|*AutoFill||AutoFill database if not equal to 0||0|
* indicates a secondary parameter
This model implements an X-model of the microstrip open ended line. For a more detailed discussion of the X-models see “ EM-based Models (X-models) ” . This model does not include the effects of dielectric, conductor or radiation losses.
This element uses line types to determine its layout. By default, the layout uses the first line type defined in your Layout Process File (LPF). You can change the element to use any of the line types configured in your process:
Select the item in the layout.
Right-click and chooseto display the Cell Options dialog box.
Click the Layout tab and select a Line Type.
Clickto use the new line type in the layout.
See “Cell Options Dialog Box: Layout Tab ” for Cell Options dialog box Layout tab details.
See “The Layout Process File (LPF)” for more information on editing Layout Process Files (LPFs) and to learn about adding or editing line types.
|0.05 ≤ W/H ≤ 8 Recommended||εrnominal ≤ 16 Recommended|
|0 ≤ Frequency ≤ Fmax Recommended||1 ≤ εrnominal Required|
|(100*|εr-εrnominal|) ≤ 20% Required||(100*|εr-εrnominal|)/εrnominal ≤ 10% Recommended|
 The frequency limits of this model are dynamic with respect to the dimensions of the discontinuity. This dynamic frequency limit is displayed to the user via warning messages for the relative size, and dielectric in use. Importantly, this recommended frequency limit will change as a function of the largest width in the discontinuity for a given substrate definition. The frequency limit warns the user that at least one of the transmission lines constructing the discontinuity is approaching the frequency limit where multiple modes can propagate. See the section marked "Upper Frequency Limitations" in the General Discussion of the X-models.