A 340 GHz Doubler Featuring >57 mW Output Power Based on Improved Design Methodology with Analytic Diode Pair Behavioral Model

This paper presents a novel diode behavioral model, which is capable of providing dynamic electrical connection of each junction pair and independent ports for different field modes. Correspondingly, an improved methodology has been developed. This methodology improves the conventional mode-decoupling method by introducing impedance multipliers to match the developed diode-pair modsel, thereby providing a generally applicable approach to solve the impedance matching problems of multi-mode networks. Finally, a 340 GHz doubler based on the four-port balanced configuration has been determined based on the proposed method, featuring additional suppression on the fourth-order harmonic. Even fabricated with over-sized discrete diodes, the achieved module could provide a maximum power of 57.2 mW at 341.2 GHz, which represents the highest reported output power in this band to the author’s knowledge.