Design of a 664GHz wideband sub-harmonic mixer based on MASTER technology

In this paper, a terahertz wideband sub-harmonic mixer based on the Schottky anti-parallel diodes pair and MASTER technology is presented. The mixer circuit is fabricated on a 0.05mm quartz substrate including Schottky anti-parallel diodes pair, RF/LO transition, IF matching networks and filtering circuits. The diode circuit is fabricated on a quartz substrate directly by MASTER technology. The research analyzed the topology of sub-harmonic mixer, device modeling of Schottky diodes, the 3D electromagnetic passive circuits and the mixer circuitry with optimum performance. Conversion loss of the mixer is less than 10dB range from 513GHz to 705GHz when the LO pumped power was 5dBm at 260GHz to 400GHz.