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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Microstrip >
Microstrip Media Definition

Microstrip Media Definition

Keyword	Description	Unit	Default	Range, Comments
label	Substrate name		Required	String
MS	Medium identifier keyword		Required	No associated value
H	Substrate thickness	m	Required	H > 0
ER	Dielectric constant of substrate	none	Required	1 £ ER £ 128
HU	Distance to top cover	m	No cover	HU > 0
TAND	Dielectric loss tangent	none	0	[0,0.1]
MSAT	4 * p · the material saturation magnetization in gauss	none	0	MSAT ³ 0
MREM	4 * p · the remanent magnetization in gauss	none	0	MREM £ MSAT
TANM	Magnetic loss tangent	none	0	0 £ TANM £ 0.1
metallization	Metallization definitions		0	See “Metallization”

Netlist Form

.SUB label MS H=val ER=val [HU=val] [TAND=val] [MSAT=val] [MREM=val]
+ [TANM=val] [metallization]

Netlist Example

.SUB SUB1 MS H=0.635mm ER=2.4 TAND=0.004 MET1=AU T1=5um RGH=1um

(This example includes metallization definitions described earlier in this chapter.)

Notes

1. The medium identifier keyword MS should be entered immediately following the label.

2. The cover height must be less than 40×H to enable covered microstrip modeling.

3. In several models, radiation effects are modeled if the cover height is not specified and may therefore result in a slower simulation. A cover height greater than 40×H may be supplied to disable the radiation modeling without introducing any undesirable effects.

4. The substrate is considered to be a dielectric substrate unless a non-zero positive MSAT is specified.

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