A 620–690 GHz sub-harmonic mixer based on monolithic GaAs integrated schottky diodes

In this paper, a 620-690GHz sub-harmonic mixer using monolithic GaAs integrated schottky diodes is presented in order to remove the mismatch caused by manual assembly of the flip chip diode. The monolithic microwave integrated circuit integrates a Schottky anti-parallel diodes pair in a longitudinal configuration. We mostly analyzed the influence caused by diode position offset and conductive adhesive thickness on the performance of the mixer, which shows the necessity of monolithic integration technology. In 620GHz to 690 GHz simulated results of the mixer had achieved less than 9dB of conversion loss and 920K for DSB noise temperature within the bandwidth.