Wide Band Comparisons
This page discusses my reported characteristic of fractals: their being wide-banded in frequency response. This is achieved through the increased (or perhaps just typical) volume of wire being treated as a high Z source. That this high Z appears to be equal that of free space is attractive, suggesting perhaps efficiency of coupling to a field. Or perhaps not. In any event the more compelling characteristic is where the SWR drops to a baseline level and maintains that level over a considerable range of frequency. Such an example is found in the Koch Triadic curve. It is also evident in the Triangle Sweep. Each of these designs' wire consumption was boosted to 64 meters to bring the wide band characteristic into the HF Band frequencies.
However, this same exemplar, the Koch Triadic, also shows a distinct increase in mismatching low frequencies as the order of iteration grows. Reviewing this design in reverse iteration order: the third iteration shows a distinct ramp down in SWR values until the 1.2 floor is encountered.
The Triangle Sweep (I call by various names: Model B, Dragon) shows a more dramatic drop to a lower floor and holding to it for the longest span of frequency.
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 Triadic Koch 1st iteration 377 Ohm SWR |
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 Triadic Koch 2nd iteration 377 Ohm SWR |
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 Triadic Koch 3rd iteration 377 Ohm SWR |
 Model B 2nd iteration 377 Ohm SWR |
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 Model Q (Sierpinski) 2nd iteration 377 Ohm SWR (50 - 100 MHz) |
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