Antennas with a plane

Haj Hassan
Haj Hassan Altair Community Member
edited October 2020 in Community Q&A

Hello, 

i am currently making a simulation with Antennas and a plane.

Unfortunately the mesh of the plane is taking too much time und memory.

I used MLFMM, however the problem is the same.

What can i do to make my simulation easier and quicker?

I have attacked my  model.

 

Thanks in advance.

 

Best Regards

Haj Hassan 

Unable to find an attachment - read this blog

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Answers

  • Johan_Huysamen
    Johan_Huysamen
    Altair Employee
    edited February 2020

    Dear Haj Hassan

     

    I noticed in your CADFEKO model that the airplane id represented by separate (disconnected) faces. For accurate modeling, you would have to connect all these touching faces using the Union operation. The wing.stp file you included actually imports as a connected solid and you should therefore be able to use this geometry directly by simply importing and meshing it.

     

    At 10 GHz and using a 'Coarse' mesh the airplane would require about 3.7 million mesh elements. Using the MLFMM for this model would require about 160 Gbytes of memory to solve.

     

    If you do not have access to a system with enough memory or if the run time requirement becomes prohibitive, you should consider using one of the high-frequency asymptotic solvers that Feko offers. You could consider the Physical Optics (PO), Large element Physical Optics (LE-PO), the Ray launching - geometrical optics (RL-GO) or even the Uniform theory of diffraction (UTD) options. These are applied under the Solution tab of the Face properties.

     

    Note that each of these solutions rely of different assumptions and the applicability of each technique would be affected by your application. It is not exactly clear from your CADFEKO model which results you would like to produce. Your current setup with the antenna illuminating the aircraft, would give you the radiation pattern of the antenna with some small perturbation due to the airplane.

     

    If you could clarify your application, we might be able to provide more detailed suggestions.

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