L. Pace, A. Salvucci, S. Fenu, W. Ciccognani, P.E. Longhi, S. Colangeli, E. Limiti, P. Frijlink, M. Renvoisé, “A Times-4 Frequency Multiplier from K- to W-band”, PIERS, Rome (Italy), 17-20 June 2019.