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System Simulator >
System Component Models >
Microstrip >
MS Cross Junction (MSCROSS)

MS Cross Junction (MSCROSS)

Properties	Description	Units	Default	Range
W1	Width of line connected to node n1	m	Required	> 0
W2	Width of line connected to node n2	m	Required	> 0
W3	Width of line connected to node n3	m	Required	> 0
W4	Width of line connected to node n4	m	Required	> 0
NSUM	Number of eigenmodes used for the field expansion	none	4	[1,9]
sub	Substrate name	none	Required	string
CoSimulator	Simulation engine	none		Planar EM
CoSimStackup	Stackup used for simulation	none	Layout Stackup	Layout Stackup, Footprint stackup, Substrate

Notes

1. The following condition should be satisfied to get accurate results with default value of NSUM (NSUM=4):
H/l_g< 1 (for all widths, W=W1, W2, W3, and W4), where l_g is the guide wavelength of the dominant mode.

2. The angle between the lines is 90°.

3. Increasing NSUM will improve the accuracy, but will increase the analysis time. Setting the default value to NSUM=4 has proven to provide sufficient accuracy (±3%) and good analysis time.

Netlist Form

MSCROS:NAME n1 n2 n3 n4 W1=val W2=val W3=val W4=val [NSUM=val] SUB=label

Netlist Example

MSCROS:CROSS 1 2 3 4 W1=30MIL W2=50MIL W3=30MIL W4=50MIL SUB=SUB1

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

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