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Lange Coupler, Electrical Length

Lange Coupler, Electrical Length

Netlist Format

A Lange coupler, physical length instance has the following netlist format:

ALANGExxx n1 n2 n3 n4 N=4 W=val S=val E=val F=val
NW=val DW=val SW=val WL=val ANGC=val ANGO=val
COMPONENT=mslange_electrical SUBSTRATE=substrate_name

n1, n2, n3, and n4 are the names of the nodes attached to the coupler. The entry COMPONENT=mslange_electrical identifies the element.

The entry SUBSTRATE=substrate_name identifies the microstrip substrate model name selected for the design (see Selecting a Microstrip Substrate). See the Microstrip (MS) Substrate for information on this substrate type.

**Lange Coupler, Electrical Length Instance Parameters**
Parameter	Description	Unit	Default
N	Number of lines. Must be 4.	None	4
W	Conductor width	Meter	1e-3
S	Conductor spacing	Meter	1e-3
E	Electrical length	Degree	10e-3
F	Reference frequency for E	Hertz	1e9
NW	Number of bond wires	None	1
DW	Diameter of bind wires	Meter	25.4e-6
SW	Spacing between bond wires	Meter	0.0
WL	Width of connecting lines	Meter	1e-3
ANGC	Miter angle of center arm bends	Degree	45
ANGO	Miter angle of outer arm bends	Degree	45

Netlist Example

ALANG1 Port1 Port2 Port3 Port4 N=4 W=1e-3 S=0.2e-3 F=2.5e9
+ COMPONENT=mslange_electrical SUBSTRATE=FR4

where FR4, the selected layout technology or substrate type, has a definition such as:

.SUB FR4 MS( H=7.6200e-004 Er=4.4 TAND=0.02 TANM=0
+ MSat=0 MRem=0 HU=0.00508 MET1=1.72413793103448
+ T1=1.7145e-005 RGH=0mil)

Notes

1. The bond wire is considered to be a semicircular shape with diameter equal to the separation between the end points..

2. Taking port 1 to be defined between node 1 and ground (node 0), the remaining ports are defined between the following nodes:
Coupled port: Node n2 and GND
Isolated port: Node n3 and GND
Through port: Node n4 and GND

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