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This work presents an experimental study of the low-frequency dispersion which impairs the performance of microwave active solid state devices. By exploiting low-frequency large-signal excitations (< 10 MHz), the dynamic behaviour of the drain-source current generator is highlighted as function of the operating bias condition and frequency. In order to assess the capability of the proposed investigation...
An experimental investigation of the low-frequency dispersion affecting the behaviour of microwave devices is reported in this work. The study has been carried out by exploiting two different measurement techniques and experiments have been performed on a GaN based HEMT. In particular, bias and frequency dependence of dynamic characteristics has been clearly observed. Moreover, asymmetric behaviour...
A comparison between two different, yet analytical approaches for lookup-table large-signal model construction is presented in this study. Both approaches use the same linear (small-signal) model as the starting point to construct the large-signal model. The first nonlinear model employs the charge- and current-sources to represent the nonlinearity of the active part of the device where the extended...
In this work, measurements of the high frequency as well as the low frequency response of a non-linear microwave circuit are reported. The developed set-up is based on an extension of the LSNA and it enables the simultaneous measurement of baseband response and RF behaviour. Thanks to this capability a direct correlation between the variation of baseband impedance and asymmetry of distortion components...
This work presents a way to determine the complete response, encompassing both the low- and high-frequency components, at the device terminals within a microwave circuit. The measurement set-up is based on an extension of the large-signal network analyser. Experimental results on a GaAs power amplifier are analysed.
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