Obtaining quasi-static models using a frequency domain extraction methodology

© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”This contribution illustrates how a realistic nonlinear quasi-static model for FET-type devices can be extracted using an original frequency domain extraction technique. An ideal ‘made-up’ device is built from the measured bias dependence of a GaN medium power device. This ideal device is excited by two ideal voltage sources and its response (drain current) is used to illustrate how the extraction procedure can separate conduction and displacement current components provided the total current spectrum (or, alternatively, waveform) and control voltages are known.This work has been supported by the Junta de Andalucía under Grant (TIC2012-1237). Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Caracterización de modelos no-lineales casi-estáticos a partir de las formas de onda en régimen de gran señal

A method to extract the conduction and displacement components of nonlinear quasi-static current sources controlled by two variables is concisely described. The method is numerically tested by means of two different analytical examples of nonlinear current sources. The obtained results clearly illustrate its performance as well as its potentiality in the nonlinear modelling of FET/HEMT devicesEste trabajo ha sido financiado por la Junta de Andalucía por medio del proyecto TIC2012-1237. Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Extracción de modelos casi-estáticos para dispositivos no-lineales a partir de medidas en el dominio de la frecuencia

In this contribution an extraction method already proposed by authors and suitable for FET-type devices that could be represented by a quasi-static model is illustrated. For the first time, the method is applied to a FET embedded in a parasitic shell and fed at each port with sources that include internal impedances. The main impact of adding these elements is that intrinsic voltages that control the nonlinear current and charge sources of the model to be extracted are not ideal monochromatic signals. The results show that the extraction method works with these more realistic control voltages at the expense of an important reduction of the range of control voltages with respect to the ideal case. The dependence of the results on the input power level is also assessed. Results demonstrate that the method is still valid under realistic conditions and it is ready to be applied to experimental results.Este trabajo ha sido parcialmente financiado por el Plan Propio de Investigación y Transferencia de la Universidad de Málaga-Andalucia Tech. Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Radio interference analysis tool based on GNU Radio

Avoiding interference is one of the main challenges in radio communications. Interference hunting is usually done with costly instruments. In this work, a cost efficient portable tool is described for interference analysis that is based on software defined radio. A generic radio board implements the RF front end, while flexible signal processing is carried out on a personal computer. The proposed tool analyses spectrum characteristics spanning from 70 MHz to 6 GHz band, detects radio interference signals and helps to identify the type of radio technology used by the source transmitter.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Procesado masivo y automático de trazas en redes celulares

The introduction of new services in mobile communications usually requires extensive evaluation campaigns. Even though new services and devices may have undergone conformance testing, it is important to ensure they do properly work in real live networks, where some parameters, signalling procedures or timer values may differ from those used in conformance testing. It is also important to diagnose error sources. This paper describes a tool that automatically analyses traces captured by the mobile terminal. Its design addresses two main challenges: the efficient handling of the large amount of information captured by the terminal and the extraction of relevant information from traces generated by different sources.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Spanish Government (Ministerio de Economía y Competitividad) and FEDER under grant TEC2016-80090-C2-1-