Publications/Patents

publications by categories in reversed chronological order. generated by jekyll-scholar.

Journal Papers

2025

  1. Nature_communication.jpg
    Deep-learning Enabled Generalized Inverse Synthesis of Multi-Port Radio-frequency and Sub-Terahertz Integrated Circuits
    Emir Ali Karahan, Zheng Liu, Jonathan Zhou, and 1 more author
    Nature Communications, 2025
    DOI
  2. IEEE Computer
    AI Enabling Discovery and Design of Radio and High-Frequency Wireless Chips Beyond Human Intuition
    Kaushik Sengupta, Jonathan Zhou, Zheng Liu, and 1 more author
    Computer, 2025
    DOI
  3. JMW.jpg
    Synthesized Design of Millimeter-Wave Low-Loss Wideband Bandpass Filter and Filtering Impedance Transformer in 90-nm (Bi)-CMOS Technology
    Xiaolong Huang, Zheng Liu, Emir Ali Karahan, and 1 more author
    IEEE Journal of Microwaves, 2025
    DOI

2024

  1. IEEE ACCESS
    Intelligent Integrated Circuits and Systems for 5G/6G Telecommunications
    Johannes Wynand Lambrechts, Saurabh Sinha, Kaushik Sengupta, and 14 more authors
    IEEE Access, 2024
    DOI
  2. TMTT.jpg
    A 36–91 GHz Broadband Beamforming Transmitter Architecture With Phase Error Between 1.2°–2.8° for Joint Communication and Sensing
    Zheng Liu, Emir Ali Karahan, and Kaushik Sengupta
    IEEE Transactions on Microwave Theory and Techniques, 2024
    DOI

2023

  1. JSSC.png
    Deep-Learning-Based Inverse-Designed Millimeter-Wave Passives and Power Amplifiers
    Emir Ali Karahan, Zheng Liu, and Kaushik Sengupta
    IEEE Journal of Solid-State Circuits, 2023
    DOI
  2. Electronics
    Low-cost W-band dual-mode SIW bandpass filters using commercially available printed-circuit-board technology
    Xiaolong Huang, and Zheng Liu
    Electronics, 2023
  3. IEEE ACCESS
    Stacked Common-Base vs Common-Emitter mmWave PA Cells and 68–105 GHz Broadband Asymmetrical PA in 250nm InP HBT
    Zheng Liu, Tushar Sharma, and Kaushik Sengupta
    IEEE Access, 2023
    DOI

2022

  1. MWCL.jpg
    Deep Learning-Enabled Inverse Design of 30–94 GHz Psat,3dB SiGe PA Supporting Concurrent Multiband Operation at Multi-Gb/s
    Zheng Liu, Emir Ali Karahan, and Kaushik Sengupta
    IEEE Microwave and Wireless Components Letters, 2022
    Best Paper Award DOI
  2. JSSC.png
    A 44–64-GHz mmWave Broadband Linear Doherty PA in Silicon With Quadrature Hybrid Combiner and Non-Foster Impedance Tuner
    Zheng Liu, and Kaushik Sengupta
    IEEE Journal of Solid-State Circuits, 2022
    DOI
  3. MWCL.jpg
    A Compact SiGe Stacked Common-Base Dual-Band PA With 20/18.8 dBm Psat at 36/64 GHz Supporting Concurrent Modulation
    Zheng Liu, Emir Ali Karahan, and Kaushik Sengupta
    IEEE Microwave and Wireless Components Letters, 2022
    DOI

2021

  1. IMS.jpg
    80–110-GHz Broadband Linear PA With 33% Peak PAE and Comparison of Stacked Common Base and Common Emitter PA in InP
    Zheng Liu, Tushar Sharma, and Kaushik Sengupta
    IEEE Microwave and Wireless Components Letters, 2021
    Best Student Paper Award DOI
  2. TMTT.jpg
    A 42–62 GHz Transformer-Based Broadband mm-Wave InP PA With Second-Harmonic Waveform Engineering and Enhanced Linearity
    Zheng Liu, Tushar Sharma, Chandrakanth Reddy Chappidi, and 3 more authors
    IEEE Transactions on Microwave Theory and Techniques, 2021
    DOI
  3. MWCL.jpg
    A 44 To 64 GHz Broadband 90° Hybrid Doherty PA With Quasi Non-Foster Tuner in 0.13 μm SiGe
    Zheng Liu, Yiming Yu, and Kaushik Sengupta
    IEEE Microwave and Wireless Components Letters, 2021
    Best Student Paper Award DOI

Conference Papers

2025

  1. ISSCC.jpg
    25.3 AI-Enabled Design Space Discovery and End-to-end Synthesis for RFICs with Reinforcement Learning and Inverse Methods Demonstrating mm-Wave/sub-THz PAs between 30 and 120GHz
    Jonathan Zhou, Emir Ali Karahan, Zheng Liu, and 1 more author
    In 2025 IEEE International Solid-State Circuits Conference (ISSCC), 2025

2024

  1. IMS.jpg
    Deep Learning Enabled Generalized Synthesis of Multi-Port Electromagnetic Structures and Circuits for mmWave Power Amplifiers
    Emir Ali Karahan, Zheng Liu, and Kaushik Sengupta
    In 2024 IEEE/MTT-S International Microwave Symposium - IMS 2024, 2024
    DOI
  2. ISSCC.jpg
    12.2 A mm-Wave/Sub-THz Synthesizer-Free Coherent Receiver with Phase Reconstruction Through Mixed-Signal Kramer-Kronig Processing
    Sherif Ghozzy, Muhamed Allam, Emir Ali Karahan, and 2 more authors
    In 2024 IEEE International Solid-State Circuits Conference (ISSCC), 2024
    DOI
  3. MWSCAS
    Deep Learning Enabled Design of RF/mmWave IC and Antennas
    Emir Ali Karahan, Jonathan Zhou, Zheng Liu, and 3 more authors
    In 2024 IEEE 67th International Midwest Symposium on Circuits and Systems (MWSCAS), 2024
    DOI
  4. IMS.jpg
    A Millimeter-Wave Low-Loss On-Chip Filter Design Using a Wideband Synthesis Method in 90-nm SiGe BiCMOS Process
    Xiaolong Huang, Zheng Liu, Emir Ali Karahan, and 1 more author
    In 2024 IEEE/MTT-S International Microwave Symposium - IMS 2024, 2024
    DOI

2023

  1. IMS.jpg
    A 30-88 GHz Phase Shifter with Broadband 90° Hybrid- Marchand Balun Network and Common-base Buffer Achieving 1.34-3.1° RMS Phase Error in 90 nm SiGe
    Zheng Liu, Emir Ali Karahan, and Kaushik Sengupta
    In 2023 IEEE/MTT-S International Microwave Symposium - IMS 2023, 2023
    DOI
  2. ESSCIRC.png
    Ultra Broadband Phased-Array Transmitter with Low Phase Error of 1.24-2.8° across 36-91 GHz Supporting 10.8 Gbps 64QAM in 90 nm SiGe
    Zheng Liu, Emir Ali Karahan, and Kaushik Sengupta
    In ESSCIRC 2023- IEEE 49th European Solid State Circuits Conference (ESSCIRC), 2023
    DOI

2022

  1. EuMIC
    A 30–97 GHz P sat3 db broadband pa with 18.5–21.5 dbm P sat and 18–26% PAE in 90 nm SiGe supporting concurrent multi-band operation
    Zheng Liu, Emir Ali Karahan, and Kaushik Sengupta
    In Proc. 17th Eur. Microw. Integr. Circuits Conf.(EuMIC), 2022
  2. RFIT
    Deep Learning enabled mmWave PA and Antenna Design
    Kaushik Sengupta, Emir Ali Karahan, and Zheng Liu
    In 2022 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT), 2022
    DOI

2020

  1. IMS.jpg
    Load Modulated Balanced mm-Wave CMOS PA with Integrated Linearity Enhancement for 5G applications
    Chandrakanth R Chappidi, Tushar Sharma, Zheng Liu, and 1 more author
    In 2020 IEEE/MTT-S International Microwave Symposium (IMS), 2020
    Best Student Paper Award DOI
  2. IMS.jpg
    Broadband PA Architectures with Asymmetrical Combining and Stacked PA cells across 50-70 GHz and 64-110 GHz in 250 nm InP
    Tushar Sharma, Zheng Liu, Chandrakanth R. Chappidi, and 3 more authors
    In 2020 IEEE/MTT-S International Microwave Symposium (IMS), 2020
    DOI
  3. IMS.jpg
    Transformer-based Broadband mm-Wave InP PA across 42-62 GHz with Enhanced Linearity and Second Harmonic Engineering
    Zheng Liu, Tushar Sharma, Chandrakanth R. Chappidi, and 2 more authors
    In 2020 IEEE/MTT-S International Microwave Symposium (IMS), 2020
    DOI
  4. APMC
    High Efficiency, Extended Back-off Range Doherty Power Amplifier Using A Three Port Harmonic Injection Network
    Xin Yu Zhou, Wing Shing Chan, Tushar Sharma, and 4 more authors
    In 2020 IEEE Asia-Pacific Microwave Conference (APMC), 2020
    DOI
  5. IWS
    Bandwidth Enhanced Doherty Power Amplifier Based on Coupled Phase Compensation Network With Specific Optimal Impedance
    Xin Yu Zhou, Wing Shing Chan, Wen Jie Feng, and 3 more authors
    In 2020 IEEE MTT-S International Wireless Symposium (IWS), 2020
    DOI
  6. Cleo.jpg
    Silicon photonic weights for microwave photonic canceller
    Eric C Blow, Chaoran Huang, Zheng Liu, and 2 more authors
    In CLEO: Science and Innovations, 2020

2019

  1. WCECS
    Balun Modeling for Differential Amplifiers
    Kun Chen, Zheng Liu, Xuelin Hong, and 2 more authors
    In , 2019

Patents

2025

  1. Liu, Z., & Sengupta, K. (2025). Broadband and multi-band planar antenna array architectures (Patent) [Patent]. Google Patents. https://patents.google.com/patent/US20250183534A1/en [Google Patents]
  2. Liu, Z., & Akhtar, S. (2025). Compact tunable hybrid coupler.
  3. Akhtar, S., Ghozzy, S., Miaad, A., & Liu, Z. (2025). Joint Radiometer and Depth Profiler.
  4. Liu, Z., Miaad, A., & Akhtar, S. (2025). Adaptive Doherty power amplifier system.

2024

  1. Sharma, T., Chappidi, C., Liu, Z., & Sengupta, K. (2024). Load modulated balanced power amplifier integrated circuits including transformer-based hybrid splitter/combiner circuits (Patent) [Patent]. Google Patents. https://patents.google.com/patent/US11949390B2/en [Google Patents]
  2. Liu, Z., & Akhtar, S. (2024). Broadband power amplifier combiner.
  3. Karahan, E., Liu, Z., Zhou, J., & Sengupta, K. (2024). A Deep Learning Enabled Generalized Synthesis of Multi-Port Electromagnetic Structures and Circuits for Radio-Frequency Systems.

2023

  1. Liu, Z., Karahan, E. A., & Sengupta, K. (2023). Deep learning-enabled inverse design of mm-wave impedance matching circuits and power amplifiers (Patent) [Patent]. Google Patents. https://patents.google.com/patent/US20230169241A1/en [Google Patents]