| Units of the test structure | Details |
| Single spiral structure | Width of the trace: 1 mm Number of turns: 3 Distance between the center and the extreme trace: 10 mm |
| Total elements of the fractal inductor | Number of spirals: 11 Distance between the center-to-center of the spirals: 35 mm |
| PCB substrate | Material: Fiber-glass FR 408 Thickness: 1 mm Dielectric constant: 3.75 Loss-tangent: 0.012 at GHz spectrum |