M. Kalantari - Communication Engineering, Khaje Nasir Toosi University of Technology
Abbas Pourzaki - Department of Electrical and Electronic Engineerin, Asrar higher Institute
K. Mafi-Nezhad - Engineering, Ferdowsi University of Mashhad

In recent years, nonlinear circuit analysis techniques have been extensively investigated. One of the most important reasons is the application development of solid-state devices at microwave frequencies. Different methods have been used to analysis large signal behavior of these devices. In this paper load-pull curves (one of design requirement) are obtained using Volterra series. The main advantage of this technique is shortening the time of computations for weak nonlinear analysis in cases such as Class A power amplifiers. The proposed procedure has been coded in MATLAB. Using iterative methods, loads with constant output power have been obtained. Finally the results are compared to experimentally measured values and a fair degree of calculation between them is observed.

Volterra Series, Nonlinear analysis, Power amplifier, Load, Pull