A scalable lossy substrate model for nanoscale RF MOSFET noise extraction and simulation adapted to various pad structures

Jyh-Chyurn Guo*, Y. H. Tsai

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

A broadband and scalable lossy substrate model is developed and validated for nanoscale RF MOSFETs of different finger numbers and adopting various pad structures such as lossy, normal, and small pads. The broadband accuracy is justified by good match with S- and Y-parameters up to 40 GHz. The measured noise characteristics in terms of four noise parameters can be accurately simulated up to 18 GHz. The scalable lossy substrate model can consistently predict the abnormally strong finger number dependence and nonlinear frequency response of noise figure (NFmin) revealed by the devices with lossy pads. Furthermore, the scalable model can precisely distribute the substrate loss between the transmission line (TML) and pads of various metal topologies and the resulted excess noises. The enhanced model provides useful guideline for appropriate layout of pads and TML to effectively reduce the excess noises. The remarkably suppressed noise figure to ideally intrinsic performance can be approached by the small pad in this paper.

Original languageEnglish
Title of host publicationProceedings of the 2007 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2007
Pages299-302
Number of pages4
DOIs
StatePublished - 2 Oct 2007
Event2007 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2007 - Honolulu, HI, United States
Duration: 3 Jun 20075 Jun 2007

Publication series

NameDigest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
ISSN (Print)1529-2517

Conference

Conference2007 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2007
CountryUnited States
CityHonolulu, HI
Period3/06/075/06/07

Keywords

  • Lossy substrate
  • Noise
  • Pad
  • RF MOSFET

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    Guo, J-C., & Tsai, Y. H. (2007). A scalable lossy substrate model for nanoscale RF MOSFET noise extraction and simulation adapted to various pad structures. In Proceedings of the 2007 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2007 (pp. 299-302). [4266435] (Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium). https://doi.org/10.1109/RFIC.2007.380887