A novel fast search algorithm for an active load-pull measurement system

Abstract

In this paper a novel fast search algorithm for an active load-pull algorithm is presented. This algorithm is based on the fact that it is possible to fit, with a minimum number of measurements, the desired parameter, for instance the output power, as function of the load reflection coefficient. The fitted function is used to make a prediction of the location of the optimum load reflection coefficient. Application of the novel load-pull algorithm has resulted in a 8 time reduced measurement time. In this paper also the load-pull measurement system installed at TNO-FEL and some measurement results obtained with the described search algorithm are discussed.