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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Stripline >
SL Branch Line Coupler (SLCOUPB)

SL Branch Line Coupler (SLCOUPB)

Properties	Description	Units	Default	Range
W1	Width of line connected to node n1; Width of line connected to node n4	m	Required	> 0
W2	Width of line connected to node n2; Width of line connected to node n3	m	Required	> 0
W3	Width of line between nodes n1 and n4	m	Required	> 0
W4	Width of line between nodes n1 and n2; Width of line between nodes n3 and n4	m	Required	> 0
W5	Width of line between nodes n2 and n3	m	Required	> 0
L1	Length along center line of both lines of width W4	m	Required	> 0
L2	Half length along center line of W3	m	Required	> 0
L3	Half length along center line of W5	m	L2	> 0
sub	Substrate label	none	Required	string

Notes

1. The following condition should be satisfied: 0.01 < W_i/B < 100, i=1,2,3,4,5.

Netlist Form

SLCOUPB:NAME n1 n2 n3 n4 W1=val W2=val W3=val W4=val W5=val L1=val L2=val [L3=val] SUB=label

Netlist Example

SLOUPB:COUPB1 1 2 3 4

+ W1=0.0606CM W2=0.0606CM W3=0.0263CM W4=0.0263CM W5=0.0263MM
+ L1=0.591CM L2=0.591CM
+ SUB=SUB1

where SUB1 needs to be defined through the .SUB statement.

References

1. R. Mehran, “CAD of Microstrip Filters considering dispersion loss and discontinuity effects,” IEEE Trans. MTT-27, Mar. 1979, pp. 239-245.

2. R. Mehran, “A method of analysis and design of microstrip directional couplers considering dispersion and discontinuity effects,” Proc. of the 1970 Informational Symposium on Computer-Aided Design of the Electrics for Space Application, Bologna (Italy) 1979, pp. 7A-.

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