Challenges in Compact Modeling...

Challenges in Compact Modeling for RF and Microwave ApplicationsChallenges in Compact Modeling for RF and Microwave Applications
Ali M Niknejad M. Dunga, B. Heydari, H. Wan, C.H. Lin, S. Emami, C. Doan, X. Xi, J. He, C. Hu The BSIM and BWRC Research Teams Berkeley Wireless Research Center University of California, Berkeley
WCM 2005

Outline


Introduction mm-Wave CMOS Transistor modeling


Small signal Large signal Noise Transmission lines Inductors Transformers



Modeling passive devices



WCM 2005

Conclusion

Compact Modeling Woes


RF designers today don’t trust their CMOS compact models:






“CMOS LNA noise figure 0.5 dB higher than simulated.” “VCO noise figure 2.2 dB higher than simulated.” “PA output power 2 dB lower than expected.” “Mixer IIP3 does not match measurements. Trend versus bias is wrong and input power is wrong!” “Inpu