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    Dr. Juseop Lee - Assistant Professor, Korea University - juseop@purdue.edu, juseoplee@gmail.com

    Education

    B.Eng. in Radio Science and Engineering- Korea University, 1997
    M.Eng. in Radio Science and Engineering- Korea University, 1999
    Ph.D. in Electrical Engineering- University of Michigan, 2009

    Current Research Topics

    • Miniaturized tunable bandpass and bandstop evanescent-mode resonator filters with piezoelectric actuators
    • Reconfigurable-order microwave filter design 
    • Switchable filter with bandpass and bandstop responses
    • Switchable inter-resonator coupling structure for positive and negative coupling coefficients

    Past Research Topics
    •  Radar circuit design for a helicopter landing system
    •  PLL (Phase-Locked Loop) circuit design for a high-speed FMCW (Frequency-Modulated Continuous-Wave) radar
    •  Multiple-passband microwave resonator filters
    •  Microstrip-line tunable filters with a constant frequency response
    •  RF equipment design for Ku- and Ka-band communications satellites: Dual-mode channel filters, group-delay equalizers, input demultiplexers with a circulator-chain structure, output multiplexers with a manifold structure, lowpass filters, and test couplers
    •  Analysis on the high-power capability (multipaction breakdown) of waveguide components for satellite applications
    Awards and Honors

    •  Undergraduate Highest Honor Award from Korea University (1993)
    •  Undergraduate Fellowship from Korea University (1993~1996)
    •  Graduate Fellowship from LG Information and Communications (now LG Electronics) (1997~1998)
    •  Graduate Fellowship from Korea Science and Engineering Foundation (KOSEF) (2005~2007)
    •  The Rackham Predoctoral Fellowship from Rackham Graduate School, University of Michigan (2008)
    •  Graduate Fellowship from IEEE Microwave Theory and Techniques Society (MTT-S) (2008)
    •  Listed in Marquis Who’s Who in America (2009, 2010)

    Publications

    Journal Articles

    [1] Juseop Lee and Young-Sik Kim "A new method of accurately determining resonant frequencies of cylindrical and ring dielectric resonators" IEEE Trans. on Microwave Theory and Tech., vol. 47, no. 6, pp. 706-708, Jun. 1999.

    [2] Juseop Lee, Man Seok Uhm, In-Bok Yom, and Seong-Pal Lee "Coupling matrix of a 10th order dual-mode asymmetric canonical filter" Microwave and Optical Technology Letters, vol. 38, no. 1, pp. 64-68, Jul. 5, 2003.

    [3] Juseop Lee, Man Seok Uhm, In-Bok Yom, and Seong-Pal Lee "An accurate tuning method for dual-mode cavity filters" Microwave and Optical Technology Letters, vol. 38, no. 2, pp. 123-125, Jul. 25, 2003.
    [4] Juseop Lee, Man Seok Uhm, and In-Bok Yom  "A dual-passband filter of canonical structure for satellite applications"  IEEE Microwave and Wireless Component Letters, vol. 14, no. 6, pp. 271-273, Jun. 2004.
    [5] Juseop Lee, Man Seok Uhm, Jong Heung Park "Synthesis of a self-equalized dual-passband filter"
    IEEE Microwave and Wireless Components Letters, vol. 15, no. 4, pp. 256-258, Apr. 2005.
    [6] Chang-Soo Ahn, Juseop Lee, and Young-Sik Kim
    "Design flexibility of an open-loop resonator filter using similarity transformation of coupling matrix" IEEE Microwave and Wireless Components Letters, vol. 15, no. 4, pp. 262-264, Apr. 2005.
    [7] Chang-Soo Ahn, Juseop Lee, and Young-Sik Kim "A dual-passband microstrip open-loop resonator filter" Microwave and Optical Technology Letters, vol. 46, no. 3, pp. 241-243, Aug. 5, 2005.
    [8] Juseop Lee, Man Seok Uhm, In-Bok Yom, and Jeong Phill Kim "A dual-mode waveguide pseudo-elliptic filter with zero-shifting properties" Microwave and Optical Technology Letters, vol. 47, no. 4, pp. 357-359, Nov. 20, 2005.
    [9] Man Seok Uhm, Juseop Lee, In-Bok Yom, and Jeong Phill Kim “General coupling matrix synthesis method for microwave resonator filters with arbitrary topology” ETRI Journal, vol. 28, no. 2, pp. 223-226, Apr. 2006.
    [10] Man Seok Uhm, In-Bok Yom, Juseop Lee, and Jeong Phill Kim "A dual-passband waveguide filter with canonical structure for Ka band satellite applications" Microwave Journal, vol. 49, no. 7, pp. 90-97, Jul. 2006.
    [11] Juseop Lee and Kamal Sarabandi "A miniaturized conductor-backed slot-line resonator filter with two transmission zeros" IEEE Microwave and Wireless Components Letters, vol. 16, no. 12, pp. 660-662, Dec. 2006.
    [12] Juseop Lee and Kamal Sarabandi "A synthesis method for dual-passband microwave filters" IEEE Trans. on Microwave Theory and Tech., vol. 55, no. 6, pp. 1163-1170, Jun. 2007.
    [13] Juseop Lee and Kamal Sarabandi "Design of triple-passband microwave filters using frequency transformations" IEEE Trans. on Microwave Theory and Tech., vol. 56, no. 1, pp. 187-193, Jan. 2008.
    [14] Juseop Lee and Kamal Sarabandi "An analytic design method for microstrip tunable filters" IEEE Trans. on Microwave Theory and Tech., vol. 56, no. 7, pp. 1699-1706, Jul. 2008.
    [15] Juseop Lee and Kamal Sarabandi "Synthesizing microwave resonator filters” IEEE Microwave Magazine, vol. 10, no. 1, pp. 57-65, Feb. 2009.
    [16] Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, and William. J. Chappell, "A Tunable Bandpass-to-Bandstop Reconfigurable Filter with Independent Bandwidths and Tunable Response Shape," IEEE Trans. Microwave Theory and Techniques, vol. 58, no. 12, pp. 3770-3779, Dec. 2010.
    [17] Juseop Lee, Eric J. Naglich, and William J. Chappell, "Frequency Response Control in Frequency-Tunable Bandstop Filters," IEEE Microwave and Wireless Components Letters, vol 20. no. 12, pp. 669-671, Dec. 2010.
    [18] Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, and William J. Chappell, "Bandpass-Bandstop Filter Cascade Performance Over Wide Frequency Tuning Ranges," IEEE Trans. Microwave Theory and Techniques, vol. 58, no. 12, pp. 3945-3953, Dec. 2010.
    [19] J. Lee, E. J. Naglich, H. H. Sigmarsson, D. Peroulis, and W. J. Chappell, "Tunable Inter-Resonator Coupling Structure with Positive and Negative Values and Its Application to the Field-Programmable Filter Arrary (FPFA)," IEEE Trans. Microwave Theory and Techniques, vol. 59, no. 12, pp. 3389 - 3400, Dec. 2011.
    [20] E. J. Naglich, J. Lee, D. Peroulis, and W. J. Chappell, "Extended Passband Bandstop Filter Cascade with Continuous 0.85 to 6.6 GHz Coverage," IEEE Trans. Microwave Theory and Techniques, vol. 60, no. 1, pp. 21-30, Jan. 2012.
    [21] E. J. Naglich, J. Lee, D. Peroulis, and W. J. Chappell, "Switchless Tunable Bandstop-To-All-Pass
    Reconfigurable Filter," IEEE Trans. Microwave Theory and Techniques, accepted for publication.
    [22] J. Lee, E. J. Naglich, H. H. Sigmarsson, D. Peroulis, and W. J. Chappell, "New Bandstop Filter Circuit Topology and its Application to Design of a Bandstop-to-Bandpass Switchable Filter," IEEE Trans. Microwave Theory and Techniques, vol. 61, no. 3, pp. 1114-1123, March 2013.
    [23] E. J. Naglich, J. Lee, H. H. Sigmarsson, D. Peroulis, and W. J. Chappell, "Intersecting Parallel Plate Waveguide Loaded Cavities for Dual-Mode and Dual-Band Filters," IEEE Trans. Microwave Theory and Techniques, accepted for publication.

     

    Conference Papers

    [1] Juseop Lee, Sang-Min Han, and Young-Sik Kim "Resonant frequency of dielectric resonator," IEEE Radio and Wireless Conference, pp. 273-276, Colorado Springs, CO, Aug. 1998.
    [2] Juseop Lee, Sang-Ho Lim, Sun-Ha Lee, and Young-Sik Kim "Q-factors of a ring dielectric resonator in an MIC structure" IEEE Radio and Wireless Conference, pp. 195-198, Denver, CO, Aug. 1999.
    [3] Juseop Lee, Sungtek Kahng, Man Seok Uhm, In-Bok Yom, and Seong-Pal Lee "Externally equalized dual-mode narrow-band filters for Ku & Ka band satellite application" Topical Symposium on Millimeter Waves 2002, pp. 99-102, Yokosuka, Japan, Feb. 2002.
    [4] Juseop Lee, Man Seok Uhm, Sungtek Kahng, In-Bok Yom, and Seong-Pal Lee "A tuning method using a dummy cavity for dual-mode cavity filters" IEEE Radio and Wireless Conference, pp. 67-70, Boston, MA, Aug. 2002.
    [5] Man Seok Uhm, Juseop Lee, Duck-Ki Baek, In-Bok Yom, and Seong-Pal Lee "Ka band waveguide diplexer using E-plane T-junction with inductive iris" Asia-Pacific Microwave Conference, pp. 508-511, Kyoto, Japan, Nov. 2002.
    [6] Juseop Lee, Man Seok Uhm, In-Bok Yom, and Seong Pal Lee "Dielectric waveguide approach for analysis on hybrid mode resonant frequency of a ring DR loaded cavity" IEEE AP-S Int. Symposium on Antennas and Propagation, vol. 2, pp. 1197-1200, Columbus, OH, June 2003.
    [7] Juseop Lee, Man Seok Uhm, In-Bok Yom, Seong-Pal Lee, and Chun Kwon Choi "Simultaneous reduction of amplitude and group-delay variation of input demultiplexer for Ku band satellite transponder" IEEE Vehicular Technology Conference (VTC 2003-Fall), pp. 2669-2672, Orlando, FL, Oct. 2003.
    [8] Junho Choi, Juseop Lee, and Young-Sik Kim "A simple method for computing a coupling coefficient between ring DRs in an MIC structure" Asia-Pacific Microwave Conference (APMC 2003), vol. 3, paper no. WEP-75, Seoul, Korea, Nov. 2003.
    [9] Man Seok Uhm, Juseop Lee, So Hyeun Yun, Youn Sub Noh, Jong Heung Park "A study on the engineering verification of RF passive equipment for Communication, Ocean and Meteorological Satellite (COMS)" Joint Conference on Satellite Communications (JC-SAT 2004), pp. 79-86, Seoul, Korea, Oct. 2004.
    [10] Juseop Lee, Man Seok Uhm, and Jong Heung Park "Synthesis of a dual-passband elliptic filter with equalized group delay" 2005 IEEE/ACES Int. Conference on Wireless Communications and Applied Computational Electromagnetics,pp. 783-786, Honolulu, HI, Apr. 2005.
    [11] Man Seok Uhm, Juseop Lee, Jong Heung Park, and Jeong Phill Kim "An efficient optimization design of a manifold multiplexer using an accurate equivalent circuit model of coupling irises of channel filters" IEEE MTT-S Int. Microwave Symposium, pp. 1263-1266, Long Beach, CA, Jun. 2005.
    [12] Chang Soo Kwak, Juseop Lee, and In-Bok Yom "Thermal design and analysis of output multiplexer for Ka-band satellite transponder" European Microwave Conference (EuMC), pp. 1231-1234, Paris, France, Oct. 2005.
    [13] Mustafa Z. Rangwala, Juseop Lee, and Kamal Sarabandi "Design of a FMCW millimeter-wave radar for helicopter landing system" Int. Geoscience and Remote Sensing Symposium, Barcelona, Spain, Jul. 2007.
    [14] Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, and William J. Chappell "Tunable, substrate integrated, high Q filter cascade for high isolation"IEEE MTT-S Int. Microwave Symposium, Anaheim, CA, May 2010, pp. 1468-1471.
    [15] H. H. Sigmarsson, J. Lee, D. Peroulis, and W. J. Chappell, “Reconfigurable-Order Bandpass Filter for Frequency Agile Systems,” IEEE MTT-S International Microwave Symposium Digest, May 2010, pp. 1756-1759.
    [16] H. H. Sigmarsson, E. Binkerd, J. Maas, J. Lee, D. Peroulis, and W. J. Chappell, “Practical Implementation of Frequency Monitoring for Widely Tunable Bandpass Filters,” Proceedings of International Symposium on Microelectronics, International Microelectronics and Packaging Society (IMAPS), Raleigh, USA, 2010, pp. 874-880.
    [17] Adib Y. Nashashibi, Juseop Lee, and Kamal Sarabandi, "Compact FMCW design for short range millimeter-wave radar imaging applications," IEEE Radar Conference, pp. 885-888, Kansas City, MO, May 2011.
    [18] Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, and William J. Chappell, "High-Q Tunable Bandstop Filters with Adaptable Bandwidth and Pole Allocation," IEEE MTT-S Int. Microwave Symp. Digest , Baltimore, MD, June 2011, to be presented.
    [19] Juseop Lee, Eric J. Naglich, Hjalti H. Sigmarsson, Dimitrios Peroulis, and William J. Chappell, "Frequency-Agile Field-Programmable Filter Array (FPFA) with Multiple Functionalities," IEEE MTT-S Int. Microwave Symp. Digest , Baltimore, MD, June 2011, to be presented.
     

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