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Correction of Optical Delay Line Errors in Terahertz Time-Domain Spectroscopy
Open AccessArticle

Design and Measurement of a 0.67 THz Biased Sub-Harmonic Mixer

1
CAS Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
*
Author to whom correspondence should be addressed.
Electronics 2020, 9(1), 161; https://doi.org/10.3390/electronics9010161
Received: 20 December 2019 / Revised: 7 January 2020 / Accepted: 9 January 2020 / Published: 15 January 2020
(This article belongs to the Special Issue Terahertz Technology and Its Applications)
To effectively reduce the requirement of Local Oscillator (LO) power, this paper presents the design and measurement of a biased sub-harmonic mixer working at the center frequency of 0.67 THz in hybrid integration. Two discrete Schottky diodes were placed across the LO waveguide in anti-series configuration on a 50 μm thick quartz-glass substrate, and chip capacitors were not required. At the driven of 3 [email protected] GHz and 0.35 V, the mixer had a minimum measured Signal Side-Band (SSB) conversion loss of 15.3 dB at the frequency of 667 GHz. The typical conversion loss is 18.2 dB in the band of 650 GHz to 690 GHz.
Keywords: bias; sub-harmonic mixer; anti-series; Schottky diode; conversion loss bias; sub-harmonic mixer; anti-series; Schottky diode; conversion loss
MDPI and ACS Style

Ji, G.; Zhang, D.; Meng, J.; Liu, S.; Yao, C. Design and Measurement of a 0.67 THz Biased Sub-Harmonic Mixer. Electronics 2020, 9, 161.

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