Wenhao Liu

Wenhao Liu

Master’s student

Wenhao Liu – Wireless & Underwater Sensing

🎓 Master’s Student in Electronic Science & Technology
📍 Northwest University (NWU), Xi’an, China
📧 wenhaoliu0805@gmail.com

About Me

I am a Master’s student in Electronic Science & Technology at Northwest University (NWU), advised by Prof. Xiaojiang Chen, Dean of the School of Information Science & Technology.

My research focuses on ultrasonic metasurface systems, in-body ultrasonic communication and powering, and wireless intelligent sensing, aiming to advance energy-efficient, reconfigurable, and high-fidelity acoustic interfaces across physical and biological domains.

I aim to extend these principles toward ultrasound-driven wearable, robotic, and sensing systems, creating intelligent systems that integrate in-body communication, oceanic perception, and adaptive control for sustainable operation across biological and environmental settings.

🔬 Research Interests

  • 🔊 Ultrasound & Acoustic Systems — Reconfigurable acoustic communication, metasurfaces, and piezoelectric transduction
  • 🩺 Wearable & Bio-Integrated Devices — Conformal, self-powered sensors and body-coupled communication interfaces
  • 🤖 Robotic & Intelligent Systems — Ultrasonic microrobots, soft robotic actuation, and autonomous manipulation
  • 👁️ Wireless & Intelligent Sensing — Low-power, adaptive sensing architectures for embedded and underwater environments

Patents & Publications

  • Patent: Dynamically Tunable Broadband Acoustic Metasurface (Filed 2024)
  • Patent: Acoustic-Based Multi-User Respiration Monitoring (Filed 2024)
  • Paper: MetaScatter: Enabling High-Order Underwater Backscatter via Piezoelectric Metasurface (Under Review at ACM MobiCom 2026)

Research Experience

MetaScatter: Enabling High-Order Underwater Backscatter
Irdeto IoT & Info-Sec Joint Lab, 2023 – 2025

MetaScatter Prototype
  • Designed the first μW-level, μs-scale reconfigurable underwater metasurface, achieving 16-QAM backscatter and passive beamforming with 500% higher throughput.
  • Demonstrated ≈180° reflection phase contrast through electromechanical coupling of piezoelectric resonance.
  • Built a 14×14 programmable metasurface array with FPGA-based real-time codebook uploading, using nanowatt TMUX1134 switches.

CW-AcousLen: Configurable Wideband Acoustic Metasurface
Irdeto IoT & Info-Sec Joint Lab, 2023 – 2024

CW-AcousLen Prototype
  • Designed and implemented the control hardware system for the 16–24 kHz wideband metasurface, overcoming narrowband limitations.
  • Validated system performance for respiration monitoring, demonstrating real-time acoustic sensing capabilities.
  • Engineered a scalable FPGA-controlled solenoid valve system actuating 256 valves within 20 ms, highlighting hardware design contribution.

Passive Omnidirectional Ultrasound Communication System
Irdeto IoT & Info-Sec Joint Lab, 2025 – In Progress

Passive Ultrasound Prototype
  • Developing an omnidirectional piezoelectric array inspired by radar corner reflectors, targeting 2–3× wider angular coverage.
  • Implementing a passive resonant amplification circuit to bypass diode threshold limits, enabling μW-level ultrasonic energy harvesting.
  • Prototyping and testing in water-tank and tissue-mimicking environments.

Autonomous Agricultural UAV System
Zhongyuan-Petersburg Aviation College, 2021

  • Built a vision-guided UAV spraying system with OpenMV-based processing and dual-loop PID flight control.
  • Achieved ±10 cm precision in autonomous navigation and landing.
  • Awarded First Prize in the National Undergraduate Electronic Design Contest.

Teaching & Mentorship

  • Undergraduate Supervision: Currently mentoring 3 undergraduate students on the Passive Omnidirectional Ultrasound Communication System project, guiding them in circuit design, simulation, and prototype testing.
  • Experienced in team-based research projects, fostering hands-on collaboration between graduate and undergraduate researchers.

Honors & Awards

  • 🏅 National Scholarship (Top 0.2% Nationwide, 12/2022)
  • 🏅 National Encouragement Scholarship (Top 3% Nationwide, 11/2022)
  • 🏅 National First Prize, Undergraduate Electronic Design Contest (Top 1.72%, 12/2021)
  • 🏅 Provincial Merit Student Award (06/2022)
  • 🏅 Provincial Outstanding Graduate Award (06/2023)
  • 🏅 Provincial Second Prize, 13th Lanqiao Cup National Software & IT Talent Competition (Top 20%, 05/2022)
  • 🏅 President Scholarship, NWU (Top 0.25% of the school, 12/2022)

Skills

  • Programming: C/C++, Python, MATLAB, Verilog
  • Tools: COMSOL, Cadence (10-layer PCB design, high-speed & mixed-signal layout), Altium Designer, Vivado, Quartus, ADS, PSpice
  • Domains: Wireless sensing, FPGA hardware design, acoustic modeling, IoT systems

⭐️ “Advancing wireless and underwater sensing at the intersection of acoustics, electronics, and communication.”