1.9-3.2 THz Schottky Based Harmonic Mixer Design and Characterization
Paper in proceedings, 2015

The development of a Schottky diode based 1.9 -3.2 THz harmonic mixer with high conversion efficiency is described. The mixer will be used as part of an ambient receiver to enable phase locking of Quantum Cascade (QC) lasers. The mixer consists of quartz based LO, IF circuits and a GaAs based THz circuit with integrated diode. The RF input is a diagonal horn coupled to WM-86 rectangular waveguide, with size 86 μm by 43 μm. The waveguide is coupled to the diode using a waveguide probe with integral DC bias line. Measurements of the mixer were performed using a 2 THz solid state source and 2.5 THz Quantum Cascade(QC) laser, and yielded a conversion loss of 30 dB for 3rd harmonic mixing. This result is a 15 dB improvement from a previous harmonic mixer that was presented by our group.

QC laser

Video Response


Schottky Diode

Harmonic Mixer

Conversion Loss


Berhanu Bulcha

University of Virginia

Virginia Diodes, Inc.

Jeffrey Hesler

University of Virginia

Vladimir Drakinskiy

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Jan Stake

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Scott Barker

University of Virginia

Proceedings of the 45th European Microwave Conference, Paris, France, 7-10 September 2015


Areas of Advance

Information and Communication Technology


Nanofabrication Laboratory

Subject Categories

Other Electrical Engineering, Electronic Engineering, Information Engineering





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