This element is OBSOLETE and is replaced by the Radial Stub, Double Shunt (Closed Form) (MDRSTUB2) element.
|Ro||Outer radius of the stub||Length||L|
|Wg||Width of crossing of stub and microstrip line||Length||W|
|Theta||Angle of the stub||Angle||90 Deg|
This circuit component models a double-shunt "butterfly" radial stub on a single layer substrate (series stubs should be modeled with MRSTUB). Both stubs are of the same size.The model is a two port through element. The parameters W (width of the input microstrip), Wg (width of crossing of stub and microstrip line), and Ro (outer radius) are dimensions entered in the default length units. Theta is a radial stub angle entered in degrees. The parameter MSUB specifies the substrate element, which defines additional cross sectional parameters of the transmission line and substrate characteristics. If blank, a default is used. The model is valid up to its second open-circuit resonance and for 9 ≤ Theta ≤ 180.
The component accounts for losses in metal and in substrate dielectric. Dispersion is not included.
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.