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result diffrence in HFSS FEKO and CST

Question asked by susanne0s on Sep 8, 2018

Hi,

Hope everybody are good.

Please find attached full question with diagrams.

A coax-fed patch antenna with dimensions given in table below, is simulated in HFSS, CST and FEKO
softwares.

It is seen that:

 
The results of the CST software in the case of
 
- The phase Z component of the electric field on the line parallel to y axis 
and 
The results of the FEKO software in the case of
 
- The magnitude of X component of the electric field on the line parallel to y axis
- The phase of X component of the electric field on the line parallel to y axis
- The phase of Z component of the electric field on the line parallel to y axis
- The phase of Z component of the electric field on the line parallel to x axis 
and
  
 
The results of the HFSS software in the case of
 
- The phase of X component of the electric field on the line parallel to y axis
- The phase of Z component of the electric field on the line parallel to y axis 
 
are completely different from the results of the two other softwares (despite partial similarity of the field
behavior in other cases).
 
The question is why it is such different. 

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