Volume 31 Issue 3
May  2022
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HE Yue, LIU Ge, LIU Juan, LIN Changxing, SU Wei. A 220 GHz Orthogonal Modulator Based on Subharmonic Mixers Using Anti-Paralleled Schottky Diodes[J]. Chinese Journal of Electronics, 2022, 31(3): 562-568. doi: 10.1049/cje.2021.00.270
Citation: HE Yue, LIU Ge, LIU Juan, LIN Changxing, SU Wei. A 220 GHz Orthogonal Modulator Based on Subharmonic Mixers Using Anti-Paralleled Schottky Diodes[J]. Chinese Journal of Electronics, 2022, 31(3): 562-568. doi: 10.1049/cje.2021.00.270

A 220 GHz Orthogonal Modulator Based on Subharmonic Mixers Using Anti-Paralleled Schottky Diodes

doi: 10.1049/cje.2021.00.270
Funds:  This work was supported by National Key R&D Program of China (2018YFB1801504) and the President Funding of China Academy of Engineering Physics (YZJJLX2018009)
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  • Author Bio:

    was born in 1988. He received the B.E. and M.S. degrees in electronic engineering from University of University of Electronic Science and Technology of China, in 2010 and 2013, respectively. He is a Ph.D. candidate of China Academy of Engineering Physics (CAEP). His current research involves mmWave/Terahertz solidstate mixers and multipliers based on Schottky diodes. (Email: heyue1109@163.com)

    was born in 1988. He received the M.S. and Ph.D. degrees in electronic engineering from University of University of Electronic Science and Technology of China in 2011 and 2018. She joined the Institute of Electronic Engineering (IEE), China Academy of Engineering Physics (CAEP), Mianyang, China in 2019. The focus of her research is on submillimeter-wave and terahertz solid state circuits, highfrequency semiconductor devices, and low noise superheterodyne receivers for terahertz frequencies. (Email: liuge@mtrc.ac.cn)

    was born in 1986. He received the B.E. and M.S. degree in electronic information science and technology in 2008 and the M.S. degree in radio physics in 2011 from Sichuan University of China. She is a Ph.D. candidate of China Academy of Engineering Physics (CAEP). Her current research involves Terahertz communication system, high speed wireless communication, and digital pre-distortion algorithm. (Email: liujuan@mtrc.ac.cn)

    was born in 1986. He received the M.S and Ph.D. degrees from Tsinghua University in 2007 and 2012. He worked as a research assistant from June 2009 to December 2009 in European Organization for Nuclear Research (CERN). He joined the IEE, CAEP in 2012. His current research involves algorithm and implementation of high speed demodulation and terahertz wireless local area network (WLAN). (Email: linchangxing@mtrc.ac.cn)

    (corresponding author) received the B.S. degree in National University of Defense Technology in 1986, the M.S. degree in Graduate School of China Academy of Engineering Physics in 1989, and the Ph.D. degree in Beijing Institute of Technology in 2001. His current research involves micro-electromechanical systems, terahertz technology, and inertial navigation technology. (Email: suwei_caep@163.com)

  • Received Date: 2021-11-20
  • Accepted Date: 2022-01-25
  • Available Online: 2022-02-18
  • Publish Date: 2022-05-05
  • In this paper, A 220 GHz orthogonal modulator based on two symmetrical subharmonic mixers is designed, analyzed and measured, where the mixers are implemented basde on antiparallel Schottky diodes. The orthogonal modulator consists of a 90° phase shifted 220 GHz 3 dB coupler, two sub-harmonically pumped mixers and an in-phase 110 GHz 3 dB power divider. The IF output signals are in-phase (I) branch and quadrature (Q) branch operating from DC±3.5GHz. In the back to back experimentaltests, it is shown that the conversion loss of the two 220 GHz I/Q mixers is less than 30 dB when the IF operating frequency is DC−3.5 GHz, IF input power is −10 dBm and the LO power is around 6 mW. Based on floating-point simulation, the amplitude and phase imbalance of the I/Q mixer are less than 0.2 dB and 2 degree respectively. When the 220 GHz modulator and demodulator are set in a back to back configuration, a signal-to-noise ratio of 21 dB can be obtained using the 16QAM modulation type.
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