Publications

Publications (Journals)

  • X. Lu, S. Venkatesh, B. Tang and K. Sengupta, “Physical Layer Security Through Directional Modulation With Spatio-Temporal Millimeter-Wave Transmitter Arrays,” in IEEE Journal of Solid-State Circuits, vol. 59, no. 9, pp. 2831-2847, Sept. 2024
  • W. Gao, C. Han, X. Lu and Z. Chen, “On Multiple-Antenna Techniques for Physical-Layer Range Security in the Terahertz Band,” in IEEE Open Journal of the Communications Society, vol. 5, pp. 3089-3103, 2024.
  • H. Tang, S. Venkatesh, Z. Lin, X. Lu, H. Saeeidi, M. Javanmard, K. Sengupta, “High Sensitivity and High Throughput Magnetic Flow CMOS Cytometers with 2D Oscillator Array and Inter-Sensor Spectrogram Cross-correlation,” in IEEE Transactions on Biomedical Circuits and Systems, doi: 10.1109/TBCAS.2024.3367668.
  • S. Venkatesh, D. Sturm, X. Lu, RJ. Lang, K. Sengupta. “Origami Microwave Imaging Array: Metasurface Tiles on a Shape‐Morphing Surface for Reconfigurable Computational Imaging (Adv. Sci. 28/2022)”. Adv Sci (Weinh). 2022 Oct 5;9(28):2270177.
  • Z. Yu, X. Lu*,  C. Gu, S. Venkatesh, and J. Mao, “mmWave Spatial-Temporal Single Harmonic Switching Transmitter Arrays for High back-off Beamforming Efficiency,” in IEEE Transactions on Antennas and Propagation, vol. 70, no. 9, pp. 8122-8136, Sept. 2022.
  • S. Venkatesh†, X. Lu†, B. Tang, and K. Sengupta, “Secure space–time-modulated millimetre-wave wireless links that are resilient to distributed eavesdropper attacks,” Nat Electron 4, 827–836 (2021).
  • K. Sengupta, L. Hong, C. Zhu and X. Lu, “Visible and Near-IR Nano-Optical Components and Systems in CMOS,” in IEEE Open Journal of the Solid-State Circuits Society, vol. 1, pp. 247-262, 2021, doi: 10.1109/OJSSCS.2021.3116563.
  • X. Lu, C. Chappidi, X. Wu, and K. Sengupta, “Antenna Preprocessing and Element Pattern Shaping for Multi-band mmWave Arrays: Multi-port Receivers and Antennas,” IEEE J. Solid-State Circuits, vol. 55, no. 6, pp. 1455-1470, June 2020.
  • X. Lu, S. Venkatesh, and H. Saeidi, “A Review on Applications of Integrated Terahertz Systems,” China Communications, accepted.
  • S. Venkatesh, X. Lu, H. Saeidi, and K. Sengupta, “Reconfigurable Multifunctional Terahertz Holographic Metasurface using CMOS Chip Tiling,” IEEE Antennas and Propagation Magazine, submitted.
  • H. Saeidi, S. Venkatesh, X. Lu, and K. Sengupta, “Chip-Scale THz System for Single-Shot Angular Localization,” IEEE Antennas and Propagation Magazine, submitted.
  • S. Venkatesh, X. Lu, H. Saeidi, and K. Sengupta, “Programmable Terahertz Metasurface with Circuit-coupled Meta-elements in Silicon Chips, IEEE APS Magazine, submitted.
  • H. Saeidi*, S. Venkatesh*, X. Lu, and K. Sengupta, “THz Prism: One-Shot Simultaneous Localization of Multiple Wireless Nodes with Leaky-wave THz Antennas and Transceivers in CMOS,” IEEE J. Solid-State Circuits, , vol. 56, no. 12, pp. 3840-3854, Dec. 2021, doi: 10.1109/JSSC.2021.3115407.
  • S. Venkatesh, X. Lu, H. Saeidi, and K. Sengupta, “A High-Speed Programmable and Scalable Terahertz Holographic Metasurface based on Tiled CMOS Chips,” Nature Electronics, Dec. 2020.
  • X. Lu, L. Hong, K. Sengupta, “CMOS Optical PUFs Using Noise Immune Process Sensitive Photonic Crystals Incorporating Passive Variations for Robustness,” IEEE J. Solid-State Circuits, vol. 53, no. 9, pp. 2709-2721, Sept. 2018.
  • C. Chappidi, X. Lu, X. Wu, and K. Sengupta, “Antenna Preprocessing and Element-Pattern Shaping for Multi-band mmWave Arrays: Multi-port Transmitters and Antennas,” IEEE J. Solid-State Circuits, vol. 55, no. 6, pp. 1441-1454, June 2020.
  • Yang, X. Lu, A. Babakhani, “A Free-Space Optically Locked VCO With Picosecond Timing Jitter in 0.18-µm CMOS,” IEEE Photonics Technology Letters, vol. 26, no. 12, pp. 1180-1183, June 2014.

Publications (Peer-reviewed Conference Papers)

  • S. Yu, X. Chen, B. Pillai, Y. Zhao, L. Wu, J. Mao, S. Venkatesh, X. Lu, “Analog Kramers-Kronig W-Band Direct Detection Receiver with 35mW DC Power in 65nm CMOS,” 2024 IEEE/MTT-S International Microwave Symposium – IMS 2024, Washington, DC, USA, 2024, pp. 1073-1076.
  • Z. Akram, Y. Shen and X. Lu, “Time-Modulated Circular Array for Single-Sideband OAM Beam Steering,” 2023 Asia-Pacific Microwave Conference (APMC), Taipei, Taiwan, 2023, pp. 55-57.
  • Z. Akram, X. Chen and X. Lu, “Phase and Amplitude Reconfigurable Transmissive Unit Cell Design at Sub-THz Frequencies,” 2023 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), Chengdu, China, 2023, pp. 1-3.
  • Y. Zhou, C. Han and X. Lu, “A 21–27 GHz LNA-Mixer in a 180 nm SiGe BiCMOS Process,” 2023 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), Chengdu, China, 2023, pp. 01-03
  • W. Gu and X. Lu, “A K-Band Power Amplifier Design Based on 130 nm SiGe Technology with Gain Over 22.4 dB Operating Up to 120 ∘C,” 2023 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), Chengdu, China, 2023, pp. 1-3
  • S. Venkatesh, X. Lu, D. Sturm, K. Sengupta and R. J. Lang, “Metasurface Tiles on Conformable Origami Platforms for Adaptive and Sparse Computational Microwave Imaging,” 2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (USNC-URSI), Portland, OR, USA, 2023, pp. 1713-1714
  • S. Venkatesh, H. Saeidi, X. Lu and K. Sengupta, “Active Tunable Millimeter-wave Reflective Surface across 57-64 GHz for Blockage Mitigation and Physical Layer Security,” 2022 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), Denver, CO, USA, 2022, pp. 63-66
  • S. Venkatesh, X. Lu, H. Saeidi and K. Sengupta, “Electromagnetic-Circuit Co-design approach towards Reconfigurable Terahertz Holographic CMOS Metasurface,” 2021 Fifteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials), 2021, pp. 448-450, doi: 10.1109/Metamaterials52332.2021.9577177.
  • C. Li, Z. Yu, Y. Shen, R. Cai and X. Lu, “Spatial-temporal Programmable Metasurface for Single Channel Radiation,” 2021 IEEE Asia-Pacific Microwave Conference (APMC), 2021, pp. 431-433, doi: 10.1109/APMC52720.2021.9661847.
  • Z. Yu, C. Han, S. Venkatesh and X. Lu, “Design and Modeling of a 77 GHz Time-Modulated Transmitter Array for Enhanced Backoff Efficiency,” 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), 2021, pp. 1283-1284, doi: 10.1109/APS/URSI47566.2021.9703702.
  • Z. Yu, C. Han, Y. Zou and X. Lu, “Location and Angular Velocity Detection using a Circular Frequency Diverse Array Radar,” 2021 IEEE Asia-Pacific Microwave Conference (APMC), 2021, pp. 58-60, doi: 10.1109/APMC52720.2021.9661936.
  • S. Venkatesh, X. Lu, H. Saeidi, and K. Sengupta,  “Dynamically Programmable Terahertz Holographic Metasurface using CMOS IC Tiling,” 2021 Conference on Lasers and Electro-Optics (CLEO), 2021, pp. 1-2.
  • H. Saeidi, S. Venkatesh, X. Lu and K. Sengupta, “Spectrum-to-space mapping with 0.36 – 0.4 THz on-chip transceiver for one-shot localization,” 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2021, pp. 1-2, doi: 10.1109/IRMMW-THz50926.2021.9567454.
  • H. Saeidi, S. Venkatesh, X. Lu, and K. Sengupta, “Integrated Terahertz Transceivers for Multi-node Link Discovery and Localization,”
  • 2021 Conference on Lasers and Electro-Optics (CLEO), 2021, pp. 1-2.
  • H. Saeidi, S. Venkatesh, X. Lu, and K. Sengupta, “On-Chip Multi-Layer THz Power Generation with Beamforming Capability,”
  • 2021 Conference on Lasers and Electro-Optics (CLEO), 2021, pp. 1-2.
  • H. Saeidi, S. Venkatesh, X. Lu and K. Sengupta, “THz Prism: One-shot Simultaneous Multi-node Angular Localization using Spectrum-to-Space Mapping with 360-400 GHz Broadband Transceiver and Dual-port Integrated Leaky Wave Antennas,”  ISSCC Dig. Tech. Papers, San Francisco, CA, USA, 2021, pp. 314-315.
  • K. Sengupta, X. Lu, S. Venkatesh, X. Wu, “Terahertz to bits and bits to terahertz: universally programmable chip-scale terahertz systems,” Proceedings of the 7th ACM International Conference on Nanoscale Computing and Communication. 2020, pp. 1-8.
  • X. Lu†, S. Venkatesh†, B. Tang, and K. Sengupta, “Space-Time Modulated 71 to 76 GHz mmWave Transmitter Array for Physically Secure Directional Wireless Links,” ISSCC Dig. Tech. Papers, San Francisco, CA, USA, 2020, pp. 86-88.
  • X. Lu, L. Hong, K. Sengupta, “An Integrated Optical Physically Unclonable Function Using Process Sensitive Sub-Wavelength Photonic Crystals in 65nm CMOS,” ISSCC Dig. Tech. Papers, San Francisco, CA, 2017, pp. 272-273.
  • X. Lu, X. Wu, H. Saeidi, and K. Sengupta, “A Multi-Port Dual Polarized Antenna Coupled mmWave CMOS Receiver with Element-level Pattern and Notch Programmability and Passive Interferer Rejection Capability,” 2019 IEEE Custom Integrated Circuits Conference (CICC), Austin, TX, USA, 2019, pp. 1-4.
  • X. Wu, H. Lu, X. Lu, and K. Sengupta, “A Programmable Active THz Electromagnetic Surface On-chip for Multi-functional Imaging,” International Microwave Symposium (IMS), Philadelphia, PA, 2018, pp. 1464-1467.
  • Hong, X. Lu, K. Sengupta, “Nano-optical systems in CMOS,” IEEE 60th International Midwest Symposium on Circuits and Systems (MWSCAS), Boston, MA, 2017, pp. 906-909.
  • Songhori, A. Mirhoseini, X. Lu, F. Koushanfar, “AHEAD: Automated Framework for Hardware-Accelerated Iterative Data Analysis,” Design, Automation & Test in Europe Conference & Exhibition (DATE), Grenoble, 2015, pp. 942-947.
  • Sengupta, X.Lu, S.Venkatesh, and B.Tang, “Nano-optical CMOS Systems for Bio-molecular Sensing: In-vitro and In-vivo”,2020 OSA Optical Sensors and Sensing Congress, Vancouver, Jun. 2020.

Patents

  • Venkatesh, X. Lu, B. Tang, and K. Sengupta, “Transmitter Array Architecture for Physically Secure Wireless Communication,” US Patent application number: 62/961,487, Jan. 2020.
  • K. Sengupta, X. Lu, C. Chappidi, and X. Wu, “System and Method for Transceiver and Antenna Programmability and Generalized MIMO Architectures,” US Patent application number: 16/453,461, Oct. 2020.

Talks