Design of a 670 GHz fourth-harmonic mixer based on Schottky diode
Received:June 10, 2019  Revised:November 14, 2019  download
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Author NameAffiliationPostcode
JI Guang-Yu Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
University of Chinese Academy of Sciences, Beijing 100049, China 
100049
ZHANG De-Hai Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China 
MENG Jin Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China 
YAO Chang-Fei School of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China 
Abstract:For pre-research on ice cloud detection equipment, the design and test of a low conversion loss (CL) 4th-harmonic mixer working at the central frequency of 670 GHz based on an anti-parallel Schottky diode are presented. In order to improve the mixing efficiency, a two-stage local-oscillator (LO) compact-microstrip-resonate-cell (CMRC) low-pass-filter (LPF) is utilized to suppress the second mixing item (), the third harmonic of LO signal(), and RF signal. The LO frequency is only one-quarter of the RF frequency which significantly reduces the complexity and cost of the LO chain. The measurement result shows that the Single-Side-Band (SSB) conversion loss is between 16.7 dB to 22.1 dB from 640 GHz to 700 GHz at room temperature. The minimum conversion loss is 16.8 dB at the RF frequency of 665 GHz.
keywords:terahertz mixer  Schottky diode  fourth-harmonic  compact-microstrip-resonate-cell
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Copyright:《Journal of Infrared And Millimeter Waves》