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GaN HEMT Modeling Including Trapping Effects Based on Chalmers Model and Pulsed S-Parameter Measurements

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GaN HEMT Modeling Including Trapping Effects Based on Chalmers Model and Pulsed S-Parameter Measurements (Volumen 46) (Tienda española)

Peng Luo (Autor)


Lectura de prueba, PDF (610 KB)
Indice, PDF (520 KB)

ISBN-13 (Impresion) 9783736999060
ISBN-13 (E-Book) 9783736989061
Idioma Inglés
Numero de paginas 160
Edicion 1.
Serie Innovationen mit Mikrowellen und Licht. Forschungsberichte aus dem Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik
Volumen 46
Lugar de publicacion Göttingen
Lugar de la disertacion BTU Cottbus
Fecha de publicacion 09.01.2019
Clasificacion simple Tesis doctoral
Area Ingeniería eléctrica
Palabras claves Large-Signal Model Types,GaN Hemt,Outline of the Thesis,A1GAN/GaN,Ham,Extrinsic,Parameter,Extraction,Nonlinear,Circuit,Modeling,Capacitances,Large-signal,Physical,Mechanism,Trapping Effects,Gate-Lag,Drain-Lag,Published Models,Pulsed Measurements,Device,Self-Heating,Reduction,Traps Isolation,Intrinsic,Verification, Load Pull Performance,Model Limitations,Output,Conductance Match,Abbreviations,

GaN HEMTs are regarded as one of the most promising RF power transistor technologies thanks to their high-voltage high-speed characteristics. However, they are still known to be prone to trapping effects, which hamper achievable output power and linearity. Hence, accurately and efficiently modeling the trapping effects is crucial in nonlinear large-signal modeling for GaN HEMTs.
This work proposes a trap model based on Chalmers model, an industry standard large-signal model. Instead of a complex nonlinear trap description, only four constant parameters of the proposed trap model need to be determined to accurately describe the significant impacts of the trapping effects, e.g., drain-source current slump, typical kink observed in pulsed I/V characteristics, and degradation of the output power. Moreover, the extraction procedure of the trap model parameters is based on pulsed S-parameter measurements, which allow to freeze traps and isolate the trapping effects from self-heating. The model validity is tested through small- and large-signal model verification procedures. Particularly, it is shown that the use of this trap model enables to dramatically improve the large-signal simulation results.