RF MODULE

OPTIONS AND SETTINGS
16 | CHAPTER 2: TUTORIAL MODELS
Open the Global Expressions dialog box from the Options menu, and define the variable.
NAME EXPRESSION DESCRIPTION
Z 1/I Impedance of antenna
GEOMETRY MODELING
You can use symmetries to reduce the size of the model. It is sufficient to include only
one quarter of the antenna with surroundings.
1 Create a work plane by opening the Work-Plane Settings dialog box from the Draw
menu, click the yz button.
2 Click OK to obtain a work plane in the yz-plane.
3 Shift-click the Rectangle/Square button on the Draw toolbar to open the Rectangle
dialog box. Specify the rectangle R1 according to the table below, then click OK.
NAME WIDTH HEIGHT BASE X Y
R1 0.5 0.6 Corner 0 -0.3
R2 0.005*0.3 0.47*0.3 Corner 0 -0.47*0.15
4 Repeat the previous step for the rectangle R2.
5 Select both rectangles and click the Difference button on the Draw toolbar.
6 Shift-click the Point button on the Draw toolbar. In the Point dialog box, specify the
point PT1 according to the table below, then click OK.
NAME X Y
PT1 0.005*0.3 0
PT2 0.01 0
7 Repeat the previous step for the point PT2.
8 Press Ctrl+A to select all objects, then choose Revolve from the Draw menu.
9 Enter -90 in the α2 edit field, then click OK.
This completes the geometry modeling. You created the two loops by revolving the
two points in the work plane. If you zoom in closer to the origin, you see two quarter
loops.