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System Simulator >
System Component Models >
Stripline >
SL Offset Coupled Lines, Electrical Length (SLOCLE)

SL Offset Coupled Lines, Electrical Length (SLOCLE)

Properties	Description	Units	Default	Range
W	Conductor width	m	Required	> 0
S	Vertical spacing between the conductors	m	Required	0 < S+2T < B
WC	Conductor offset	m	Required	(-¥,¥)
E	Electrical length	deg	Required	(-¥,¥)
F	Reference frequency for E, AE, and AO	Hz	Required	> 0
AE	Even mode attenuation	dB/wavelength	0.0	³ 0
AO	Odd mode attenuation	dB/wavelength	0.0	³ 0
sub	Substrate name	none	Required	string

Notes

1. The following conditions should be satisfied: -2.5 < WC/B £ W/B, and W/(B-S) ³ 0.35, where B is the ground plane spacing defined in the .SUB statement.

2. The results may not converge for all values of WC/B.

3. If WC/W is larger than or equal to 0.9, the conductor loss attenuation factors (AE and AO) are estimated by the program, unless the user specifies them in the input.

4. If WC/W is less than 0.9, the user has to define AE and AO if their effect is to be taken into consideration. They are not calculated by the program.

5. Metallization thickness is taken into account in the analysis.

Netlist Form

SLOCLE:NAME n1 n2 n3 n4 W=val S=val WC=val
+ E=val F=val [AE=val] [AO=val] SUB=label

Netlist Example

SLOCLE:OCLE2 1 2 3 4 W=50MIL S=40MIL WC=10MIL E=45 F=750MHZ
+ AE=0.2 AO=0.2 SUB=SUB1

where SUB1 needs to be defined in the corresponding .SUB statement.

References

1. J. P. Shelton, “Impedances of Offset Parallel Coupled Strip Transmission Line,” IEEE Trans. on MTT, Jan. 1966, pp. 7-15, and correction in MTT, May 1966, p. 249.

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