Publications

Journal Papers

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

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

4.   Juseop Lee, Man Seok Uhm, and In-Bok Yom, 'Duual-passband filter of canonical structure for satellite applications," IEEE Microwave and Wireless Components Letters, vol. 14, no. 6, pp. 271-273, June 2004.

5.   Juseop Lee, Man Seok Uhm, and 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 microstip open-loop resonator filter," Microwave and Optical Technology Letters, vol. 46, no. 3, pp. 241-243, Aug. 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. 2005.

9.   Man Seok Uhm, Juseop Lee, In-Bok Yom, and Jeong Phill Kim, "An efficient multiplaction analysis of an output multiplexer for satellite applications," Journal of the Korea Electromagnetic Engieering Society, vol. 5, no. 4, pp. 176-182, Dec. 2005.

10. 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.

11. 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, July 2006.

12. Juseop Lee and Kamal Sarabandi, "A miniaturized conductor-backed slot-line resonator filter with two transmission zeros," IEEE Microwave and Wireless Component Letters, vol. 16, no. 12, pp. 660-662, Dec. 2006.

13. 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, June 2007.

14. 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.

15. 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, July 2008.

16. Juseop Lee and Kamal Sarabandi, "Synthesizing microwave resonator filters," IEEE Microave Magazine., vol. 10, no. 1, pp. 57-65, Feb. 2009.

17. 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. on Microwave Theory and Tech., vol. 58, no. 12, pp. 3770-3779, Dec. 2010.

18. Juseop Lee, Eric J. Naglich, and William J. Chappell, "Frequency response control in frequency-tunable bandstop filters," IEEE Microwave and Wireless Component Letters, vol. 20, no. 12, pp. 669-671, Dec. 2010.

19. Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, and William J. Chappell, "Bandpass-bandstop filter cascade performance over wide frequency tuning ranges," IEEE Trans. on Microwave Theory and Tech., vol. 58, no. 12, pp. 3945-3953, Dec. 2010. 

20. Juseop Lee, Eric J. Naglich, Hjalti H. Sigmarsson, Dimitrios Peroulis, and William J. Chappell, "Tunable inter-resonator coupling structure with positive and negative values and its application to the field-programmable filter array(FPFA)," IEEE Trans. on Microwave Theory and Tech., vol. 59, no. 12, pp. 3389-3400, Dec. 2011. 

21. Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, and William J. Chappell, "Extended passband bandstop filter cascade with continuous 0.85 to 6.6 GHz coverage," IEEE Trans. on Microwave Theory and Tech., vol. 60, no. 1, pp. 21-30, Jan. 2012.

22. Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, and William J. Chappell, "Switchless tunable bandstop-to-all-pass reconfigurable filter," IEEE Trans. on Microwave Theory and Tech., vol. 60, no. 5, pp. 1258-1265, May 2012.

23. Juseop Lee, Tsung-Chieh Lee, and William J. Chappell, "Lumped element realization of absorptive bandstop filter with anomalously high spectral isolation," IEEE Trans. on Microwave Theory and Tech., vol. 60, no. 8, pp. 2424-2430, Aug. 2012. 

24. Kangho Lee, Tae-Hak Lee, Young-Sik Kim, and Juseop Lee, "New negative coupling structure for substrate-integrated cavity resonators and its application to design of an elliptic response filter," Progress in Electromagnetics Research, vol. 137, pp. 117-127, 2013.

25. Juseop Lee, Eric J. Naglich, Hjalti H. Sigmarsson, Dimitrios Peroulis, and William J. Chappell, "New bandstop filter circuit topology and its application to design of a bandstop-to-bandpass switchable filter," IEEE Trans. on Microwave Theory and Tech., vol. 61, no. 3, pp. 1114-1123, Mar. 2013.

26. Eric J. Naglich, Juseop Lee, Hjalti H. Sigmarsson, Dimitrios Peroulis, and Wilima J. Chappell, "Intersecting parallel plate waveguide loaded cavities for dual-mode and dual-band filters," IEEE Trans. on Microwave Theory and Tech., vol. 61. no. 5, pp. 1829-1838, May 2013.

27. Byungguk Kim, Jangjoon Lee, Juseop Lee, Byunghoo Jung, and William J. Chappell, "RF CMOS integrated on-chip tunable absorptive bandstop filter using Q-tunable resonators," IEEE Trans. on Electron Devices, vol. 60, no. 5, pp. 1730-1737, May 2013.

28. T. Lee, C.-S. Ahn, Y.-S. Kim, and Juseop Lee, "Extension of bandstop filter topology with inter-resonator coupling structures to higher-order filters," IEEE Microwave and Wireless Components Letters, vol. 23, no. 8, pp. 403-405, Aug. 2013.

29. K. Chen, Juseop Lee, W. J. Chappell, and D. Peroulis, "Co-design of highly efficient power amplifier and high-Q output bandpass filter," IEEE Trans. on Microwave Theory and Tech., vol. 61, no. 11, pp. 3940-3950, Nov. 2013.

30. Juseop Lee, Y.-S. Lim, W.-J. Yang, and S.-O. Lim, "Wireless power transfer system adaptive to change in coil separation," IEEE Trans. on Antennas and Propagation, vol. 62, no. 2, pp. 889-898, Feb. 2014.

31. I. Shim, T.-H. Lee, Juseop Lee, and Y.-S. Kim, "A novel resonant ground structure based on a cavity-backed DGS", IEEE Microwave and Wireless Components Letters, vol. 24, no. 5, pp. 321-323, May 2014.

32. Juseop Lee, Y.-S. Lim, H. Ahn,  J.-D. Yu, and S.-O. Lim, "Impedance-matched wireless power transfer systems using an arbitrary number of coils flexible coil positioning," IEEE Antennas and Wireless Propagation Letters, vol. 13, pp. 1207-1210, 2014.

33. K. Lee, T.-H. Lee, C.-S. Ahn, Y.-S. Kim, and Juseop Lee, "Reconfigurable dual-stopband filters with reduced number of couplings between a transmission line and resonators," IEEE Microwave and Wireless Components Letters, vol. 25, no. 2, pp. 106-108, Feb. 2015. 

34. C.-S. Ahn, S.-J. Kim, Y.-S. Kim, and Juseop Lee, "Markov chain of active tracking in a radar system and its application to quantitative analysis on track formation range," Journal of Electrical Engineering and Technology, vol. 10, no. 3, pp. 1275-1283, May 2015.

35. B. Lee, T.-H. Lee, K. Lee, M. S. Uhm, and Juseop Lee, "K-band substrate-integrated waveguide resonator filter with suppressed higher-order mode," IEEE Microwave and Wireless Components Letters, vol. 26, no. 6, pp. 367-369, June 2015.

36. K. Lee, T.-H. Lee, G. C. Park, H. H. Sigmarsson, and Juseop Lee, "Frequency-tunable bandstop-bandpass dual-function microwave filter," IEICE Electronics Express, vol. 12, no. 11, pp. 20150313, June 2015.

37. T.-C. Lee, Juseop Lee, and D. Peroulis, "Dynamic bandpass filter shape and interference cancellation control utilizing bandpass-bandstop filter cascade," IEEE Trans. on Microwave Theory and Tech., vol. 63, no. 8. pp. 2526-2539, Aug. 2015.

38. B. Lee, S. Nam, B. Koh, C. Kwak, and Juseop Lee, "K-band frequency tunable substrate-integrated waveguide resonator filter with enhanced stopband attenuation," IEEE Trans. on Microwave Theory and Tech., vol. 63, no. 11, pp. 3632-3640, Nov. 2015.. 

39. Juseop Lee, B. Kim, K. Lee, W. J. Chappell, "Bandwidth-enhanced lumped-element absorptive bandstop filter topology and its application to LTCC bandstop filter design," International Journal of Microwave and Wireless Technologies, vol. 7, issue 6, pp. 691-698, Dec. 2015. 

40. S. Saeedi, Juseop Lee, and H. H. Sigmarsson, "Novel coupling matrix synthesis for single layer substrate-integrated evanescent-mode cavity tunable bandstop filter design," IEEE Trans. on Microwave Theory and Tech., vol. 63, no. 12, pp. 3929-3937, Dec. 2015.

41. T.-H. Lee, K. Lee, G. C. Park, Y-S. Kim and Juseop Lee, "Bandstop Filter (BSF) topology with variable attenuation," IEEE Trans. on Microwave Theory and Tech., vol. 64, no. 2, pp. 467-474, Feb. 2016.

42. S. Saeedi, Juseop Lee, and H. H. Sigmarsson, "Tunable, high-Q, substrate-integrated, evanescent-mode cavity bandpass-bandstop filter cascade," IEEE Microwave and Wireless Components Letters, vol. 26, no. 4, pp. 240-242, April 2016.

43. Chang-Soo Ahn, Seon-Joo Kim, Young-Sik Kim, and Juseop Lee, "Accurate characterization of T/R modules with consideration of amplitude/phase cross effect in AESA antenna unit," ETRI Journal, vol. 38, no. 3, pp. 417-424, June 2016.

44. Shahrokh Saeedi, Juseop Lee, and Hjalti H. Sigmarsson, "Prediction of power handling in tunable, high-Q, substrate-integrated, evanescent-mode cavity bandpass filters," IET Electronics Letters, vol. 52, no. 10, pp. 846-848, May 2016.

45. Shahrokh Saeedi, Juseop Lee, and Hjalti H. Sigmarsson, "A new property of maximally-flat lowpass filter prototype coefficients with application in dissipative loss calculation," Progress in Electromagnetics Research C, vol. 63, pp. 1-11, Mar. 2016.

46. Seunggoo Nam, Beyoungyoun Koh, Boyoung Lee, and Juseop Lee, "Low-cost high-performance frequency-tunable substrate-integrated waveguide filter structure and fabrication method," IEICE Electronics Express, vol. 13, No. 9, pp. 20160211, May 2016.

47. Beyoungyoun Koh, Boyoung Lee, Seunggoo Nam, Tae-Hak Lee, and Juseop Lee, "Integration of inter-resonator coupling structures with applications to filter systems with signal route selectivity," IEEE Trans. on Microwave Theory and Tech., vol. 64, no. 9, pp. 2790-2803, Sept. 2016.

48. Seunggoo Nam, Boyoung Lee, Beyoungyoun Koh, Changsoo Kwak, and Juseop Lee, "K-band fully reconfigurable pseudo-elliptic waveguide resonator filter with tunable positive and negative couplings," IEICE Trans. on Communications, vol. E99-B, no. 10, pp. 2136-2145, Oct. 2016.

49. Tae-Hak Lee, Byungguk Kim, Kangho Lee, William J. Chappell, and Juseop Lee, "Frequency-tunable low-Q lumped-element resonator bandstop filter with high attenuation," IEEE Trans. on Microwave Theory and Tech., vol. 64, no. 11, pp. 3549-3556, Nov. 2016.

50. Boyoung Lee, Seunggoo Nam, Tae-Hak Lee, Chang-Soo Ahn, and Juseop Lee, "Single filter structure with tunable operating frequency in non-contiguous bands," IEEE Trans. on Components, Packaging and Manufacturing Technology, vol. 7, no. 1, pp. 98-105, Jan. 2017. 

51. Boyoung Lee, Seunggoo Nam, Tae-Hak Lee, and Juseop Lee, "Third-order frequency-agile substrate-integrated waveguide filter with a pair of transmission zeros," IEEE Microwave and Wireless Components Letters, vol. 27, no. 6, pp. 566-568, June 2017.

52. Boyoung Lee, Beyoungyoun Koh, Seunggoo Nam, Tae-Hak Lee, and Juseop Lee, "Frequency-tunable filtering power divider with new topology," IEEE Trans. on Components, Packaging and Manufacturing Technology, vol. 7, no. 7, pp. 1151-1162, July 2017. 

53. Seunggoo Nam, Boyoung Lee, and Juseop Lee, "Theory for pseudo-Butterworth filter response and its application to bandwidth tuning," IEEE Trans. on Microwave Theory and Tech., vol. 65, no. 8, pp. 2847-2856, Aug. 2017.

54. Boyoung Lee, Seunggoo Nam, Beyoungyoun Koh, and Juseop Lee, "K-band substrate-integrated waveguide filter using TM21 mode with enhanced stopband attenuation," IEEE Microwave and Wireless Components Letters, vol. 27, no. 8, pp. 700-702, Aug. 2017.

55. Seunggoo Nam, Boyoung Lee, Beyoungyoun Koh, and Juseop Lee, "Reconfigurable bandpass filter with resonators in cul-de-sacs for producing notches," IEEE Trans. on Components, Packaging and Manufacturing Technology, vol. 7, no. 9, pp. 1531-1542, Sept. 2017.

56. Tae-hak Lee, Boyoung Lee, Seunggoo Nam, Young-Sik Kim, and Juseop Lee, "Frequency-tunable tri-function filter," IEEE Trans. on Microwave Theory and Tech., vol. 65, no. 11, pp. 4584-4592, Nov. 2017.

57. Boyoung Lee, Beyoungyoun Koh, Seunggoo Nam, Tae-Hak Lee, and Juseop Lee, "Band-switchable substrate-integrated waveguide resonator and filter," IEEE Trans. on Microwave Theory and Tech., vol. 66, no.1, pp. 147-156, Jan. 2018.

58. Seong-Wook Jeong and Juseop Lee, "Frequency- and bandwidth-tunable bandstop filter containing variable coupling between transmission line and resonator," IEEE Trans. on Microwave Theory and Tech., vol. 66, no. 2, pp. 943-953, Feb. 2018.

59. Boyoung Lee, Seunggoo Nam, Changsoo Kwak, and Juseop Lee, "New negative coupling structure for K-band substrate-integrated waveguide resonator filter with a pair of transmission zeros," IEEE Microwave and Wireless Components Letters, vol. 28. no. 2, pp. 135-137, Feb. 2018.

60. Seunggoo Nam, Boyoung Lee, Changsoo Kwak, and Juseop Lee, "A new class of K-band high-Q frequency-tunable circular cavity filter," IEEE Trans. on Microwave Theory and Tech., vol. 66, no. 3, pp. 1228-1237, Mar. 2018.

61. S. Saeedi, S. Atash Bahar, Juseop Lee, and H. Sigmarsson, "Control system for piezoelectric-actuator-based tunable evanescent-mode cavity microwave filters," IEEE Trans. on Components, Packaging and Manufacturing Technology, vol. 8. no. 11, pp. 1979-1989, Nov. 2018.

62. Boyoung Lee, Seunggoo Nam, Changsoo Kwak, and Juseop Lee, "Bandwidth tuning of resonator filter using reduced number of tunable coupling structures," IEEE Trans. on Microwave Theory and Tech., vol. 67, no. 4, pp. 1496-1503, Apr. 2019.

63. Gyuwon Lee, Boyoung Lee, Jang-Yong Jeong, and Juseop Lee, "Ka-band surface-mount cross-coupled SIW filter with multi-layered microstrip-to-GCPW transition," IEEE Access, vol. 7, pp. 66453-66462, May 2019.

64. Seong-Wook Jeong, Tae-Hak Lee, and Juseop Lee, "Frequency- and bandwidth-tunable absorptive bandpass filter," IEEE Trans. on Microwave Theory and Tech., vol. 67, no. 6, pp. 2172-2180, June 2019.

65. Boyoung Lee, Seunggoo Nam, and Juseop Lee, "Filtering power divider with reflectionless response and wide isolation at output ports," IEEE Trans. on Microwave Theory and Tech., vol. 67, no. 7, pp. 2684-2692, July 2019.

66. Seunggoo Nam, Boyoung Lee, Changsoo Kwak, and Juseop Lee, "Contactless tuning plunger and its application to K-band frequency-tunable cavity filter with a constant absolute bandwidth," IEEE Trans. on Microwave Theory and Tech., vol. 67, no. 7, pp. 2713-2719, July 2019.

67. Boyoung Lee, Seunggoo Nam, and Juseop Lee, "Optimization-free design equations for narrow-band equal-division filtering power divider with pre-specified filtering response and wideband isolation," IEEE Trans. on Circuits and Systems I:Regular Papers, vol. 66, no. 7, pp. 2496-2507, July 2019.

68. Tae-Hak Lee, Boyoung Lee, Young-Sik Kim, Ke Wu, and Juseop Lee, "Higher order lumped element lowpass and bandpass filters structures," IET Microwaves, Antennas & Propagation, vol. 13, issue 8, pp. 1166-1173, July 2019.

69. Boyoung Lee, Seunggoo Nam, Seong-Wook Jeong, and Juseop Lee, "Post-loaded Substrate-Integrated Waveguide Bandpass Filter with Wide Upper Stopband and Reduced Electric Field Intensity," IEEE Microwave and Wireless Components Letters, vol. 30, no. 4, pp. 371-374, Apr. 2020.

70. Jongheun Lee, Boyoung Lee, Seunggoo Nam, and Juseop Lee, "Rigorous design method for symmetric reflectionless filters with arbitrary prescribed transmission response," IEEE Trans. on Microwave Theory and Tech., vol. 68, no. 6, pp. 2300-2307, June 2020.

71. Jongheun Lee and Juseop Lee, "Distributed-element reflectionless bandstop filter with a broadband impedance matching," IEEE Microwave and Wireless Components Letters, vol. 30, no. 6, pp. 561-564, June 2020.

72. Sanggu Lee, Seunggoo Nam, and Juseop Lee, "Practical design and implementation method for asymmetric-response post-loaded substrate-integrated waveguide filters," IEEE Access, vol. 8, pp. 101528-101538, 2020.

73. Jongheun Lee and Juseop Lee, "Arbitrary-order distributed-element narrowband reflectionless bandstop filter with canonical transmission response and broadband matching," IEEE Trans. on Microwave Theory and Tech., vol. 68, no. 10, pp. 4381-4389, Oct. 2020.

74. Boyoung Lee, Gyuwon Lee, and Juseop Lee, "Topology and design formulas for four-way filtering power divider with wide isolation range," IEEE Access, vol. 9, pp. 18298-18306, Jan. 2021.

75. Jongheun Lee and Juseop Lee, "Generic and versatile reflectionless filter topology and its applications to distributed-element reflectionless bandpass filters," IEEE Trans. on Microwave Theory and Tech., vol. 69, no. 6, pp. 3058-3069, June 2021.

76. Gyuwon Lee, Jongheun Lee, Boyoung Lee, and Juseop Lee, "Rigorous design method for distributed-element bandpass filter with reflectionless response at two ports," Electronics Letters, vol. 53, no. 13, pp. 514-516, June 2021.

77. Juseop Lee, Jongheun Lee, and N. Scott Barker, "Rigorous design of input-reflectionless filter with Chebyshev response and exact approach to increase reflectionless range," IEEE Trans. on Microwave Theory and Tech., vol. 69, no. 10. pp. 4460-4475, Oct. 2021. 

78. Boyoung Lee, Gyuwon Lee, Seunggoo Nam, and Juseop Lee, "Negative interresonator coupling structure enclosed in waveguide resonator filter," IEEE Trans. on Microwave Theory and Tech., vol. 69, no. 11,  pp. 4658-4666, Nov. 2021. 

79. Seong-Wook Jeong, Gyuwon Lee, Jongheun Lee, and Juseop Lee, "Frequency-tunable absorptive bandpass filter using substrate-integrated waveguide structure," IEEE Trans. on Microwave Theory and Tech., vol. 69, no. 12, pp. 5351-5359, Dec. 2021. 

80. Jongheun Lee, and Juseop Lee, "Transmission-line absorptive bandstop filters with wide passband: synthesis and design," IEEE Trans. on Microwave Theory and Tech.,vol. 69, no. 12, pp. 5371-5380, Dec. 2021.

81. Boyoung Lee, Gyuwon Lee, Jongheun Lee, and Juseop Lee, "All-port-reflectionless narrowband filtering power divider topology with generic equations," IEEE Trans. on Circuits and Systems I:Regular Papers, vol. 69. no. 4, pp. 1417-1426, Apr. 2022. 

82. Jongheun Lee and Juseop Lee, "Implementation of distributed-element Foster section and its applications to bandpass filters," IEEE Microwave and Wireless Components Letters, vol. 32, no. 5, pp. 391-394, May 2022.

83. Jongheun Lee and Juseop Lee, "Transmission-line bandpass filter structures with infinite reflectionless range,"IEEE Trans. on Circuits and Systems I:Regular Papers, vol. 69, no. 6, pp. 2387-2398, June 2022.

84. Boyoung Lee, Gyuwon Lee, Jongheun Lee, Juseop Lee, "Resonator reuse approach for implementing narrowband bandpass-bandstop cascade based on mode orthogonality," IEEE Trans. on Circuits and Systems II: Express Briefs, vol. 70. no. 1, pp. 41-45, Jan. 2023.

85. Sanggu Lee, Sungjoon Yoon, and Juseop Lee, "Electroformed dual-mode waveguide filter with no tuning screws," IEEE Trans. on Components, Packaging, and Manufacturing Technology, vol. 13, no. 1, pp. 138-141, Jan. 2023.

86. Sanggu Lee and Juseop Lee, "Accurate synthesis of input-reflectionless dual-passband filter," IEEE Trans. on Microwave Theory and Tech., vol. 71, no. 3, pp. 1148-1158, Mar. 2023.

87. Boyoung Lee, Gyuwon Lee, and Juseop Lee, "Two-layered cross-coupled post-loaded SIW filter with microstrip ports," IEEE Trans. on Circuits and Systems II: Express Briefs, vol. 70, no. 4, pp. 1346-1350, Apr. 2023.

88. Jongheun Lee, Minhyup Song, and Juseop Lee, "Transmission-line schematic for harmonic-controlled bandpass filter," IEEE Access, vol. 11, pp. 53275-53289, May 2023 .

89. Jongheun Lee, and Juseop Lee, "Design methodology of transmission-line quadruplet filters supported by rigorous circuit transformation," IEEE Trans. on Microwave Theory and Tech., vol. 71, no. 6, pp. 2639-2651, June 2023. 

90. Seungjun Lee, Jongheun Lee, and Juseop Lee, "Synthesis of N-Foster-section filter with maximum 2N prescribed transmission zeros by heuristic-aided graph search," IEEE Trans. on Microwave Theory and Tech., vol. 71, no. 9, pp. 3979-3990, Sept. 2023.

91. M. Song, H. Choi, Y. Jung, T. Lee, G. Choi, Juseop Lee, and M. Song, "Multiband microwave photonic filters with tunability and programmability via optical frequency comb shaping," Journal of Lightwave Technology, vol. 41, no. 23, pp. 7215-7222, Dec. 2023. 

92. Jongheun Lee and Juseop Lee, "Formulation of transmission-line canonical cross-coupled filters based on two standard building blocks," IEEE Trans. on Microwave Theory and Tech., vol. 72, no. 2, pp. 1234-1253, Feb. 2024.

93. Sanggu Lee, Jongheun Lee, Duckki Baek, Pilyong Lee, and Juseop Lee, "Practical circuit-based design approach for waveguide lowpass filter with extremely steep skirt response," IEEE Access, vol. 12, pp. 35512-35520, Mar. 2024.

94. Jongheun Lee, Osman Ceylan, and Juseop Lee, "Reflectionless highpass filters for load-pull setups," IEEE Microwave Magazine, accepted for publication.

95. Hyungjong Choi, Minhyup Song, and Juseop Lee, "Novel Transmission-line circuit configuration of cross-coupled filter with negative coupling," IEEE Trans. on Microwave Theory and Tech., 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, 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. Symp. on Antennas and Propagation, 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, 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, paper no. WEP-75, Seoul, Korea, Nov. 2003.

9.    Man Seok Uhm, Juseop Lee, So Hyeun Yun, Youn Sub Noh, and 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," 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 iris of channel filters," IEEE MTT-S Int. Microwave Symp. pp. 1263-1266, Long Beach, CA, June 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, July 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 Symp., pp. 1468-1471, Anaheim, CA, 2010. (2nd-place in Student Paper Competition)

15.  Hjalti H. Sigmarsson, Juseop Lee, Dimitrios Peroulis, and William J. Chappell, "Reconfigurable-order bandpass filter for frequency agile systems," IEEE MTT-S Int. Microwave Symp., pp. 1756-1759, Anaheim, CA, 2010.

16.  Hjalti H. Sigmarsson, Evan Binkerd, Jeff Mass, Juseop Lee, Dimitrios Peroulis, and William J. Chappell, "Practical imiplementation of frequency monitoring for widely tunable bandpass filters," Proc. Int. Symposium on Microelectronics, Int. Microelectronics and Packaging Society (IMAPS), pp. 874-880, Raleigh, NC, Nov. 2010.

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., Baltimore, MD, June 2011.

19.  Juseop Lee, Eric J. Naglich, Hjalti H. Sigmarsson, Dimitrios Peroulis, and William J. Chappell, "Frequency-agile field-programmable filter arrary (FPFA) with multiple functionalities," IEEE MTT-S Int. Microwave Symp., Baltimore, MD, June 2011.

20.  Eric J. Naglich, Juseop Lee, Dimitrios Peroulis, and William J. Chappell, "Tunable bandstop filter with a 17-to-1 upper passband," IEEE MTT-S Int. Microwave Symp., Montreal, Quebec, Canada, June 2012.

21.  Trevor Snow, Juseop Lee, and William J. Chappell, "Tunable high quality-factor absorptive bandstop filter design," IEEE MTT-S Int. Microwave Symp., Montreal, Quebec, Canada, June 2012.

22. Hjalti H. Sigmarsson, Eric, J. Naglich, Juseop Lee, Dimitrios Peroulis, and William J. Chappell, "Tunable bandpass and bandstop filter cascade for dynamic pole allocation," IEEE Int. Symp. on Antennas and Propagation, Chicago, IL, July 8-13, 2012.

23. T.-H. Lee, K. Lee, C.-S. Ahn, Y.-S. Kim, and Juseop Lee, "Odd-order bandstop filter (BSF) with inter-resonator coupling structures," Progress in Electromagnetics Research Symposium (Abstracts), Stockholm, Sweden, Aug. 12-15, 2013.

24. K. Lee, T.-H. Lee, Y.-S. Kim, and Juseop Lee, "A lumped-element absorptive bandstop filter topology with perfect impedance matching," Progress in Electromagnetics Research Symposium (Abstracts), Stockholm, Sweden, Aug. 12-15, 2013.

25. T.-C. Lee, Juseop Lee, E. J. Naglich, and D. Peroulis, "Octave tunable lumped-element notch filter with resonator-Q-independent zero reflection coefficient," 2014 IEEE MTT-S Int. Microwave Symp., Tampa, FL, June 1-6, 2014.

26. S. Saeedi, Juseop Lee, and H. H. Sigmarsson, "Broadband implementation of tunable, substrate-integrated, evanescent-mode, cavity bandpass filter," 2014 European Microwave Week (EuMW), pp. 849-852, Rome, Italy, Oct. 6-9, 2014.

27. S. Saeedi, W. S. Wilson, T. R. Ashley, H. H Sigmarsson, and Juseop Lee, "Capacitive-based, closed-loop frequency control of substrate-integrated cavity tunable filters," Proceeding of Int. Symposium on Microelectronics, pp. 826-831, San Diego, CA., Oct. 13-16, 2014.

28. B. Koh, B. Lee, S. Nam, and Juseop Lee, "Positive-to-zero continuously tunable inter-resonator coupling structure for applications in filter array systems," 2015 IEEE MTT-S Int. Microwave Symp., Phoenix, AZ, May 17-22, 2015 .

29. S. Saeedi, Juseop Lee, and H. H. Sigmarsson, "Double conversion method for synthesis of inverse filters," 2015 IEEE MTT-S Int. Microwave Symp., Phoenix, AZ, May 17-22, 2015.

30. S.Nam, B. Lee, B. Koh, C. Kwak, and Juseop Lee, "K-band fully reconfigurable pseudo-elliptic bandpass filter with a negative coupling structure," 2015 Joint Conference on Satellite Communications (JC-SAT), IEICE Technical Report, pp. 7-12, Osaka, Japan, Oct. 7-8, 2015. (Best Paper Award)

31. Seunggoo Nam, Boyoung Lee, and Juseop Lee, "Reconfigurable bandpass filter topology using cul-de-sac resonators with adjustable notches," 2016 IEEE MTT-S Int. Microwave Symp., San Francisco, CA, May 22-27, 2016.

32. Tae-Hak Lee, Boyoung Lee, and Juseop Lee, "First-order reflectionless lumped-element lowpass filter (LPF) and bandpass filter (BPF) design," 2016 IEEE MTT-S Int. Microwave Symp., San Francisco, CA, May 22-27, 2016.

33. Seunggoo Nam, Boyoung Lee, and Juseop Lee, "Constant-absolute-bandwidth frequency-tunable half-mode SIW filter containing no tunable coupling structure," 2017 IEEE MTT-S Int. Microwave Symp., Honolulu, HI, June 4-9, 2017.

34. Gyuwon Lee, Boyoung Lee, and Juseop Lee, "Ka-band surface-mount dielectric resonator filter with an enhanced stopband performance," Progress in Electromagnetics Research Symposium (Abstracts), Singapore, Nov. 19-22, 2017.

 35. Seong-Wook Jeong, Tae-Hak Lee, and Jueop Lee, "Absorptive filter prototype and distributed-element absorptive bandpass filter," IEEE MTT-S Int. Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization, Reykjavik, Iceland, Aug. 8-10, 2018. 

36. Beyoungyoun Koh and Juseop Lee, "Reflectionless Butterworth and Chebyshev filters," European Microwave Conference in Central Europe, Prague, Czech Republic, May 13-15, 2019.

37. Seunggoo Nam, Boyoung Lee, and Juseop Lee, "Gap waveguide structure with three functionalities: all-stop, all-pass, and fully reconfigurable bandpass filtering," European Microwave Conference in Central Europe, Prague, Czech Republic, May 13-15, 2019.

38. Seunggoo Nam, Boyoung Lee, and Juseop Lee, "Frequency-tunable substrate-integrated waveguide filter using contactless rotatable flaps," 2019 IEEE MTT-S Int. Microwave Symp., Boston, MA, June 2-7, 2019.

39. Sanggu Lee, Seunggoo Nam, Boyoung Lee, and Juseop Lee, "Easy-to-fabricate embedded negative coupling structure for post-loaded dielectric resonator filter," European Microwave Conference, Paris, France, Oct. 1-3, 2019.

40. Jongheun Lee, Boyoung Lee, Seunggoo Nam, and Juseop Lee, "Topology and rigorous design method for reflectionless bandstop filter," European Microwave Conference, Paris, France, Oct. 1-3, 2019.

41. Seong-Wook Jeong and Juseop Lee, "Absorptive bandpass filter with a pair of transmission zeros," IEEE International NEWCAS conference, Montreal, Canada (online), June 16-19, 2020.

42. Jongheun Lee and Juseop Lee, "Distributed-element absorptive bandpass filter with a broadband impedance matching," IEEE MTT-S Int. Microwave Symposium, Los Angeles, CA (online), Aug. 4-6, 2020.

43. Boyoung Lee, Seunggoo Nam, and Juseop Lee, "New static external coupling structure for K-band frequency-tunable constant-bandwidth waveguide filter with wide tuning range," Int. Conference on Electronics, Information, and Communication (ICEIC), Jeju Island, South Korea, Jan. 31- Feb. 3, 2021.

44. Jongheun Lee and Juseop Lee, "Practical design method of distributed-element reflectionless bandstop filters," Int. Conference on Electronics, Information, and Communication (ICEIC), Jeju Island, South Korea, Jan. 31- Feb. 3, 2021.

45. Jongheun Lee and Juseop Lee "A new class of symmetric reflectionless filter topology and its applications to coupled-line bandpass filter design," IEEE MTT-S Int. Wireless Symposium, Nanjing, China, May 23-26. 

45. Juseop Lee, Han-Yu Tsao, Sanggu Lee, and N. Scott Barker, "Terahertz input-reflectionless waveguide filter," IEEE MTT-S Int. Microwave Symp., Atlanta, GA, June 20-25, 2021. 

46. Sanggu Lee, Jongheun Lee, and Juseop Lee, "Theoretical design of transmission-line reflectionless bandstop filter," IEEE MTT-S Int. Microwave Filter Workshop, Perugia, Italy, Nov. 17-19, 2021. 

47. Boyoung Lee, Gyuwon Lee, and Jueop Lee, "Post-loaded substrate-integrated waveguide dual-band filter with wide upper stopband," Asia-Pacific Microwave Conference, Yokohama, Japan, Nov. 29 - Dec. 02, 2022..

48. Jongheun Lee and Juseop Lee, "Direct conversion from two-port S-parameters to coupled-line impedances," Asia-Pacific Microwave Conference, Yokohama, Japan, Nov. 29 - Dec. 02, 2022.

49. Jongheun Lee, Seong-Wook Jeong, Boyoung Lee, Myeongshin Lee, and Juseop Lee, "Dual-mode waveguide cavity filters and diplexer with fractional bandwidths around 0.2%," Int. Conference on Electronics, Information, and Communication (ICEIC), Singapore, Feb. 05- 08, 2023.

50. Jongheun Lee, Juseop Lee, Seunggoo Nam, and Sehwan Choi, "Synthesizing input-reflectionless filters with transmission zeros: first Cauer, then Foster," IEEE MTT-S Int. Microwave Filter Workshop, Cocoa Beach, FL, Feb. 21-23, 2023. 

51. Seungjun Lee, Jongheun Lee, and Juseop Lee, "Rigorous approach to the coupling matrix synthesis problem based on geometric interpretation," IEEE MTT-S Int. Microwave Symp., Washington DC, accepted for presentation. 

Patents (U.S.)

1.   Changsoo Kwak, Manseok Uhm, Inbok Yom, Juseop Lee, and Sohyeun Yun, "Screwdriver-and-nutwrench-combined tuning tool for radio frequency filters," US Patent No. 7216566, May 15, 2007.

2.   Juseop Lee, Manseok Uhm, Inbok Yom, and Jongheung Park, "Realization method of self-equalized multiple passband filter," US Patent No. 7558814, Jul. 7, 2009.

3.   Manseok Uhm, Jusoep Lee, Sohyeun Yun, and Inbok Yom, "Filter coupled by the conductive plates with a curved surface," US Patent No. 7796000, Sep. 2010.

4.   W. J. Chappell, D. Peroulis, Juseop Lee, E. J. Naglich, and H. H. Sigmarsson, "Field Programmable Filter Array," US Patent No. 8665040, Mar. 4, 2014.

5. Juseop Lee and Jongheun Lee, "Frequency filter circuit," US Patent No. 11381214B2, July 5, 2022.

Patents (Korea)

1.    Juseop Lee, Manseok Uhm, Sungtek Kahng, Inbok Yom, and Seongpal Lee, "Tuning method using a dummy cavity filter," Korea Paten No. 476382, Mar. 3, 2005 

2.    Manseok Uhm, Juseop Lee, Jongheung Park, and Jeongpil Kim, "Corrugated cylindrical waveguide resonator and filter using that," Korea Patent No. 558882, Mar. 2, 2006.

3.    Juseop Lee, Manseok Uhm, Inbok Yom, Jongheung Park, and Seongpal Lee, "Method for multiple passband filter of canonical structure," Korea Patent No. 563491, Mar. 16, 2006.

4.    Jongheung Park and Juseop Lee, "Temperature compensation apparatus and method for manifolder of high power multiplexer," Korea Patent No. 600818, July 6, 2006.

5.    Changsoo Kwak, Manseok Uhm, Inbok Yom, Juseop Lee, and Sohyeun Yun, "Screwdriver-and-nutwrench-combined tuning tool for radio frequency filters," Korea Patent No. 632299, Sept. 28, 2006.

6.    Juseop Lee, Manseok Uhm, Inbok Yom, and Jongheung Park, "Realization method of self-equalized multiple passband filter," Korea Patent No. 644271, Nov. 2, 2006.

7.    Juseop Lee, Manseok Uhm, and Inbok Yom, "A microwave filter using shifting transmission zeros and fabrication method thereof," Korea Patent No. 655662, Dec. 4, 2006.

8.    Manseok Uhm, Juseop Lee, Sohyeun Yun, and Inbok Yom, "Filter coupled by the conductive plates with a curved surface," Korea Patent No. 703719, Mar. 29, 2007.

9.    Chang-soo Ahn, Juseop Lee, Tae-Hak Lee, Kangho Lee, Korea Patent No. 10-1510621, Apr. 3, 2015.

10.  Tae-Hak Lee, Kangho Lee, Juseop Lee, G. C. Park, Korea Patent No. 10-1525518, May 28, 2015.

11.  Juseop Lee, Boyoung Lee, Korea Patent No. 10-1740853, May 22, 2017.

12.  J. Y. Jeong, C. H. Lee, Juseop Lee, B. Lee, B. Koh, Korea Patent No. 10-1884984, July 27, 2018.