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)
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).
