Scientific Research

Big-Data Electronics & Artificial-Intelligence Micro-Systems

Big-data (i.e., one Tb/s and beyond) transmission with artifical-intelligence operation is the trend in the future wireless transmission. Many applications of internet of everything (IoE) will improve the life-quality of human-beings and make the world connection closer. As one of the key micro-systems in the total big-data system, the on-chip transceiver demands novel proof-of-concepts to achieve requirements of high performance IoE system. Such transceiver aims to conquer new frontiers in terms of carrier frequency, signal processing, and RF semiconductor design.

Digitally-Assisted RF/Microwave/MM-Wave Integrated Circuits

With the aim to meet the requirement of low power & high efficiency wireless communication, the digital-assisted RF is the key solution. To increase the data-rates with enhanced bandwidth, microwave/mm-wave IC with digital-assisted techniques are the essential module in the whole system. New high efficiency architecture with novel low power circuits will be innovated and developed for minimizing the use of conventional digital/analog circuit functions by replacing them with digital equivalents RF/microwave/mm-wave, which are more amenable to scaling in advanced CMOS technologies.

On-Chip THz Communication

THz communication is one of the trend for future talk between things & human-beings. The heart-key elements, i.e., THz IC, should be carefully developed considering the process limits from Si-based process. Novel unit circuit, i.e., resonator, with improved physical meaning is dramatically demanded for THz active circuits design. Besides, THz IC with sub-system implementation should be higly developed with novelty. Consequently, there is a great need for reliable and feasiable passive devices and high-speed ICs intended for THz frequencies.

Reconfigurable Passive Circuits & Systems

For the coming 5G & future communication, data-rates and frequency spectrum are the limitation. For the front-end implemetation, reconfigurable mechanism should be highly developed for the multi-mode and multi-band operation. Novel tunable passive with simultaneous frequency and bandwidth adjustment is the essential key component in pratical communication system, which still remains chanllenges for scientific research and development.

Smart Sensor Network

To improve the life-quality of human-beings, sensor network is rapidly developed. Large numbers, low energy use, self-organization, collaborative signal processing, and querying ability are recognized great challenges for sensor network. Novel intelligence innovation is dramatically demanded to overcome these limits, especially for the field of smart array integrated circuits and systems with strong performance covering bands from MHz to THz.

Biomicroelectronics Integrated Systems

Biomicroelectronics is the discipline resulting from the convergence of biology and microelectronics, which has the potential to significantly impact many areas important to the human lifes with high-quality, such as the healthcare, protecting the environment, and food supply. There are many puzzles which should be deeply and widely investigated. As the key role of such system, integrated circuits with low-cost, low power, and multi function are highly required.

Multi-Dimensional Integrated Packaging

Packaging circuits and systems are always one of the key challenges in modern microelectronics systems. High performance with compact size and fashion view based on multi-dimensional new technologies is demanded, which can support the operation covering MHz up to THz. Not just the math, physics, and chemistry are fundamental requirements, also includes the development of material, implementation, and fabrication.

BEAM X-LAB has published leading researches in Industry & Acadamia including

Journal (Selected)

1. W. Chen, Y. Shu, J. Yin, P. Mak, X. Gao, and X. Luo, “A 21.8–41.6 GHz low jitter and high FoMj fast-locking sub-sampling PLL with dead zone automatic controller,” IEEE Trans. Microw. Theory Tech. (TMTT), early access, 2024.

2. X. Luo, B. Yang, Z. Deng, W. Chen, Y. Shu, and J. Zhou, “A phased-array transceiver with 2-dimension continuously auto link-tracking operation and time division modulator,” IEEE J. Solid-State Circuits (JSSC), early access, 2024.

3. G. Jin, F. Feng, W. Chen, Y. Shu, X. Luo, and X. Gao, “A fractional-N sampling PLL with a merged constant-slope DTC and sampling PD,” IEEE J. Solid-State Circuits (JSSC), early access, 2024.
   

4. F. Du, T. Xie, J. Wang, Z. Zhu, S. Wang, F. Hou, R. Chen, A. Han, D. Gao, Y. Liu, J. Liu, X. Luo, and Z. Liu, “All-directional silicon-controlled rectifier with improved voltage clamping capability for FinFET ESD protection,” IEEE Trans. Electron Devices (TED), early access, 2024.
   

5. J. Zhou, B. Yang, Y. Shu, and X. Luo, “A phase-modulation phase-shifting phased-array transmitter with phase self-calibration and deep PBOs efficiency enhancement,” IEEE J. Solid-State Circuits (JSSC), early access, 2024.

6. J. Zhou, B. Yang, Y. Shu, and X. Luo, “A W-band 2×2 phased-array transmitter with digital gain-compensation technique,” IEEE Trans. Circuits Syst. I, Reg. Papers (TCAS-I), early access, 2024.

7. Q. Li and X. Luo, “Three-port reflectionless down-converter for wideband and multi-channel receiver with flat gain, enhanced EVM, and high stability,” IEEE Trans. Microw. Theory Tech. (TMTT), early access, 2023.

8. C. Han, Z. Deng, Y. Shu, J. Yin, P. Mak, and X. Luo, “A 5.6 dB noise figure, 63-86 GHz receiver using a wideband noise-cancelling low noise amplifier with phase and amplitude compensation,” IEEE Trans. Circuits Syst. I, Reg. Papers (TCAS-I), vol. 71, no. 1, pp. 120–132, Jan. 2024.

9. Y. Shu and X. Luo, “Scalable inter-core-shaping multi-core oscillator with cancelled common-mode destructive coupling and robust common-mode resonance,” IEEE J. Solid-State Circuits (JSSC), vol. 58, no. 12, pp. 3308–3319, Dec. 2023.

10. Y. Li and X. Luo, “Adaptive synthesis using hybrid genetic algorithm and particle swarm optimization for reflectionless filter with lumped elements,” IEEE Trans. Microw. Theory Tech. (TMTT), vol. 71, no. 12, pp. 5317–5334, Dec. 2023.

11. A. Han, Y. Liu, Z. Liu, and X. Luo, “Compact wideband millimeter-wave ESD protection device with transformer-embedded DCSCR,” IEEE Electron Device Lett. (EDL), vol. 44, no. 9, pp. 1531–1534, Sep. 2023.

12. D. Tang and X. Luo, “On-chip mm-wave second-/third-order BPF and balun with wide stopband and low radiation loss using SIDGS resonators in 40-nm CMOS,” IEEE Trans. Microw. Theory Tech. (TMTT), vol. 71, no. 5, pp. 2178–2192, May 2023.

13. H. Tang, H. Qian, B. Yang, and X. Luo, “A self-calibration SCPA with storage capacitor array supporting 64-/256-/1024-QAM,” IEEE J. Solid-State Circuits (JSSC), vol. 58, no. 5, pp. 1241–1255, May 2023.

14. Z. Deng, C. Han, Y. Li, H. Qian, and X. Luo, “A 23–40 GHz phased-array receiver using 14-Bit phase-gain manager and wideband noise-cancelling LNA,” IEEE J. Solid-State Circuits (JSSC), vol. 58, no. 3, pp. 647–661, Mar. 2023.

15. B. Yang, H. Qian, J. Zhou, Y. Shu, and X. Luo, “Millimeter-wave quadrature mixed-mode transmitter with distributed parasitic canceling and LO leakage self-suppression,” IEEE J. Solid-State Circuits (JSSC), vol. 58, no. 3, pp. 691–704, Mar. 2023.
    

16. B. Yang, H. Qian, T. Wang, and X. Luo, “A CMOS wideband watt-level 4096-QAM digital power amplifier using reconfigurable power combining transformer,” IEEE J. Solid-State Circuits (JSSC), vol. 58, no. 2, pp. 357–370, Feb. 2023.

17. H. Li, Y. Shu, C. Pi, and X. Luo, “A 19.1–25.5-GHz compact dual-mode rotary traveling-wave oscillator with 195.4-dBc/Hz FoMT,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 32, no. 11, pp. 1347–1350, Nov. 2022.

18. D. Tang, H. Qian, Y. Dong, and X. Luo, “Compact 1.75–2.7 GHz tunable BPF with wide stopband up to 9.5 GHz using harmonic-controlled SIDGS resonators,” IEEE Trans. Circuits Syst. II, Exp. Briefs (TCAS-II), vol. 69, no. 11, pp. 4228–4232, Nov. 2022.

19. Z. Deng, H. Qian, and X. Luo, “A reflectionless receiver with absorptive IF amplifier and dual-path noise-cancelling LNA,” IEEE J. Solid-State Circuits (JSSC), vol. 37, no. 8, pp. 2309–2319, Aug. 2022.

20. Q. Li, H. Tang, D. Tang, Z. Deng, and X. Luo, “Compact SIDGS filtering power divider with three-port 10-GHz reflectionless range,” IEEE Trans. Circuits Syst. II, Exp. Briefs (TCAS-II), vol. 69, no. 7, pp. 3129–3133, Jul. 2022.

21. Y. Rao, H. Qian, J. Zhou, Y. Dong, and X. Luo, “Miniaturized 28GHz packaged bandpass filter with high selectivity and wide stopband using multi-layer PCB technology,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 32, no. 6, pp. 664–667, Jun. 2022. (IEEE MWCL Popular Ranking No.2, Jun. 2022)

22. G. Lin, Y. Dong, and X. Luo, “Miniaturized quarter-mode SIW filters loaded by dual-mode microstrip resonator with high selectivity and flexible response,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 32, no. 6, pp. 660–663, Jun. 2022. (IEEE MWCL Popular Ranking No.3, Jun. 2022)

23. A. Han, J. Zhou, F. Du, Z. Liu, and X. Luo, “A millimeter-wave broadband reflectionless ESD protection device,” IEEE Electron Device Lett. (EDL), vol. 43, no. 6, pp. 926–929, Jun. 2022.

24. F. Du, K.-C. Chang, X. Lin, F. Hou, Y. Zhang, A. Han, X. Luo, and Z. Liu, “Compact and fast response dual-directional SCR for nanoscale ESD protection engineering,” IEEE Trans. Electron Devices (TED), vol. 69, no. 6, pp. 3490–3493, Jun. 2022.

25. J. Xie, D. Tang, Y. Shu, and X. Luo, “Compact UWB BPF with broad stopband based on loaded-stub and C-shape SIDGS resonators,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 32, no. 5, pp. 383–386, May 2022. (IEEE MWCL Popular Ranking No.4, May 2022)

26. Y. Shu, H. Qian, X. Gao, and X. Luo, “A low phase noise and high FoM distributed-swing-boosting multi-core oscillator using harmonic-impedance-expanding technique,” IEEE J. Solid-State Circuits (JSSC), vol. 56, no. 12, pp. 3728–3739, Dec. 2021.

27. B. Yang, H. Qian, and X. Luo, “Quadrature switched/floated capacitor power amplifier with reconfigurable self-coupling canceling transformer for deep back-off efficiency enhancement,” IEEE J. Solid-State Circuits (JSSC), vol. 56, no. 12, pp. 3715–3727, Dec. 2021.

28. H. Qian, J. Zhou, B. Yang, and X. Luo, “A 4-element digital modulated polar phased-array transmitter with phase modulation phase-shifting,” IEEE J. Solid-State Circuits (JSSC), vol. 56, no. 11, pp. 3331–3347, Nov. 2021.

29. Z. Deng, J. Zhou, H. Qian, and X. Luo, “A 22.9-38.2-GHz dual-path noise-canceling LNA with 2.65-4.62-dB NF in 28-nm CMOS,” IEEE J. Solid-State Circuits (JSSC), vol. 56, no. 11, pp. 3348–3359, Nov. 2021. (IEEE JSSC Popular Ranking No.4, Nov. 2021)

30. J. Zhou and X. Luo, “An 820GHz down-converter with 4th subharmonic mixer in 40-nm CMOS technology,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 31, No. 10, pp. 1146–1149, Oct. 2021.

31. D. Tang and X. Luo, “Correction to “Compact filtering balun with wide stopband and low radiation loss using hybrid microstrip and substrate-integrated defected ground structure”,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 31, no. 10, pp. 1178–1178, Oct. 2021.

32. F. Du, K.-C. Chang, X. Lin, F. Hou, L. Chen, X. Luo, and Z. Liu, “Novel symmetrical dual-directional SCR with P-type guard ring for high-voltage ESD protection,” IEEE Trans. Electron Devices (TED), vol. 68, no. 8, pp. 4164–4167, Aug. 2021.

33. Y. Shu, H. Qian, and X. Luo, “A 2-D mode-switching quad-core oscillator using E-M mixed-coupling resonance boosting,” IEEE J. Solid-State Circuits (JSSC), vol. 56, no. 6, pp. 1711–1721, Jun. 2021.

34. J. Zhou, H. Qian, and X. Luo, “High-resolution wideband vector-sum digital phase shifter with on-chip phase linearity enhancement technology,” IEEE Trans. Circuits Syst. I, Reg. Papers (TCAS-I), vol. 68, no. 6, pp. 2457–2469, Jun. 2021.

35. Y. Shu, H. Qian, and X. Luo, “A cascaded mode-switching sub-sampling PLL with quadrature dual-mode voltage waveform-shaping oscillator,” IEEE Trans. Circuits Syst. I, Reg. Papers (TCAS-I), vol. 68, no. 6, pp. 2341–2353, Jun. 2021.

36. D. Tang and X. Luo, “Compact filtering balun with wide stopband and low radiation loss using hybrid microstrip and substrate-integrated defected ground structure,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 31, no. 6, pp. 549–552, Jun. 2021. (IEEE MWCL Popular Ranking No.2, Jun. 2021)

37. H. Qian, B. Yang, J. Zhou, H. Xu, and X. Luo, “A quadrature digital power amplifier with hybrid Doherty and impedance boosting for complex domain power back-off efficiency enhancement,” IEEE J. Solid-State Circuits (JSSC), vol. 56, no. 5, pp. 1487–1501, May 2021. (IEEE JSSC Popular Ranking No.10, May 2021)

38. Y. Shu, W. Chen, H. Qian, and X. Luo, “Low phase noise high efficiency power oscillator with digitally controlled output power,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 31, no. 5, pp. 477–480, May 2021.

39. W. Chen, Z. Deng, Y. Shu, H. Qian, and X. Luo, “Low NF and high P1dB wideband quasi-circulator with unequal power split and reconfigurable inter-stage matching,” IEEE Trans. Microw. Theory Tech. (TMTT), vol. 69, no. 4, pp. 2241–2252, Apr. 2021.

40. J. Zhou, Y. Rao, D. Yang, H. Qian, and X. Luo, “Compact wideband BPF with wide stopband using substrate integrated defected ground structure,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 31, no. 4, pp. 353-356, Apr. 2021. (IEEE MWCL Popular Ranking No.1, Apr. 2021)

41. C. Han, D. Tang, Z. Deng, H. Qian, and X. Luo, “Filtering power divider with ultrawide stopband and wideband low radiation loss using substrate integrated defected ground structure,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 31, no. 2, pp. 113-115, Feb. 2021. (IEEE MWCL Popular Ranking No.6, Feb. 2021)

42. D. Tang, C. Han, Z. Deng, H. Qian, and X. Luo, “Substrate integrated defected ground structure for single- and dual-band bandpass filters with wide stopband and low radiation loss,” IEEE Trans. Microw. Theory Tech. (TMTT), vol. 69, no. 1, pp. 659–670, Jan. 2021. (IEEE TMTT Popular Ranking No.2, Jan. 2021)
    

43. T. Wang, H. Qian, B. Yang, and X. Luo, “1.2–2.8 GHz 32.4 dBm digital power amplifier with balance compensated matching network,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 31, no. 1, pp. 41–43, Jan. 2021. (IEEE MWCL Popular Ranking No.4, Jan. 2021)

44. X. Luo, H. Qian, Y. Yin, and H. Xu, “Empowering multifunction: digital power amplifier, the last RF frontier of the analog and the digital kingdoms,” IEEE Microw. Magazine (MMAG), vol. 21, no. 12, pp. 47–67, Dec. 2020. (Invited Paper, IEEE Microwave Magazine Popular Ranking No.1, Nov. 2020)

45. Z. Deng, J. Zhou, H. Qian, and X. Luo, “High resolution reconfigurable phase-tuning line using self-shielded 3-D interdigital capacitor,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 30, no. 6, pp. 605–608, Jun. 2020.

46. W. Yu, Y. Rao, H. Qian, and X. Luo, “A reflectionless filtering 90° coupler using stacked cross coupled-line and loaded cross-stub,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 30, no. 5, pp. 481–484, May 2020. (IEEE MWCL Popular Ranking No.4, May 2020)

47. H. Qian, Y. Shu, J. Zhou, and X. Luo, “A 20–32-GHz quadrature digital transmitter using synthesized impedance variation compensation,” IEEE J. Solid-State Circuits (JSSC), vol. 55, no. 5, pp. 1297–1309, May 2020.

48. C. Liu, Y. Rao, Z. Deng, W. Li, and X. Luo, “Marshalling access: four-channel switchable filter bank,” IEEE Microw. Magazine (MMAG), vol. 21, no. 1, pp. 73–81, Jan. 2020. (IEEE IMS2019 Student Design Competition Winner for the category of Four-Channel Switchable/Reconfigurable Filter Bank)

49. Y. Shu, H. Qian, and X. Luo, “A 169.6 GHz low phase noise and wideband hybrid mode-switching push-push oscillator,” IEEE Trans. Microw. Theory Tech. (TMTT), vol. 67, no. 7, pp. 2769–2781, Jul. 2019.

50. Z. Deng, H. Qian, and X. Luo, “Tunable quasi-circulator based on a compact fully-reconfigurable 180° hybrid for full-duplex transceivers,” IEEE Trans. Circuits Syst. I, Reg. Papers (TCAS-I), vol. 66, no. 8, pp. 2949–2962, Aug. 2019. (IEEE TCAS-I Popular Ranking No.6, May 2019)

51. X. Luo, B. Yang, and H. Qian, “Adaptive synthesis for resonator-coupled filters based on particle swarm optimization,” IEEE Trans. Microw. Theory Tech. (TMTT), vol. 67, no. 2, pp. 712–725, Feb. 2019.

52. H. Qian, B. Zhang, and X. Luo, “High resolution wideband phase shifter with current limited vector-sum,” IEEE Trans. Circuits Syst. I, Reg. Papers (TCAS-I), vol. 66, no. 2, pp. 820–833, Feb. 2019.

53. J. Deng, Y. Yang, Z. Zhu, and X. Luo, “A 140–220 GHz balanced doubler with 8.7–12.7% efficiency,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 28, no. 6, pp. 515–517, Jun. 2018.

54. Z. Deng, Z. Tian, H. Qian, and X. Luo, “A metamorphosed roadway: dual-band variable-attenuation notch filters,” IEEE Microw. Magazine (MMAG), vol. 19, no. 2, pp. 70–76, Mar. 2018. (IEEE IMS2017 Student Design Competition Winner for the category of Dual-Band Variable-Attenuation Notch Filters)

55. J. Zhou, H. Qian, and X. Luo, “Compact wideband phase shifter using microstrip self-coupled line and broadside-coupled microstrip/CPW for multi-phase feed-network,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 27, no. 9, pp. 791–793, Sep. 2017. (IEEE MWCL Popular Ranking No.1, Sep. 2017)

56. H. Qian, J. O. Liang, and X. Luo, “Wideband digital power amplifiers with efficiency improvement using 40-nm LP CMOS technology,” IEEE Trans. Microw. Theory Tech. (TMTT), vol. 64, no. 3, pp. 675–687, Mar. 2016. (IEEE TMTT Popular Ranking No.1, Apr. 2016)

57. H. Qian and X. Luo, “Compact 6.5-28.5 GHz on-chip balun with enhanced inband balance responses,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 26, no. 12, pp. 993–995, Dec. 2016.

58. X. Luo, S. Sun, et al., “Tunable bandpass filter with two adjustable transmission poles and compensable coupling,” IEEE Trans. Microw. Theory Tech. (TMTT), vol. 62, no. 9, pp. 2003–2013, Sep. 2014. (IEEE TMTT Popular Ranking No.1, Sep. 2014)

59. A. Li, S. Zheng, J. Yin, X. Luo, and H. C. Luong, “A 21–48 GHz subharmonic injection-locked fractional-N frequency synthesizer for multiband point-to-point backhaul communications,” IEEE J. Solid-State Circuits (JSSC), vol. 8, no. 49, pp. 1785–1799, Aug. 2014. (IEEE JSSC Popular Ranking No.13, Aug. 2014)

60. X. Luo, J.-G. Ma, K. S. Yeo, and E.-P. Li, “Compact ultra-wideband (UWB) bandpass filter with dual- and quad-notched bands,” IEEE Trans. Microw. Theory Tech. (TMTT), vol. 59, no. 6, pp. 1509–1519, Jun. 2011. (IEEE TMTT Popular Ranking No.2, Jul. 2011)

61. X. Luo, J.-G. Ma, E.-P. Li, and K. Ma, “Hybrid microstrip T-stub/defected ground structure cell for electromagnetic interference bandpass filter design,” IEEE Trans. Electromagnetic Compatibility (TEMC), vol. 53, no. 3, pp. 717–725, Aug, 2011. (IEEE TEMC Popular Ranking No.10, Sep. 2011)

62. X. Luo, J.-G. Ma, and E.-P. Li, “Hybrid microstrip/DGS cell for filter design,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 21, no. 10, pp. 528–530, Oct. 2011.

63. X. Luo, J.-G. Ma, and E.-P. Li, “Wideband bandpass filter with wide stopband using loaded BCMC stub and short-stub,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 21, no. 7, pp. 353–355, Jul. 2011.

64. X. Luo, J.-G. Ma, K. Ma, and K. S. Yeo, “Compact UWB bandpass filter with ultra narrow notched band,” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 20, no. 3, pp. 145–147, Mar. 2010.

65. X. Luo, H. Qian, J.-G. Ma, K. Ma, and K. S. Yeo, “Compact dual-band bandpass filters using novel embedded spiral resonator (ESR),” IEEE Microw. Wireless Compon. Lett. (MWCL), vol. 20, no. 8, pp. 435–437, Aug. 2010.

Conference (Selected)

1. C. Wang and X. Luo, “A compact 1.08–5.94 GHz balun with 1 degree/0.07 dB phase-/amplitude-imbalances using reverse series paths,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Washington, DC, USA, Jun. 2024.

2. W. Chen, Y. Shu, and X. Luo, “A 0.2-to-39.2GHz 66.2-fs jitter and –71.3dBc spur fast-locking PLL using DAC-based constant control voltage compensator and quad-mode 2nd harmonic filtering oscillator,” in IEEE RFIC, Washington, DC, USA, Jun. 2024.

3. C. Han and X. Luo, “A -10.1dBm IIP3, 0.3-40GHz receiver using hybrid-path band-selection with reduced LO coverage bandwidth supporting 480Mb/s 4096-QAM and 7.2Gb/s 64-QAM modulation,” in IEEE Custom Integrated Circuits Conf. (CICC), Denver, CO, USA, Apr. 2024.

4. J. Zhou, C. Han, W. Chen, B. Yang, and X. Luo, “A 71-to-86GHz, 20.4dBm Pout, 6.0dB NF transceiver with quadrature direct-modulated transmitter and reflectionless heterodyne receiver in 40nm CMOS,” in IEEE Asian Solid-State Circuits Conf. (ASSCC), Haikou, China, Dec. 2023.

5. Q. Luo, Y. Rao, Y. Shu, and X. Luo, “Miniaturized 7–12 GHz 1-to-4 differential power splitter with low amplitude/phase imbalances using broadside-coupled CPW/SIDGS scheme and embedded CPW spur-line,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), San Diego, CA, USA, Jun. 2023.

6. S. Zhang, Y. Rao, Y. Dong, and X. Luo, “Input-reflectionless 2.4–3.8 GHz balun with low phase/amplitude imbalance using stacked-coupled microstrip line,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), San Diego, CA, USA, Jun. 2023.

7. J. Xie, W. Chen, D. Tang, Y. Shu, and X. Luo, “1.26–2-GHz miniaturized tunable bandpass filter with constant absolute bandwidth and wide stopband using two-path electrical complementary coupling,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), San Diego, CA, USA, Jun. 2023.

8. Y. Wan, J. Zhou, Y. Rao, J. Xie, Q. Li, and X. Luo, “Independently tunable compact dual-band bandpass filter with high selectivity and wide stopband using multilayer folded dual-mode SIDGS resonator,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), San Diego, CA, USA, Jun. 2023.

9. Y. Yang, Y. Rao, D. Tang, J. Zhou, and X. Luo, “Compact 12–18-GHz bandpass filter with wide stopband using hybrid dual-mode SIDGS/ microstrip resonant cell,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), San Diego, CA, USA, Jun. 2023.

10. Z. Deng, B. Yang, J. Zhou, C. Han, Y. Li, Y. Shu, and X. Luo, “An 8-element 23–40 GHz continuously auto link-tracking phased-array transceiver with time division modulator achieving 7us tracking time, 25.3% TX system efficiency, 800MHz-64QAM modulation for 5G NR,” in IEEE Custom Integrated Circuits Conf. (CICC), San Antonio, TX, USA, Apr. 2023.

11. W. Chen, Y. Shu, and X. Luo, “A 21.8–41.6GHz fractional-N sub-sampling PLL with dividerless unequal-REF-delay frequency-locked loop achieving –246.9dB FoMj and –270.3 FoMj,N,” in IEEE Custom Integrated Circuits Conf. (CICC), San Antonio, TX, USA, Apr. 2023.

12. Y. Shu, Z. Deng, and X. Luo, “A 28GHz scalable inter-core-shaping multi-core oscillator with DM/CM-configured coupling achieving 193.3dBc/Hz FoM and 205.5dBc/Hz FoMA at 1-MHz offset,” in IEEE ISSCC, San Francisco, CA, USA, Feb. 2023.

13. C. Han, J. Zhou, Z. Deng, Y. Shu, and X. Luo, “A 4.8dB NF, 70−86GHz deep-noise-canceling LNA using asymmetric compensation transformer and 4-to-1 hybrid-phase combiner in 40-nm CMOS,” in IEEE ISSCC, San Francisco, CA, USA, Feb. 2023.

14. B. Yang, Z. Deng, H. Qian, and X. Luo, “71–89GHz 12Gb/s double-edge-triggered quadrature RFDAC with LO leakage suppression achieving 20.5dBm peak output power and 20.4% system efficiency,” in IEEE ISSCC, San Francisco, CA, USA, Feb. 2023.

15. W. Chen, Y. Shu, H. Qian, J. Yin, P.-I. Mak, X. Gao, and X. Luo, “A 21.8–41.6GHz fast-locking sub-sampling PLL with dead zone automatic controller achieving 62.7-fs jitter and –250.3dB FoM,” in IEEE RFIC, Denver, CO, USA, Jun. 2022. (RFIC2022 Best Student Paper Award Finalist)
    

16. J. Zhou, H. Qian, B. Yang, and X. Luo, “A quadrature-rotation phased-array transmitter with 15-bit phase tuning and 0/3/6/9/12/15-dB PBOs efficiency enhancement,” in IEEE RFIC, Denver, CO, USA, Jun. 2022.
    

17. H. Tang, H. Qian, B. Yang, T. Wang, and X. Luo, “A polar Doherty SCPA with 4.4º AM-PM distortion using on-chip self-calibration supporting 64-/256-/1024-QAM,” in IEEE RFIC, Denver, CO, USA, Jun. 2022.
    

18. Y. Rao, H. Qian, J. Zhou, Y. Dong, and X. Luo, “Miniaturized 28GHz packaged bandpass filter with high selectivity and wide stopband using multi-layer PCB technology,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Denver, CO, USA, Jun. 2022. (IMS2022 Best Student Paper Award Finalist & IMS2022 Advanced Practice Paper Award Finalist, IMS Top50 Paper)

19. G. Lin, Y. Dong, and X. Luo, “Miniaturized quarter-mode SIW filters loaded by dual-mode microstrip resonator with high selectivity and flexible response,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Denver, CO, USA, Jun. 2022. (IMS Top50 Paper)

20. C. Pi, H. Qian, T. Wang, J. Zhou, Z. Deng, Y. Shu, and X. Luo, “A 140-500GHz CMOS THz spectroscope with 1 MHz resolution based on multi-branch rotational symmetric sensing surface,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Denver, CO, USA, Jun. 2022.

21. Y. Zhou, D. Tang, Y. Rao, Y. Dong, and X. Luo, “Miniaturized tri-band bandpass filter with wide stopband using stacked-coupled SIDGS resonators,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Denver, CO, USA, Jun. 2022.

22. Y. Zhu, Y. Dong, X. Luo, and J. Bornemann, “Dual-band SIW filter with widely separated passbands based on TE101 and TE301 modes,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Denver, CO, USA, Jun. 2022.

23. M. Jia, Y. Dong, J. Zhang, and X. Luo, “Multilayer composite right/left-hand transmission line with ultra-wideband and miniaturized characteristics,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Denver, CO, USA, Jun. 2022.
    

24. Z. Deng, H. Qian, C. Han, Y. Li, and X. Luo, “A 3.8-dB NF, 23-40GHz phased-array receiver with 14-bit phase & gain manager and calibration-free dual-mode 28-52dB image rejection ratio for 5G NR,” in IEEE Custom Integrated Circuits Conf. (CICC), Newport Beach, CA, USA, Apr. 2022. (CICC2022 Best Student Paper Award Finalist)

25. J. Zhou, H. Qian, B. Yang, Y. Shu, and X. Luo, “A phase-modulation phase-shifting phased-array transmitter with 10-bit fast-locking phase self-calibration and 0/2.5/6/12dB power back-offs efficiency enhancement,” in IEEE Custom Integrated Circuits Conf. (CICC), Newport Beach, CA, USA, Apr. 2022.

26. B. Yang, H. Qian, Y. Shu, J. Zhou, and X. Luo, “22-30GHz quadrature hybrid SCPA with LO leakage self-suppression and distributed parasitic-cancelling sub-PA array for linearity and efficiency enhancement,” in IEEE Custom Integrated Circuits Conf. (CICC), Newport Beach, CA, USA, Apr. 2022.

27. B. Yang, H. Qian, Y. Shu, J. Zhou, and X. Luo, “Watt-level triple-mode quadrature SFCPA with 56 peaks for ultra-deep PBO efficiency enhancement using IQ intrinsic interaction and adaptive phase compensation,” in IEEE Custom Integrated Circuits Conf. (CICC), Newport Beach, CA, USA, Apr. 2022.

28. Y. Shu, H. Qian, X. Gao, and X. Luo, “A 3.09-to-4.04GHz distributed-boosting and harmonic-impedance-expanding multi-core oscillator with -138.9dBc/Hz at 1MHz offset and 195.1dBc/Hz FoM,” in IEEE ISSCC, Virtual, Feb. 2021. (ISSCC2021 RF Session Highlight)

29. B. Yang, H. Qian, and X. Luo, “A watt-level quadraqure switched/floated-capacitor power amplifer with back-off efficiency enhancement in complex domain using reconfigurable self-coupling cancelling transformer,” in IEEE ISSCC, Virtual, Feb. 2021.

30. Y. Shu, H. Qian, X. Gao, and X. Luo, “A 2.3-to-3.2GHz Class-G impedance-modulation power oscillator with 10dBm peak pout and 39%/37%/33%/30% efficiency at 0/3/6/9dB PBOs,” in IEEE RFIC, Atlanta, GA, USA, Jun. 2021.

31. J. Gao, F. Feng, X. Gao, W. Chen, Y. Shu, and X. Luo, “A 3.3-4.5GHz fractional-N sampling PLL with a merged constant slope DTC and sampling PD in 40nm CMOS,” in IEEE RFIC, Atlanta, GA, USA, Jun. 2021. (RFIC2021 Best Student Paper Award, 3rd Place)

32. X. Deng, Y. Rao, K. Huang, J. Zhou, W. Su, and X. Luo, “A high efficiency D-band 32-channel radial waveguide power divider/combiner,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Atlanta, GA, USA, Jun. 2021. (IMS2021 Advanced Practice Paper Award Finalist)

33. Z. Deng, H. Qian, and X. Luo, “A 3.6dB NF, 23–39GHz reflectionless RX with absorptive amplifier and dual-path noise cancelling LNA supporting 64-QAM/256-QAM/1024-QAM for 5G NR,” in IEEE Custom Integrated Circuits Conf. (CICC), Virtual, Apr. 2021.

34. Z. Peng, J. Zhou, Y. Rao, Z. Deng, and X. Luo, “Compact bandpass filter with wide stopband and low radiation using fully-packaged substrate integrated defected ground structure,” in IEEE Int. Symp. Radio-Freq. Integra. Techn. (RFIT), Taipei, Taiwan, Aug. 2021.

35. Z. Chi, Y. Rao, Z. Deng, C. Han, and X. Luo, “Wideband filtering balun with wide stopband and imbalance compensation using hybrid DGS with float strip-line,” in IEEE Int. Symp. Radio-Freq. Integra. Techn. (RFIT), Taipei, Taiwan, Aug. 2021.

36. Y. Shu, H. Qian, and X. Luo, “A 18.6-to-40.1GHz 201.7dBc/Hz FoMT multi-core oscillator using E-M mixed-coupling resonance boosting,” in IEEE ISSCC, San Francisco, CA, USA, Feb. 2020.

37. H. Qian, B. Yang, J. Zhou, H. Xu, and X. Luo, “A quadrature digital power amplifier with hybrid Doherty and impedance boosting for efficiency enhancement in complex domain,” in IEEE RFIC, Los Angeles, CA, USA, Jun. 2020.

38. B. Yang, H. Qian, T. Wang, and X. Luo, “1.2–3.6 GHz 32.67 dBm 4096-QAM digital PA using reconfigurable power combining transformer for wireless communication,” in IEEE RFIC, Los Angeles, CA, USA, Jun. 2020.

39. D. Tang, C. Han, Z. Deng, H. Qian, and X. Luo, “Compact bandpass filter with wide stopband and low radiation loss using substrate integrated defected ground structure,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Los Angeles, CA, USA, Jun. 2020. (IMS2020 Best Student Paper Award Finalist & IMS2020 Advanced Practice Paper Award Finalist)

40. X. Deng, Y. Tian, K. Huang, J. Jiang, Y. He, J. Zhou, W. Su, and X. Luo, “A 315–340 GHz frequency amplifier/multiplier chain with 8.5 dBm peak output power,” in IEEE MTT-s Int. Wireless Symp. (IWS), Shanghai, China, May. 2020. (IWS2020 Best Student Paper Award Finalist)

41. W. Li, H. Qian, and X. Luo, “A 21.6–45 GHz low-profile wideband slot antenna array for 5G wireless,” in IEEE AP-S/URSI, Montréal, Canada, Jun. 2020.

42. B. Yang, H. Qian, J. Zhou, Y. Shu, and X. Luo, “A 90-98 GHz 2×2 phased-array transmitter with high resolution phase control and digital gain compensation,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Boston, MA, USA, Jun. 2019. (IMS2019 Best Student Paper Award Finalist)

43. X. Liu, J. Zhou, Z. Deng, and X. Luo, “Compact wideband marchand balun with amplitude and phase compensation shield,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Boston, MA, USA, Jun. 2019. (IMS2019 Best Student Paper Award Finalist)

44. W. Chen, Y. Shu, Z. Deng, H. Qian, and X. Luo, “A wideband quasi-circulator with low NF and high P1dB using noise-canceling technique,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Boston, MA, USA, Jun. 2019.

45. Z. Tian, Y. Rao, Z. Deng, and X. Luo, “Reconfigurable dual-band filtering power divider with ultra-wide stopband using hybrid microstrip/square defected ground structure,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Boston, MA, USA, Jun. 2019.

46. C. Liu, Z. Deng, X. Liu, and X. Luo, “A wideband bandpass filter with broad stopband and ultra-wide reflectionless range for 5G applications,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Boston, MA, USA, Jun. 2019.  (IMS2019 Sixty-Second Presentation Competition Award)

47. H. Qian, Y. Shu, J. Zhou, and X. Luo, “A 20-32GHz digital quadrature transmitter with notched-matching and mode-switch topology for 5G wireless and backhaul,” in IEEE RFIC, Boston, MA, USA, Jun. 2019.

48. C. Han, Y. Rao, H. Qian, and X. Luo, “High-selectivity bandpass filter with wide upper stopband using harmonic suppression structure,”in IEEE Int. Symp. Radio-Freq. Integra. Techn. (RFIT), Nanjing, China, Aug. 2019. (RFIT2019 Best Student Paper Award, 3rd Place)

49. Y. Shu, H. Qian, and X. Luo, “A 169.6 GHz hybrid mode-switching push-push oscillator with 21.7% tuning range and 180.6dBc/Hz FoMT in 28nm CMOS technology,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Philadelphia, PA, USA, Jun. 2018.

50. Z. Deng, H. Qian, and X. Luo, “A compact quasi-circulator with high isolation using reconfigurable 180° hybrid,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Philadelphia, PA, USA, Jun. 2018.

51. J. Ren, H. Qian, and X. Luo, “A wideband filtering balun using CPW-to-slotline transitions,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Philadelphia, PA, USA, Jun. 2018. (IMS2018 Best Student Paper Award Finalist)

52. L. Fan, H. Qian, B. Yang, G. Wang, and X. Luo, “Filtering power divider with wide stopband using open-stub loaded coupled-line and hybrid microstrip T-stub/DGS cell,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Philadelphia, PA, USA, Jun. 2018.

53. Y. Rao, H. Qian, R. Gomez-Garcia, and X. Luo, “Dual-band bandpass filter with ultra-wide upper stopband using slow-wave dual-resonance cells,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Philadelphia, PA, USA, Jun. 2018.

54. Y. Shu, H. Qian, and X. Luo, “A 20.7-31.8GHz dual-mode voltage waveform-shaping oscillator with 195.8dBc/Hz FoMT in 28nm CMOS,” in IEEE RFIC, Philadelphia, PA, USA, Jun. 2018.

55. Y. Shu, H. Qian, and X. Luo, “A 173 GHz transformer-based push-push oscillator with 11.2% tuning range in 28nm CMOS,” in IEEE MTT-s Int. Wireless Symp. (IWS), Chengdu, China, May. 2018. (IWS2018 Best Student Paper Award, 2nd Place)

56. Z. Tian, H. Qian, and X. Luo, “Reconfigurable dual-band bandpass filter with fully-switch operation using λ/2 folded-resonator with varactor-loaded open-stub,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Honolulu, HI, Jun. 2017.

57. J. Zhou, H. Qian, D. Huang, and X. Luo, “Ultra-wideband (UWB) wilkinson power divider with ultra-narrow dual-notched bands using embedded CPW resonators,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Honolulu, HI, Jun. 2017.

58. H. Qian, J. O. Liang, N. Zhu, P. Gao, and X. Luo, “A 3-7GHz 4-element digital modulated polar phased-array transmitter with 0.35° phase resolution and 38.2% peak system efficiency,” in IEEE Custom Integrated Circuits Conf. (CICC), Austin, TX, May 2017.

59. H. Qian, J. O. Liang, N. Zhu, P. Gao, and X. Luo, “A 3.1–7 GHz 40-nm CMOS digital polar transmitter with high data-rate and feed-forward operation,” in IEEE Int. Symp. Radio-Freq. Integra. Techn. (RFIT), Taipei, Taiwan, Aug. 2016. (RFIT2016 Best Student Paper Award, 1st Place)

60. Y. Shu, B. Yang, H. Qian, and X. Luo, “Compact UWB antenna with quad-notched bands,” in IEEE AP-S/URSI, Puerto Rico, Jun. 2016.
    

61. X. Luo, et. al., “A waveform-shaping millimeter-wave oscillator with 184.7dBc/Hz FOM in 40nm digital CMOS process,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Phoenix, AZ, May 2015.

62. X. Luo, “On-chip CMOS THz resonant cell using hybrid coplanar-waveguide T-stub/defected ground structure,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Phoenix, AZ, May 2015.

63. H. Qian, J. O. Liang, and X. Luo, “A 3.5-9.5 GHz compact digital power amplifier with 39.3% peak PAE in 40nm CMOS technology,” in IEEE MTT-s Int. Wireless Symp. (IWS), Shenzhen, China, Apr. 2015. (IWS2015 Best Student Paper Award, 1st Place)

64. K. Han and X. Luo, “A 9.5–18.5 GHz power amplifier for multi-band microwave point-to-point backhaul communication,” in IEEE RFIC, Tamp Bay, FL, Jun. 2014.

65. X. Luo, “Compact ultra-wideband stacked-spiral-coupled balun using center-tapped float-shield and port-coupled compensation line,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Seattle, WA, Jun. 2013.

66. A. Li, S. Zheng, J. Yin, H. C. Luong and X. Luo, “A CMOS 21-48GHz fractional-N synthesizer employing ultra-wideband injection-locked frequency multipliers,” in IEEE Custom Integrated Circuits Conf. (CICC), San Jose, CA, Sep. 2013. (CICC2013 Best Student Paper Award Finalist)

67. X. Luo, S. Sun, and E.-P. Li, “Miniaturized dual-band bandpass filter using λ/2 spiral-resonator and loaded open-stub,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Montréal, Canada, Jun. 2012.

68. X. Luo, J.-G. Ma, and E.-P. Li, “Miniaturized bandpass filter with high selectivity and wide stopband using dual-layer structure,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Baltimore, MA, Jun. 2011.

69. X. Luo, H. Qian, J.-G. Ma, K. Ma, and K. S. Yeo, “A Compact UWB bandpass filter with ultra narrow notched band and competitive attenuation slope,” in IEEE MTT-S Int. Microwave Sym. Dig. (IMS), Anaheim, CA, May. 2010.

Granted Patent

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2. Polarization-based phased array transmitter, mobile terminal, EP3451542B1, 2023

3. Antenna and antenna array, CN115244781B, 2023

4. Four-mode oscillator based on electromagnetic hybrid coupling, CN111293981B, 2023

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6. Quasi-circulator with broadband, low noise and high power tolerance, CN111510108B, 2023

7. Radio frequency transmitter, CN114600377B, 2023

8. Phase shifter phase calibration circuit and calibration method thereof, CN114826206B, 2023

9. Double-path noise cancellation circuit of low-noise amplifier, CN1129686 74B, 2023

10. On-chip capacitor and communication system, CN111276462B, 2022

11. Miniaturized discrete coupling multicore oscillator, CN112968670B, 2022

12. Polar transmitter with tunable matching network, EP3648428B1, 2022
    

13. On-chip reconfigurable transmission line and communication system, CN111326839B, 2022
    

14. Capacitor unit, integrated capacitor, and resonance unit, US10998873B2, 2021
    

15. Transformer based on adjustable inductance, CN110739135B, 2021

16. Dielectric integrated defected ground structure device, filter and communication system, CN111342178B, 2021

17. Filtering power divider and communication system, CN112002979B, 2021

18. Capacitor unit, integrated capacitor, and resonant unit, KR102227706B1, 2021

19. Compact wide-stop-band-pass filter based on packaging defected ground structure, CN111628255B, 2021
    

20. Polarized phased array transmitter and mobile terminal, CN110291723B, 2021
    

21. Filtering unit and filter, EP3346543B1, 2020
    

22. Polar phased-array transmitter and mobile terminal, US10805143B2, 2020
    

23. Dual-mode oscillator and multi-phase oscillator, US10742167B2, 2020

24. Polar transmitter with tunable matching network, US10547488B2, 2020

25. Filtering unit and filter, US10673111B2, 2020
    

26. Resonant unit and filter comprising a defected ground structure, EP3258535B1, 2020

27. Phase shifter and feed network, EP3264521B1, 2020

28. Polar transmitter with tunable matching network, CN108370366B, 2020

29. Polar phased array transmitters and mobile terminals, KR102197460B1, 2020

30. Digital phase shifter, CN106656099B, 2020

31. The double notch resonators of mixed microstrip line/co-planar waveguide, trapper and electronic equipment, CN109449556B, 2020

32. Kinds of filtering units and filters, CN108028450B, 2020

33. Polar phased-array transmitter and mobile terminal, US10411943B2, 2019

34. Polar transmitter with tunable matching network, US10257015B2, 2019

35. Dual-mode oscillator and multi-phase oscillator, US10498289B2, 2019

36. Resonant unit and filter, US10276904B2, 2019

37. Phase shifter and feed network including a microstrip/coplanar waveguide coupling structure having vertical projections, US10461390B2, 2019

38. Polar transmitter with tunable matching network, EP3182664B1, 2019

39. Capacitor unit, integrated capacitor and resonance unit, CN108235782B, 2019

40. A kind of phase shifter and feeding network, CN105977583B, 2019

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46. Transmitter, receiver, and method for receiving and transmitting a radio frequency signal, US9264279B2, 2016

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50. Frequency multiplier and method for generating frequency multiplied signals, US9172297B2, 2015

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52. Frequency multiplier and method of generating frequency-multiplied signal, CN102714501B, 2014

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54. Integrated mobile communication device, CN201479388U, 2009

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