Model Parameter

Description

Unit

Default

DLEV

Dielectric model selector

0 = Microstrip, sea of dielectric

1 = Microstrip

2 = Stripline

3 =Dielectric with overlay dielectric

None

1

ELEV

Electrical model selector

1 = geometric

2 = precomputed

3 = electrical

None

1

LLEV

Capacitance CREF from signal reference nodes to system reference node

0 = Omit capacitance

1 = Include capacitance

None

0

PLEV

Physical model selector

1 = planar

2 = coaxial (not supported)

3 = twin-lead (not supported)

None

1

Model Parameter

Description

Unit

Default

C

Capacitance per unit length (ELEV=2)

Farad/Meter

0.0

CEXT

External capacitance per unit length between reference plane and ground (LLEV=1)

Farad/Meter

Calculated

CMULT

Dielectric constant of material between reference plane and ground (LLEV=1) [Used when CEXT is not specified]

None

1.0

CORKD

Correction multiplier for KD

None

1.0

G

Conductance per unit length (ELEV=2)

Mho/Meter

0.0

HGP

Height of reference plane above simulator ground, for calculating capacitance from reference plane to simulator ground (LLEV=1) [Used when CEXT is not specified]

Meter

1.5 ´ HT

HT (HT1)

Height of all conductors

Meter

1.0e-3

KD (KD1)

Relative dielectric constant of dielectric

None

3.5

KD2

Relative dielectric constant for overlay dielectric (DLEV=3)

None

3.5

L

Inductance per unit length (ELEV=2)

Henry/Meter

0.0

MAXL

Maximum number of lumps per element

None

20

NL

Number of conductors
(1 to 20)

None

Calculated from instance

NLAY

Number of layers for conductor resistance calculation

1 = DC/core resistance

2 = Core and skin resistance at skin effect frequency

None

1

R

Resistance per unit length (ELEV=2)

Ohm/Meter

0.0

RHO

Conductor resistivity

Ohm-Meter

17.0e-9

RHOB

Reference plane resistivity

Ohm-Meter

RHO

SIG (SIG1)

Dielectric conductivity

Mho/Meter

0.0

SP (SP12)

Spacing between conductors
(NL > 1)

Meter

1.0e-3

TH (TH1)

Thickness of all conductors

Meter

17.0e-6

THB

Thickness of reference plane

Meter

TH

THK1

Dielectric thickness for DLEV=3

Meter

HT

THK2

Overlay dielectric thickness for DLEV=3

Meter

0.0

TS

Distance between reference planes for stripline (DLEV=2)

Meter

(2 ´ HT) + TH

WD (WD1)

Width of each conductor

Meter

1.0e-3

WLUMP

Number of lumps per wavelength

None

20

XW

Difference between drawn width and physical width

Meter

0.0