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……