APLICACIÓN EN MATLAB DE UN SISTEMA ENVELOPE LOAD PULL PARA CARACTERIZACIÓN DE IMPEDANCIAS (MATLAB APLICATION OF AN ENVELOPE LOAD PULL SYSTEM FOR IMPEDANCE CHARACTERIZATION)
Resumen
En este artículo se presenta la simulación de un sistema de cargas activas en el software Simulink, con el método Envelope Load Pull, con el cual se realizan mediaciones precisas para caracterizar las impedancias de un dispositivo. El desacople de impedancias en alta frecuencia genera una alteración en magnitud y fase de la señal incidente la cual alterara la información que se desea transmitir. Para evitar este efecto se debe acoplar una impedancia que permita tanto una máxima transferencia de potencia como contrarrestar las reactancias del sistema, para esto, se debe caracterizar el sistema en términos de corriente, voltaje o potencia para dar una descripción precisa del comportamiento de la impedancia del dispositivo. Muchos métodos para realizar la caracterización consisten en evaluar en comportamiento de la señal reflejada al presentarle diferentes cargas, ya sea, pasivamente al presentarle resistencias y reactancias o activamente al modificar la salida con señales de voltaje.
Palabras Clave: Caracterización de impedancias, cargas activas, envelope load pull, Matlab, simulación.
Abstract
This article presents the simulation of an active load system in the Simulink software, using the Envelope Load Pull method, with which precise measurements are performed to characterize the impedances of a device. The decoupling of high frequency impedances generates an alteration in magnitude and phase of the incident signal which alters the information to be transmitted. To avoid this effect, an impedance that allows both maximum power transfer and counteract the reactions of the system must be coupled, for this, the system must be characterized in terms of current, voltage or power to give an accurate description of the behavior of the impedance. Of the device. Many methods to perform the characterization consisting in evaluating the behavior of the reflected signal when presenting different loads, either passively when presenting resistances and reactances or actively when modifying the output with voltage signals.
Keywords: Active loads, envelope load pull, Impedance characterization, Matlab, simulation.
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