Yun Liu
Associate Professor Supervisor of Master's Candidates
Gender:Male
Alma Mater:东南大学
Education Level:东南大学
Degree:Doctoral Degree in Engineering
School/Department:College of Electronic and Information Engineering
Discipline:Electromagnetic Fields and Microwave Technology
Business Address:电子信息工程学院522室
Contact Information:13951873509
E-Mail:
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Affiliation of Author(s):电子信息工程学院
Journal:IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
Key Words:Broad dual-band parallel-line coupler (BDPC) dual-band parallel-line coupler (DBPC) dual-band quarter-wave coupled line (DQCL) symmetric stepped-impedance coupled line (SSICL)
Abstract:In this paper, a symmetric stepped-impedance coupled line (SSICL) is proposed to realize dual-band quarter-wave coupled line (DQCL), giving the same equivalent even and odd characteristic impedances at two different frequencies. The DQCL can be directly used to design dual-band parallel-line coupler (DBPC) with arbitrary coupling coefficient and large frequency ratio, resulting in even shorter total length when compared with traditional quarter-wave parallel-line coupler working at lower frequency f(1). In addition, broad DBPC (BDPC) is constructed by cascading multiple sections of SSICLs, as the SSICL is quite similar with quarter-wave coupled line in circuit. For demonstrating the design methods, in the first step, two edge-coupled 20-dB DBPCs and one broadside coupled 6-dB DBPC, working at 1/5.2, 1/7.5, and 1/5.2 GHz, respectively, are designed, fabricated and measured, exhibiting good features like large frequency ratio, high isolations, and compact dimensions. Then, for broadening bandwidths, three-section BDPC working at 1 GHz/5.2 GHz is designed and measured, resulting in working bandwidths larger than 1.2 GHz. These good features have proved the feasibility of the proposed circuits and the corresponding design methods.
ISSN No.:2156-3950
Translation or Not:no
Date of Publication:2018-01-01
Co-author:Jiang, Shuai,Zhu, Shuang,Tian, Yubo,Wu, Yongle
Correspondence Author:刘云
刘云，1978年1月生，博士，副教授。2000年和2004年分别在南京大学无线电物理专业获得学士和硕士学位，2009年于东南大学获得电磁场与微波技术专业博士学位。2016年9月至2017年9月在美国佛罗里达大学从事访问研究。长期从事微波毫米波器件、电路、系统的研究与开发，发表论文三十多篇，其中发表SCI索引论文二十多篇。申请专利十多项。
IEEE Member, IEEE MTT-8 sub-committee Member。2013年1月起同时在上市企业从事博士后研究工作。
为国内外多个著名期刊审稿，其中包括IEEE T-MTT,IEEE T-CAS，IEEE MWCL, PIER，JEMWA， Microelectronics Journal，CAES Journal，电子学报，电波科学学报等。
研究兴趣：
1,微波滤波器的综合、诊断、小型化；电可调微波滤波器；多模介质腔体滤波器；多频带滤波器。
2，多频微波功分器、耦合器、电桥、阻抗匹配网络。
3，微波射频收发组件,可重构收发组件。
4,天线技术
研究兴趣：
微波用于生命体征探测。（Vital sign detection）
主要论文：
[1]Liu, Yun. "Synthesis Techniques on Multiband Impedance Matching Networks for Frequency-Dependent Complex Loads." IEEE Transactions on Microwave Theory and Techniques Vol.66, No. 10, pp.4507-4519, Oct, 2018. (SCI)
[2]Yun Liu, Shuai Jiang, Shuang Zhu, Yubo Tian, Yongle Wu, Large Frequency-ratio Dual-band and Broad Dual-band Parallel-Line Couplers, IEEE Transactions on Components, Packaging and Manufacturing Technology, vol. 8, no. 1, pp. 121-131, Jan, 2018. (SCI)
[3]Yun Liu, Yongjiu Zhao, Shaobin Liu, Yonggang Zhou and Yao Chen,"Multi-frequency Impedance Transformers for Frequency-dependent Complex Loads", IEEE Trans. Microwave Theory and Technology, vol.61,no.9, pp:3225-3235,2013.（SCI）
[4]Jiang S, Liu Y, Chen Y, et al. Synthesis of Multi-band Bandpass Filters Using Semi-hidden Multi-mode Coupling Elements[J]. Ieice Electronics Express, 2017, 14(4).
[5]Xiyang Miao, Yun Liu*,Cheng Wan, A novel dual-band power divider using symmetric stepped- impedance inverters. IEICE Electronics Express,Vol.12,No.22,pp:1-8,Dec,2015.
[6]Yun Liu, Yubo Tian, Yao Chen and Chenwei Cui, Synthesis of lumped dual-frequency impedance transformers for complex loads using inverters, Microelectronics Journal, vol.46,pp:674-678, 2015. (SCI)
[7]Liu Y, Chen Y, Miao X, et al. Synthesis method of lumped dual–band filters with controllable bandwidths[J]. International Journal of RF and Microwave Computer‐Aided Engineering, 2015, 25(1): 75-80. （SCI）
[8]Cui C, Liu Y. Quad-band bandpass filter design by embedding dual-band bandpass filter with dual-mode notch elements[J]. Electronics Letters, 2014, 50(23): 1719-1720.（SCI）
[9]Yun Liu, Ralph Levy and Yao Chen, “Optimal Dual-band Impedance Transformers with Wide Bandwidths for Frequency Dependent Complex Loads”， 2013 IEEE/MTT-S International Microwave Symposium, Seattle,USA.
[10] Y. Liu, Y.J. Zhao, Y.G. Zhou, “Lumped dual-frequency impedance transformers for frequency-dependent complex loads”, Progress in Electromagnetics Research, Vol. 126, 121-138, 2012.(SCI)
[11] Yun Liu, Yongjiu Zhao, Mengmeng Cui and Hongfu Meng, “A novel tri-band filter realization via band-splitting technique”, IEICE Electron. Express, Vol. 9, No. 7, pp.718-723, (2012) .(SCI)
[12] Y. Liu, Y. Chen, Y.J Zhao, “Lumped Triple-frequency Impedance Transformers”, IET Electronics Letters.,Vol.48,No.19,2012.（SCI）
[13] Y. Liu, Y.J. Zhao, Y.G. Zhou, Z.Y. Niu, “Integrated dual-band BPF and single-band BSF for tri-band filter design”, Journal of Electromagnetic Waves and Applications, volume 25, no. 17/18, page 2420-2428, 2011.(SCI)
[14] Y. Liu, W.B. Dou and Y.J. Zhao, “A tri-band bandpass filter realized using tri-mode T-shape branches”, Progress in Electromagnetic Research, Vol 105, pp.425-444,2010.(SCI)
[15] Yun Liu, Wenbin Dou, “A dual-band filter realized by alternately connecting the main transmission-line with shunt stubs and shunt serial resonators”, IEEE Microw. Wireless Compon. Lett., vol. 19, no. 5, pp296-298, May. 2009.(SCI)
[16] Yun Liu, Wenbin Dou, “Miniature dual-band filters using integrated bandpass and bandstop filters for wide bandwidths”, IEICE Electronics Express, vol.6, no.10, 618-622, May, 2009. (SCI)
[17] Y. Liu, W.b. Dou, “Mutually-tapped coupling between combline resonator pairs for ultra-wideband (UWB) filter realization”, Journal of Electromagnetic Waves and Applications, vol.23, no.8/9, pp1165-1172, Aug, 2009.(SCI)
[18] 刘云，赵永久，“高端锐截止的短截线超宽带滤波器”,微波学报，2011， 27(4):pp42-44。
[19] Yun Liu, Yongjiu Zhao, Wenbin Dou and Bing Liu “A suspended stripline dual-band filter using interdigital-coupled resonator pairs”, China-Japan Joint Microwave Conference, 2011, Hangzhou.（EI）
[20] Yun Liu, Li Yu, Wenbin Dou, “A novel tuning structure for microwave bandstop filter”, IEEE MTTS International Microwave Symposium, 2006. San Francisco, USA. (EI)
[21] Liu Yun, Qian Jian,Tian Yubo. “Succinct formulas for decomposition of complex refraction angle”, IEEE APS International Symposium, 2003, Ohio, USA. (EI)
译著章节：
《通信系统微波滤波器——基础、设计与应用》，电子工业出版社，2012.第3,4章。 原作者：（英）Richard J. Cameron（理查德 J. 卡梅伦） （加） Chandra M. Kudsia（钱德拉 M. 库德赛） （加） Raafat R. Mansour（拉费特 曼索）
作为项目主持人承担了国家自然科学基金/江苏省自然科学基金等科研项目。
已毕业10名硕士生。现指导7名硕士生，联合指导1名外籍博士生。毕业研究生去向为中电55所、8511等研究所或大型企业从事科研和开发。2011级研究生陈瑶获国家奖学金。2013级研究生缪细洋获得研究生特等奖学金。2012级研究生崔晨炜获得学校专利发明奖。崔晨炜、缪细洋、蒋帅分别以第一作者在SCI期刊发表论文。
要求：1，积极主动的学习和工作态度，较高的研究热情和兴趣，易于沟通；2，愿意从事创新性探索性研究工作或愿意从事面向实际工业需要的技术研究。本人招生不歧视非211院校毕业学生。每年拟招收2-3个研究生。
