A Novel 300–520 GHz TripIer with 50 % Bandwidth for Multi-pixel Heterodyne SIS Array Local Oscillator Signal Generation

We report on a novel frequency tripler working on a very broad frequency range. Its configuration combines the advantage of antiparallel pair of diodes for the confinement of the second harmonic signal, thin substrate transmission lines for uniform impedance matching, as well as varistor mode operating leveraged by the presence of a DC bias. Efficiency of 5 % over 300 GHz up to 520 GHz and an output power going from 0.5 mW to 1 mW provided within a single chip only offer the possibility to feed up to 8 pixels Superconductor-Insulator-Superconductor (SIS) mixers.