International Journal of Terahertz Science and Technology
  TST >> Vol.4, No.3, September 2011: PP. 90-94

The Design of a 200-240-GHz Sub-Harmonic Mixer Based on RAL's Planar Schottky Diodes

Bo Zhang 1*, Byron Alderman 2, Zhe Chen 1, Yong Fan 1, Xiaofan Yang 1 and Xiaobo Yang 1
1 EHF Key Laboratory of Fundamental Science Universtity of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P.R.China
2 Millimetre-Wave Technology Space Science and Technology Department STFC Rutherford Appleton Laboratory Harwell Science and Innovation Campus Didcot, OX11 0QX
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Abstract: This paper presents the design of a fixed-tuned 200-240-GHz wide-band sub-harmonic mixer. The mixer is based on an anti-parallel pair of GaAs Schottky diodes fabricated at Rutherford Appleton Laboratory (RAL). The circuits are fully integrated with the RF/IF filter and flip-chipped onto a suspended quartz-based substrate. A best conversion loss of 5.9 dB was achieved with 5mW of LO power at 207 GHz. Over an RF band of 200-240 GHz, the conversion loss is below10dB. This state-of-the-art optimization is attributed to lower parasitic devices and a low-loss waveguide circuit.

Keywords:Sub-harmonic mixer, Planar Schottky diodes, Terahertz-wave, Wide-band.

Published: 2011-9-30

Acknowledgments: The authors thank Dr. Byron Alderrman and Dr. Hui Wang from RAL for technical advices. This work is sponsored in part by the National High-Technology Research and Development Program of China (863 Program) and in part by the National Natural Science Foundation of China under Grant Nos. 60671034 and 60901022.

Cite this article:
Bo Zhang, Byron Alderman, Zhe Chen, Yong Fan, Xiaofan Yang and Xiaobo Yang. The Design of a 200-240-GHz Sub-Harmonic Mixer Based on RAL's Planar Schottky Diodes[J]. International Journal of Terahertz Science and Technology, 2011, Vol.4, No.3: 90-94.  DOI:10.11906/TST.090-094.2011.09.12




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