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Large-signal and Distributed-based Model of mm-wave Multi-Finger pHEMTs using Time-Domain Technique

Aliakbariabar, Hanieh LU ; Abdipour, A. and Avolio, G (2017) In International Journal of RF and Microwave Computer-Aided Engineering 27(7).
Abstract
The finite-difference time-domain (FDTD) method is used for the large-signal modeling of a multifinger pHEMT, which is considered as five nonlinear coupled distributed transmission lines. The developed model, which is based on the exact physical layout of multifinger pHEMT, not only accurately describes the propagation effects along the electrodes at higher frequencies but it also includes major nonlinearities of the I–V and Q–V characteristics. Using the transmission line theory, a proper nonlinear equivalent lumped circuit model is allocated for the differential length of the quintuple-line transistor and the nonlinear active multiconductor transmission line (NAMCTL) equations are derived. These nonlinear, coupled differential equations... (More)
The finite-difference time-domain (FDTD) method is used for the large-signal modeling of a multifinger pHEMT, which is considered as five nonlinear coupled distributed transmission lines. The developed model, which is based on the exact physical layout of multifinger pHEMT, not only accurately describes the propagation effects along the electrodes at higher frequencies but it also includes major nonlinearities of the I–V and Q–V characteristics. Using the transmission line theory, a proper nonlinear equivalent lumped circuit model is allocated for the differential length of the quintuple-line transistor and the nonlinear active multiconductor transmission line (NAMCTL) equations are derived. These nonlinear, coupled differential equations are numerically solved using the FDTD method. The proposed model is applied to a 100 nm GaAs pHEMT and the simulation results are compared with the results of conventional sliced model in Keysight ADS simulator. The developed transient nonlinear model accurately predicts both the S-parameters (1–150 GHz) and large-signal power performances especially at millimeter wave frequency range. The proposed model can be useful in design and analysis of various types of high-frequency nonlinear integrated circuits. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
International Journal of RF and Microwave Computer-Aided Engineering
volume
27
issue
7
publisher
Wiley Online Library
ISSN
1099-047X
DOI
10.1002/mmce.21120
language
English
LU publication?
no
id
b321ce38-829d-4f60-9e20-54a15fb4ad0e
date added to LUP
2017-12-13 14:19:48
date last changed
2017-12-14 12:53:23
@article{b321ce38-829d-4f60-9e20-54a15fb4ad0e,
  abstract     = {The finite-difference time-domain (FDTD) method is used for the large-signal modeling of a multifinger pHEMT, which is considered as five nonlinear coupled distributed transmission lines. The developed model, which is based on the exact physical layout of multifinger pHEMT, not only accurately describes the propagation effects along the electrodes at higher frequencies but it also includes major nonlinearities of the I–V and Q–V characteristics. Using the transmission line theory, a proper nonlinear equivalent lumped circuit model is allocated for the differential length of the quintuple-line transistor and the nonlinear active multiconductor transmission line (NAMCTL) equations are derived. These nonlinear, coupled differential equations are numerically solved using the FDTD method. The proposed model is applied to a 100 nm GaAs pHEMT and the simulation results are compared with the results of conventional sliced model in Keysight ADS simulator. The developed transient nonlinear model accurately predicts both the S-parameters (1–150 GHz) and large-signal power performances especially at millimeter wave frequency range. The proposed model can be useful in design and analysis of various types of high-frequency nonlinear integrated circuits.},
  author       = {Aliakbariabar, Hanieh and Abdipour,  A.  and Avolio, G},
  issn         = {1099-047X},
  language     = {eng},
  number       = {7},
  publisher    = {Wiley Online Library},
  series       = {International Journal of RF and Microwave Computer-Aided Engineering},
  title        = {Large-signal and Distributed-based Model of  mm-wave  Multi-Finger  pHEMTs  using  Time-Domain  Technique},
  url          = {http://dx.doi.org/10.1002/mmce.21120},
  volume       = {27},
  year         = {2017},
}