Presentation - Accounting for High Frequency Transmission Line Loss

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Package Stripline Results modal “flip-flop” meshing limitation dielectric loss only conductor loss only dielectric + conductor Uncorrected HFSS has two modes with nearly identical Beta values - at approximately 4 GHz, the modal results cross over and the recorded alpha effectively “flip-flops”. Corrected version uses mode 1 data be<strong>for</strong>e 4GHz, mode 2 data after 4GHz. Measured data still shows more loss than the HFSS simulations...
Package Stripline - Surface Roughness • In the stripline configuration, current spreads on BOTH sides of stripline • Adjust surface roughness calculation by half to account <strong>for</strong> current distribution SEM cross sectional pictures surface roughness r.m.s = 1um • Surface roughness on bottom side of stripline
Page 1 and 2: Accounting for High Frequency Trans
Page 3 and 4: Zo [Ω] log (S21) dB [dB/m] log (α
Page 5 and 6: Frequency-dependent Loss Mechanisms
Page 7 and 8: PCB Microstrip HFSS Simulations Typ
Page 9: Package Stripline Simulations and M
Page 13 and 14: Package Stripline - Surface Roughne
Page 15 and 16: On-chip Microstrip Simulations and
Page 17: Closing Remarks • Different trans

Presentation - Accounting for High Frequency Transmission Line Loss

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