These transmission line models accurately simulate frequency-dependent

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These transmission line models accurately simulate frequency-dependent

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Transmission Line Model
These transmission line models accurately simulate frequency-dependent behavior Coilcraft surface mount "Spring" core inductors within frequency limits shown accompanying table each individual inductor. They based de-embedded measurements using 2-port network analyzer. model schematic, shown below, combines ideal transmission line model with lumped elements. Each model should analyzed only whole input output ports. Conclusions based individual lumped element values erroneous. individual element values listed table each individual spring inductor.
Micro Springs
Table Test
Size 0906 1606 Width (inch 0.040 1,016 0.120 3,048
Calibration plane
Brass ground plane
Figure Test Setup
Ohm) wide traces tinned gold over thick alumina, were included gap. TRL* calibration plane also illustrated Figure lumped element values were determined matching simulation model average measurements. This method results model that represents closely possible typical frequency-dependent behavior component within specified frequency limits model. lumped element models were used generate 2-port S-parameters therefore give identical results with same number simulation frequency points. S-parameters available site
Effects different circuit board traces, board materials, ground planes interactions with other components included. They will have significant effect when comparing simulation measurements individual inductors using other production verification instruments fixtures. Typically, Self-Resonant Frequency (SRF) inductor model will higher than measurement component mounted circuit board. parasitic reactive elements circuit board fixture will effectively lower circuit resonant frequency, especially very small inductance values. Data sheet specifications based typical production measurements. These models based de-embedded 2-port measurements described below, model results different from data sheet specifications.
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Lumped Element Modeling Method
measurements were made over brass ground plane with each component centered over gap, illustrated Figure width each size component given Table test pads were
Specifications subject change without notice.
Document 341-1 Revised 05/21/03
Document 341-2
Transmission Line Model Coilcraft Micro SpringsPart number Frequency limit Model (MHz) Lower Upper (pF) (degrees) (MHz)
0906-2 0906-3 0906-4 0906-5 1606-6 1606-7 1606-8 1606-9 1606-10
18000 16000 11000 8000 11000 9500 9000 7500 6500
0.079 0.000 0.650 4.606 10.71 1.026 2.568 3.278 5.453
0.0698 0.0968 0.1524 0.2201 0.2170 0.2852 0.3529 0.3681 0.4695
0.0660 0.0720 0.0899 0.1276 0.0589 0.0830 0.0526 0.0758 0.0791
104.8 130.5 153.1 158.3 162.9 160.5 196.8 189.3 212.3
30.47 37.80 42.80 51.19 57.83 68.22 70.07 84.30 100.3
5031 5479 4750 4307 4760 4349 4451 4686 4956
Specifications subject change without notice.
Document 341-2 Revised 05/21/03

These transmission line models accurately simulate frequency-dependent

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