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Nexxim Simulator >
Nexxim Component Models >
Coplanar Waveguide Elements >
Rectangular Inductor

Rectangular Inductor

Netlist Format

An instance of a coplanar waveguide rectangular inductor has the following netlist syntax:

Axxx n1 N=val D=val W=val S=val] HA=val WA=val SG=val T=val]
RB=val COMPONENT=cpwreci SUBSTRATE=substrate_name

n1 is the name of the node attached to the rectangular inductor. The entry COMPONENT=cpwreci identifies the element as a coplanar waveguide open stub, physical length.

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 Rectangular Inductor Instance Parameters**
Parameter	Description	Units	Default
N	Number of turns	None	5.5
D	Spiral outer dimension	Meter	10e-3
W	Conductor width	Meter	0.5e-3
S	Spacing between turns	Meter	0.2e-3
HA	Height of air bridge	Meter	3.0e-6
WA	Width of air bridge	Meter	10e-6
SG	Distance to ground plane	Meter	0.5e-6
T	Conductor thickness	Meter	Substrate Metallization
RB	Bulk resistivity	m-Ohm/cm	Substrate Metallization

Netlist Example

A2 Port1 Port2 D=12e-3 N=4 W=0.6e-3 S=0.3e-3 HA=7e-6 WA=11e-6 SG=0.4e-6 COMPONENT=cpwreci 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. This model is not recommended beyond the first resonant frequency.

2. The model is restricted to a square CPW spiral.

3. An error occurs if the size of the inductor cannot accomodate the specified number of turns.

4. The number of turns N has to be an integer multiple of half a turn, i.e., 0.5, 1, 1.5, …

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