Title :
On the estimation of power amplifier efficiency for modulated signals
Author :
Amiri, M. Vejdani ; Helaoui, M. ; Ghannouchi, F.M.
Abstract :
This paper presents a new closed form expression for the average efficiency of power amplifiers (PA) driven by modulated signals. Based on an approximation for the PA I-V curve, the PA output power and the DC current are estimated using the probability distribution function (PDF) of the modulated signal. The efficiency as a function of transistor parameters and the bias point is estimated. The closed form values are then compared to the simulated data. It is shown that the estimated efficiency values are in agreement with the simulated ones.
Keywords :
power amplifiers; probability; DC current; I-V curve; bias point; modulated signals; output power; power amplifier efficiency; probability distribution function; transistor parameters; Approximation methods; Mathematical model; Microwave amplifiers; Polynomials; Power amplifiers; Power generation; Random variables; DC Current; Efficiency; Gaussian; Modulated signal; Power Amplifier;
Conference_Titel :
Power Amplifiers for Wireless and Radio Applications (PAWR), 2015 IEEE Topical Conference on
Conference_Location :
San Diego, CA
DOI :
10.1109/PAWR.2015.7139203
