... conditions: a first one corre-sponding to the weighting of the second and third-harmonic contribution according tothe maximum value of δ (k2,k3), another one obtained with harmonics correspondingto ... input harmonic terminations on high efficiency Class-B and Class-Foperation of PHEMT devices’, IEEE MTT-S Symp. Dig., 1998, pp. 1611–1614.[21] K. Jeon, Y. Kwon, S. Hong, ‘Input harmonics control ... reference one and named Amp B, was designed in order to have the secondharmonic (40 GHz) short-circuited at both the input and the output ports. On the contrary,the harmonic manipulated version,...