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Biography

Zheng Liu holds a B.S. in Electronics from Peking University, Beijing, China, an M.S. from UCLA, and a Ph.D. in Electrical and Computer Engineering from Princeton University. From 2015 to 2018, he served as a Senior Design Engineer at Skyworks Solutions Inc., California, where he played a pivotal role in RF power amplifier and front-end module design, contributing to the successful shipment of over 40 million units worldwide. He also worked with Apple on mmWave beamformer design and is currently a researcher at Kilby Research Labs, Texas Instruments, focusing on GaN power amplifier modules and mmWave highly stable clock systems.

Dr. Liu’s research expertise includes mm-wave and sub-THz transmiters/power amplifiers, wideband phased array systems, and AI enabled RFIC design methodology. His contributions to the MTT-S field have been recognized with several prestigious awards, including the Bede Liu Best Ph.D. Dissertation Award from Princeton University in 2023, the Advanced Practice Paper Award (First Author) at IEEE IMS 2022, the MTT-S Graduate Fellowship in 2021, and the Analog Devices Outstanding Student Designer Award in 2021. Additionally, he has received three IEEE IMS Best Student Paper Awards, including two as first author in IMS 2021 and one as co-author in IMS 2020.

Dr. Liu is an affiliate member of the MTT-S Technical Committee on Microwave and mmWave Integrated Circuits (TC-14) and actively serves as a reviewer for leading journals such as IEEE JSSC, TMTT, MWTL, and TCAS-I.

Activities

Employment (3)

Texas Instruments (United States): Dallas, US

2023-10-02 to present | Analog (RF/mmWave IC research) Design Engineer (Kilby Labs)
Employment
Source: Self-asserted source
Zheng Liu

Apple: San Diego, CA, US

2022-05-16 to 2022-08-05 | mmWave IC design
Employment
Source: Self-asserted source
Zheng Liu

Skyworks Solutions (United States): Newbury Park, California, US

2015-05-01 to 2018-11-30 | Senior Electrical Engineer (Advanced Mobile Solution)
Employment
Source: Self-asserted source
Zheng Liu

Education and qualifications (3)

Princeton University: Princeton, NJ, US

2019-02-01 to 2023-05-12 | Ph.D (Electrical and Computer Engineering)
Education
Source: Self-asserted source
Zheng Liu

University of California, Los Angeles: Los Angeles, US

2013-09-05 to 2015-06-12 | M.S (Electrical Engineering)
Education
Source: Self-asserted source
Zheng Liu

Peking University: Beijing, CN

2009-09-05 to 2013-07-13 | B.S (Electronics)
Education
Source: Self-asserted source
Zheng Liu

Professional activities (2)

IEEE Microwave Theory & Technology Society (MTT-S): Piscataway, US

Technical Committee (TC14-Microwave and mmWave Integrated Circuits subcommittee)
Membership
Source: Self-asserted source
Zheng Liu

2025 IEEE International Microwave Symposim: San Francisco, US

Technical Program Committee
Membership
Source: Self-asserted source
Zheng Liu

Works (26)

Synthesized Design of Millimeter-Wave Low-Loss Wideband Bandpass Filter and Filtering Impedance Transformer in 90-nm (Bi)-CMOS Technology

IEEE Journal of Microwaves
2025 | Journal article
Contributors: Xiaolong Huang; Zheng Liu; Emir Ali Karahan; Kaushik Sengupta
Source: check_circle
Crossref

Intelligent Integrated Circuits and Systems for 5G/6G Telecommunications

IEEE Access
2024 | Journal article
Contributors: Johannes Wynand Lambrechts; Saurabh Sinha; Kaushik Sengupta; Abadahigwa Bimana; Suvarna Kadam; Sheetal Bhandari; Jaco Du Preez; Zijian Shao; Xiaolong Huang; Zheng Liu et al.
Source: check_circle
Crossref

Deep Learning Enabled Design of RF/mmWave IC and Antennas

2024 IEEE 67th International Midwest Symposium on Circuits and Systems (MWSCAS)
2024-08-11 | Conference paper
Contributors: Emir Ali Karahan; Jonathan Zhou; Zheng Liu; Zijian Shao; Sebastian Fisher; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu

A Millimeter-Wave Low-Loss On-Chip Filter Design Using a Wideband Synthesis Method in 90-nm SiGe BiCMOS Process

2024 IEEE/MTT-S International Microwave Symposium - IMS 2024
2024-06-16 | Conference paper
Contributors: Xiaolong Huang; Zheng Liu; Emir Ali Karahan; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu

IMS Deep Learning Enabled Generalized Synthesis of Multi-Port Electromagnetic Structures and Circuits for mmWave Power Amplifiers

2024 IEEE/MTT-S International Microwave Symposium - IMS 2024
2024-06-16 | Conference paper
Contributors: Emir Ali Karahan; Zheng Liu; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu

12.2 A mm-Wave/Sub-THz Synthesizer-Free Coherent Receiver with Phase Reconstruction Through Mixed-Signal Kramer-Kronig Processing

2024 IEEE International Solid-State Circuits Conference (ISSCC)
2024-02-18 | Conference paper
Contributors: Sherif Ghozzy; Muhamed Allam; Emir Ali Karahan; Zheng Liu; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu

A 36–91 GHz Broadband Beamforming Transmitter Architecture With Phase Error Between 1.2°–2.8° for Joint Communication and Sensing

IEEE Transactions on Microwave Theory and Techniques
2024-01 | Journal article
Contributors: Zheng Liu; Emir Ali Karahan; Kaushik Sengupta
Source: check_circle
Crossref

Deep-Learning-Based Inverse-Designed Millimeter-Wave Passives and Power Amplifiers

IEEE Journal of Solid-State Circuits
2023 | Journal article
Contributors: Emir Ali Karahan; Zheng Liu; Kaushik Sengupta
Source: check_circle
Crossref

Stacked Common-Base vs Common-Emitter mmWave PA Cells and 68–105 GHz Broadband Asymmetrical PA in 250nm InP HBT

IEEE Access
2023 | Journal article
Contributors: Zheng Liu; Tushar Sharma; Kaushik Sengupta
Source: check_circle
Crossref

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

ESSCIRC 2023- IEEE 49th European Solid State Circuits Conference (ESSCIRC)
2023-09-11 | Conference paper
Contributors: Zheng Liu; Emir Ali Karahan; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu

Low-Cost W-Band Dual-Mode SIW Bandpass Filters Using Commercially Available Printed-Circuit-Board Technology

Electronics
2023-08-27 | Journal article
Contributors: Xiaolong Huang; Zheng Liu
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

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

2023 IEEE/MTT-S International Microwave Symposium - IMS 2023
2023-06-11 | Conference paper
Contributors: Zheng Liu; Emir Ali Karahan; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu

A 30–97 GHz $\mathbf{P}_{\text{sat},3\text{dB}}$ Broadband PA with 18.5-21.5dBm $\mathbf{P}_{\text{sat}}$ and 18-26% PAE in 90nm SiGe Supporting Concurrent Multi-Band Operation

2022 17th European Microwave Integrated Circuits Conference (EuMIC)
2022-09-26 | Conference paper
Contributors: Zheng Liu; Emir Ali Karahan; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu

A 44–64-GHz mmWave Broadband Linear Doherty PA in Silicon With Quadrature Hybrid Combiner and Non-Foster Impedance Tuner

IEEE Journal of Solid-State Circuits
2022-08 | Journal article
Contributors: Zheng Liu; Kaushik Sengupta
Source: check_circle
Crossref

Deep Learning enabled mmWave PA and Antenna Design

2022 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)
2022-08-29 | Conference paper
Contributors: Kaushik Sengupta; Emir Ali Karahan; Zheng Liu
Source: Self-asserted source
Zheng Liu

A Compact SiGe Stacked Common-Base Dual-Band PA With 20/18.8 dBm P sat at 36/64 GHz Supporting Concurrent Modulation

IEEE Microwave and Wireless Components Letters
2022-06 | Journal article
Contributors: Zheng Liu; Emir Ali Karahan; Kaushik Sengupta
Source: check_circle
Crossref

Deep Learning-Enabled Inverse Design of 30–94 GHz Psat,3dB SiGe PA Supporting Concurrent Multiband Operation at Multi-Gb/s

IEEE Microwave and Wireless Components Letters
2022-06 | Journal article
Contributors: Zheng Liu; Emir Ali Karahan; Kaushik Sengupta
Source: check_circle
Crossref

80–110-GHz Broadband Linear PA With 33% Peak PAE and Comparison of Stacked Common Base and Common Emitter PA in InP

IEEE Microwave and Wireless Components Letters
2021-06 | Journal article
Contributors: Zheng Liu; Tushar Sharma; Kaushik Sengupta
Source: check_circle
Crossref

A 44 To 64 GHz Broadband 90° Hybrid Doherty PA With Quasi Non-Foster Tuner in 0.13 μm SiGe

IEEE Microwave and Wireless Components Letters
2021-06 | Journal article
Contributors: Zheng Liu; Yiming Yu; Kaushik Sengupta
Source: check_circle
Crossref

A 42–62 GHz Transformer-Based Broadband mm-Wave InP PA With Second-Harmonic Waveform Engineering and Enhanced Linearity

IEEE Transactions on Microwave Theory and Techniques
2021-01 | Journal article
Contributors: Zheng Liu; Tushar Sharma; Chandrakanth Reddy Chappidi; Suresh Venkatesh; Yiming Yu; Kaushik Sengupta
Source: check_circle
Crossref

Silicon Photonic Weights for Microwave Photonic Canceller

Conference on Lasers and Electro-Optics
2020 | Conference paper
Contributors: Eric C. Blow; Chaoran Huang; Zheng Liu; Samuel J. Markoff; Paul R. Prucnal
Source: Self-asserted source
Zheng Liu via Crossref Metadata Search

High Efficiency, Extended Back-off Range Doherty Power Amplifier Using A Three Port Harmonic Injection Network

2020 IEEE Asia-Pacific Microwave Conference (APMC)
2020-12-08 | Conference paper
Contributors: Xin Yu Zhou; Wing Shing Chan; Tushar Sharma; Jing Xia; Zheng Liu; Shichang Chen; Wenjie Feng
Source: Self-asserted source
Zheng Liu

Bandwidth Enhanced Doherty Power Amplifier Based on Coupled Phase Compensation Network With Specific Optimal Impedance

2020 IEEE MTT-S International Wireless Symposium (IWS)
2020-09-20 | Conference paper
Contributors: Xin Yu Zhou; Wing Shing Chan; Wen Jie Feng; Xiao Hu Fang; Tushar Sharmar; Zheng Liu
Source: Self-asserted source
Zheng Liu

Broadband PA Architectures with Asymmetrical Combining and Stacked PA cells across 50-70 GHz and 64-110 GHz in 250 nm InP

2020 IEEE/MTT-S International Microwave Symposium (IMS)
2020-08 | Conference paper
Contributors: Tushar Sharma; Zheng Liu; Chandrakanth R. Chappidi; Hooman Saeidi; Suresh Venkatesh; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu

Load Modulated Balanced mm-Wave CMOS PA with Integrated Linearity Enhancement for 5G applications

2020 IEEE/MTT-S International Microwave Symposium (IMS)
2020-08 | Conference paper
Contributors: Chandrakanth R Chappidi; Tushar Sharma; Zheng Liu; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu

Transformer-based Broadband mm-Wave InP PA across 42-62 GHz with Enhanced Linearity and Second Harmonic Engineering

2020 IEEE/MTT-S International Microwave Symposium (IMS)
2020-08 | Conference paper
Contributors: Zheng Liu; Tushar Sharma; Chandrakanth R. Chappidi; Suresh Venkatesh; Kaushik Sengupta
Source: Self-asserted source
Zheng Liu via Crossref Metadata Search