Such a line can be useful when calculating Log-periodic antenna, in the event that the collecting line is made of two strips of foil material, or based on double-sided PCB. For example, as in the picture:
Schematic representation of a symmetrical paired stripline transmission line:
Source code JavaScript:
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The calculation, depending on the ratio a / b, is doing according to one of the two following formulas:
To verify and evaluate the error of this calculator, the characteristic impedance of a number of stripline pair lines with the dielectric constant of the substrate εr=4.4 were calculated, using the electromagnetic simulator ANSYS 2D EXTRACTOR. The calculation results are presented in the form of tabular data:
Literature:
- Brian C Wadell, "Transmission Line Design Handbook", 1991 Artech House Inc., p. 71;
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