Viewing the Results

View and post-process the results in POSTFEKO.

A model of the full solution (no ideal receivers or sources) is provided. The ideal receiving antenna calculates the coupling assuming a matched load. The helix antenna is loaded with its complex conjugate impedance. The power in the load represents the total power received by the antenna. Results can then be compared directly.

The coupling results are derived from the received power data. In POSTFEKO the received power may be plotted on a graph. It is also given in the .out file.

Compute the coupling from the following equation:
(1) Coupling ( d B ) = 10 * l o g 10 [ Received power 100 ]
Table 1. Coupling results for the four models at 1.654 GHz
Model Received power (mW) Coupling (dB) Runtime (s)
Full model 2.66 -45.75 15
Far field pattern 2.56 -45.92 <3
Spherical modes 2.60 -45.82 <3
Near field 2.67 -45.73 <3

For convenience results were computed over a frequency range and plotted on a graph in POSTFEKO.

Figure 1. Coupling results over a frequency range for the four models.
Tip: For coupling in dB, use Enable math and enter the equation 10*log(self/100).