Comparing the Results

Compare the resource requirements and far field gain patterns for the models using different solver techniques.

  1. Compare the resource requirements for the different techniques.
    Table 1. Comparison of resources using different techniques. Generating the equivalent source data took 8 MB and total time of 36 seconds.
    Model RAM [MB] Total Time [s]
    MLFMM (benchmark) 4910 1403
    MLFMM Horn + PO Reflector 700 3663
    MLFMM Horn + LE-PO Reflector 285 610
    MoM Horn + LE-PO Reflector 196 84
    Near field source + LE-PO Reflector 41 183
    Spherical modes source + LE-PO Reflector 32 42
    Note:
    • Use LE-PO as the solution method for the reflector to reduce the memory requirement and solution time by several orders of magnitude.
    • Subdivide the model into equivalent source models to reduce the resource requirements.
  2. Compare the far field gain patterns for the models.


    Figure 1. Gain of the reflector antenna calculated using different techniques over a 180 degree angle.


    Figure 2. Gain of the reflector antenna calculated using different techniques - main lobe.

    The difference in results is due to coupling between the horn and reflector only taken into account for the MLFMM solution. Although there is no restriction on the size of LE-PO triangles, the geometry must be accurately meshed.

    For example, had a flat plate been used, only two triangles would have been required to obtain the same results.