RF MODULE

12 Click the Solve button on the Main toolbar.
POSTPROCESSING AND VISUALIZATION
1 To visualize the x component of the electric field in the waveguide, start by opening
the Plot Parameters dialog box.
2 On the General tab, make sure that the Solution at angle (phase) text field reads 0.
3 Clear the Boundary check box, and select the Slice check box.
4 Click the Slice tab and select Electromagnetic Waves (rfw)>Electric field, x component
from the Predefined quantities list.
5 In the Slice positioning area, set the number of x levels, y levels, and z levels to 1, 1,
and 0 respectively.
6 Choose WaveLight from the Color table list.
7 Click OK to see the plot in Figure 3-16 on page 119.
The Port boundary conditions generate two S-parameter variables, S11_rfw and
S21_rfw as well as two variables S11dB_rfw and S21dB_rfw, which are the
S-parameters on a dB scale. The names of the variables reflect the port numbers that
you entered in the Boundary Settings dialog box. Make a domain plot in a point to plot
the S-parameters as functions of frequency:
1 From the Postprocessing menu, choose Domain Plot Parameters.
2 On the Point tab in Domain Plot Parameters dialog box select Point 1 and select
Electromagnetic Waves (rfw)>S-parameter dB (S11). Click Apply to plot S 11 on a dB
scale.
3 When plotting S21 first deselect the first two data points on the General tab to better
see the variation. Select the variable Electromagnetic Waves (rfw)>S-parameter dB
(S21) and click OK to make the plot on page 121.
Note: When displaying S-parameter variables, you must set the phase of the solution
to zero. Otherwise, the result displays show incorrect values. In most dialog boxes
that are available on the Postprocessing menu, you can set the phase of the solution via
the Solution at angle (phase) edit field. If the dialog box contains several tabs, it usually
appears on the General tab.
WAVEGUIDE ADAPTER | 127