 degrees and theta ranges from -180 to 0 degrees in 1-degree increments

(b) theta = -90 degrees and phi ranges from -90 to 90 in 1-degree increments.

For theta = -90 degrees and phi = 0 degrees, there are then two far-field data sets in the FEKO .out file. One is from (a) above and the other is from (b) above. As copied from the FEKO .out file, the magnitudes and phases from both (a) and (b) are indicated below, where one line shows results from (a), and another line shows results from (b).

 

      LOCATION           ETHETA             EPHI              directivity in dB              POLARISATION
   THETA    PHI      magn.    phase     magn.    phase     vert.     horiz.    total     axial r. angle   direction
 
  -90.00    0.00   8.313E+01  157.06  4.970E+00 -105.84    15.2200   -9.2473   15.2355   0.0593   179.57   LEFT 

  -90.00    0.00   8.313E+01    9.84  4.970E+00  106.95    15.2200   -9.2473   15.2355   0.0593    -0.43   LEFT  

 

The magnitude of ETHETA from (a) is identical to that from (b). The magnitude of EPHI from (a) is identical to that from (b). However, the phase of ETHETA from (a) differs significantly from that of (b).  Additionally, the phase of EPHI from (a) differs significantly from that of (b). It does not make sense to me that the results from (a) should be significantly different from those from (b). Which set of results are correct? Any insight that could be provided would be highly valued.

Regards,

Michael

Torben Voigt

Hi Michael R,

Since the problem cannot be solved here in the forum so far, I would suggest you create a support case on Altair One (if not already done).

Best regards,
Torben