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Ansoft Designer / Ansys Designer 在线帮助文档：

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Microstrip >
   MS Open Stub Near Substrate Edge, Electrical Length (MSOSTEDE, MSOSTEDE_REF)       

MS Open Stub Near Substrate Edge, Electrical Length (MSOSTEDE, MSOSTEDE_REF)

 

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Schematic symbol (MSOSTEDE)

 

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Schematic symbol (MSOSTEDE_REF)

 

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Properties

Description

Units

Default

Range

W

Microstrip line width

m

Required

> 0

S

Separation between strip edge and substrate edge

m

Required

> 0

E

Electrical length

m

Required

 

F

Reference frequency for E

Hz

1 GHz

> 0

sub

Substrate name

none

Required

string

 

Notes

1. This model includes radiation effects if a cover height is not supplied (i.e., open structure.)

2. The MSOSTEDE model is equivalent to a transmission line model followed by an open model. This is also true in the case of negative length specifications which are used for deembedding purposes. Note that in the latter case, the OST model is equivalent to the TRL model with a negative length terminated by an open.

3. The following limits apply:

MS near substrate edge:

6 £ εr £ 18
For HU > 40H:
0.01 £ W/H £ 10 and 0.025 £ S/H £ 5
For HU £ 40H:
0.2 £ W/H £ 4 and 0.5 £ S/H £ 1.8

Netlist Form

MSOSTEDE:NAME n1 [ n2 ] W=val S=val E=val [F=val] SUB=label

Netlist Example

MSOSTEDE:1 3 W=25MIL E=45 F=1.5GHZ S=0.05IN SUB=SUB1

where sub1 needs to be defined in the corresponding .sub statement.

References



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