红外与毫米波学报, 2019, 38 (6): 695, 网络出版: 2019-12-27   

基于肖特基二极管的四次谐波混频器

Design of a 670 GHz fourth-harmonic mixer based on Schottky diode
作者单位
1 Key Laboratory of Microwave Remote Sensing, National Space Science Center, Chinese Academy of Sciences, Beijing 0090, 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
摘要
针对冰云探测设备的预研,详细介绍了一款基于肖特基二极管的低变频损耗670 GHz四次谐波混频器.为了提升混频效率,采用两级紧凑微带共振单元(CMRC)本振低通滤波器来抑制射频信号、本振三次谐波及二次谐波混频产物.由于本振频率仅为射频频率的四分之一,大大降低了本振链路的复杂度和成本.测试结果表明,在640~700 GHz频带内单边带变频损耗为16.7~22.1 dB,在665 GHz最优单边带变频损耗为16.8 dB.
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 (f=2*fLO-fRF), the third harmonic of LO signal(f=3*fLO), 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.

纪广玉, 张德海, 孟进, 姚常飞. 基于肖特基二极管的四次谐波混频器[J]. 红外与毫米波学报, 2019, 38(6): 695. Guang-Yu JI, De-Hai ZHANG, Jin MENG, Chang-Fei YAO. Design of a 670 GHz fourth-harmonic mixer based on Schottky diode[J]. Journal of Infrared and Millimeter Waves, 2019, 38(6): 695.

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