MMndr (Microstrip Meander Line)

Symbol

Parameters

Name	Description	Unit	Default
Subst	Microstrip substrate name	None	MSub1
F	Design frequency	GHz	1
Zo	Desired characteristic impedance	Ohm	50
Lphys	Physical line length (set to zero if Lelec specified)	mil	0
Lelec	Line length in wavelengths (set to zero if Lphys specified)	None	0.25
WR	Bounding rectangle width	mil	1000
HR	Bounding rectangle height	mil	1000
Delta	Length added to vertical lines for tuning performance	mil	0

Notes

1. MMndr designs a meandering microstrip line given the substrate, desired characteristic impedance, physical or electrical length, and maximum rectangular dimensions of the line.
2. The line input and output ports are at the center of the rectangle on the side characterized by HR.
3. The final width and height of the bounding box can be smaller than that specified depending on the desired length.
4. For proper operation, either Lphys or Lelec must be zero.
5. Refer to the discussion of the MLIN component in the Microstrip Components documentation for a more detailed description of the model used for this component.
6. The optimization minimizes the absolute difference between the transmission phase and that resulting from the specified length. Only the vertical dimension is optimized, and since the corners tend to add excess phase delay the resulting height will be slightly smaller than specified.
7. A SmartComponent subnetwork is empty until the Design Assistant is used to generate the design. Refer to Design Assistant.

Example

A MMndr component was used to design a 1-wavelength line in a 1-inch by -inch square area at a center frequency of 1 GHz. Optimization yielded a value of Delta = −10.469 mil.