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This paper introduces the first formulation and approach that enables measurement based non-linear behavioral look-up table transistor models to be frequency scalable. The experimental results on a M/A-COM GaN HFET from 2 GHz to 8 GHz, support theoretical analysis that frequency domain behavioral models defined in the admittance domain have frequency scalable model coefficients. Load-pull results...
This paper combines the advantages of accurate measurement based non-linear behavioral look-up table transistor models with passive embedding networks to develop a scalable large signal model. This approach provides for a more robust utilization of measurement based data models in X-band MMIC design by providing accurate performance predictions as a function of gate periphery and at power levels beyond...
This paper describes a design methodology based on waveform engineering within a harmonic active load-pull system and utilizing the Cardiff Direct Look-Up Table (DLUT) model. The process seeks to address some of the key issues facing designers when using nonlinear simulation of high power microwave amplifiers: model validity, boundary conditions and yield. The application of this process to the design...
The use of active load-pull techniques in the design of high efficiency microwave amplifiers has been well documented. This paper describes how it has been applied to the design of a wideband RFIC gain stage. The technique is particularly relevant in new and developing processes where accurate device models are not available and designers otherwise are often forced to use multiple iterations of a...
The design of high frequency large-signal active devices depends heavily upon the accuracy of the models used by CAD programs. Traditionally, these models have either been physics or equivalent-circuit based, and this paper presents an alternative approach where measured large-signal data is directly incorporated into the design environment. This approach ensures an accurate representation of the...
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