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Nexxim Simulator >
Nexxim Component Models >
Coplanar Waveguide Elements >
Unmitered Bend, Gap Width

Unmitered Bend, Gap Width

Netlist Format

An instance of a coplanar waveguide unmitered bend, gap width, has the following netlist syntax:

Axxx n1 n2 [W=val] [G=val]
COMPONENT=cpw_unmitered_bend SUBSTRATE=substrate_name

n1 and n2 are the names of the nodes attached to the bend. The entry COMPONENT=cpw_unmitered_bend identifies the element as a coplanar waveguide unmitered bend, gap width specified.

The SUBSTRATE=substrate_name is the coplanar waveguide substrate model name selected for the design (see Selecting a Coplanar Waveguide Substrate for details).

**Coplanar Waveguide Unmitered Bend, Gap Widthm Instance Parameters**
Parameter	Description	Units	Default
W1	Center conductor width	Meter	1.0e-3
G	Gap width	Meter	1.0e-3

Netlist Example

A5 Port1 Port2 W=0.75e-3 G=1.1e-3 COMPONENT=cpw_unmitered_bend SUBSTRATE=CPW1

where CPW1, the selected layout technology or substrate type, has a definition such as:

.SUB CPW1 CPW(
+ H=0.001524 Er=4.4 TAND=0.02 HU=2.54E-4 HL=2.54e-4
+ MET1=1.724137931034483 T1=2.54e-5 RGH=0)

Notes

1. Reference planes coincide with the inside vertex of the corner, as shown in the figure.

2. For accurate results, the substrate definition should specify:
H > W + 2´G
0.1 < W/(W1 + 2´G) < 0.9

3. The coplanar mode is assumed to exist only. Parasitic effects due to air bridges are not considered by this model.

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