Signal Integrity Report – IT3 (25mm)
Page 5
Figure 3 shows the cross section of interposer. The loosely-coupled design gives 50.24 ohm
impedance for single-ended signals and 98.87 ohm impedance for differential signals, with process
variations. The line-to-line coupling is 0.80%, and the pair-to-pair coupling is 0.36%.
Figure 3 Cross-section of interposer
3. Differential Signals
3.1 Frequency-Domain Modeling
3.1.1 S parameters (connector only)
Figure 4 shows the simulation model for IT3-25 mm (connector only). We used symmetry to
combine four quarter models created from HFSS into a 60-port single-ended Touchstone file. The
60-port single-ended model was then converted into a 30-port differential Touchstone file.
Figure 4 IT3-25mm simulation model
HRS [ HIROSE ELECTRIC ]
