A5081925635- Microwave Engineering and Waveguides
- Neuroscience and Neural Engineering
- Radio Frequency Integrated Circuit Design
- Millimeter-Wave Propagation and Modeling
- Advanced Memory and Neural Computing
- 3D Printing in Biomedical Research
- Pluripotent Stem Cells Research
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Ferroelectric and Negative Capacitance Devices
- Gyrotron and Vacuum Electronics Research
- Machine Learning and ELM
- Semiconductor materials and devices
- Advanced Sensor and Energy Harvesting Materials
- Immunotherapy and Immune Responses
- Planarian Biology and Electrostimulation
- Psoriasis: Treatment and Pathogenesis
- Brain Tumor Detection and Classification
- Advanced Chemical Sensor Technologies
- Tissue Engineering and Regenerative Medicine
- Advanced Thermoelectric Materials and Devices
- Mesenchymal stem cell research
- EEG and Brain-Computer Interfaces
- Analog and Mixed-Signal Circuit Design
Stanford University
2016-2024
Nanjing University
2023
Peking University
2012-2013
Institute of Microelectronics
2012
Low-cost, energy efficient, high-capacity, scalable, and easy-to-deploy point-to-point wireless links at mm-waves find a variety of applications including data intensive systems (e.g., centers), interactive kiosks, many emerging requiring pipelines. Operating above 100GHz enables compact low-footprint system solutions that can multiplex Tb/s aggregate rates for dense deployments; therefore competing with wired solution in aspects rate efficiency, but much more flexible deployment. The focus...
Abstract Helically corrugated waveguides are valuable for constructing high-performance gyrotron devices and high-power pulse compressors. This paper establishes a theoretical model to analyze the dispersion characteristics of helically coaxial waveguides, where equations solving propagation constants coupled eigenmodes, as well detailed coupling coefficients various mode combinations provided. On this foundation, featuring single dual helical surfaces were systematically analyzed compared...
Human induced pluripotent stem cell-derived neural progenitor cells (hNPCs) are a promising cell source for transplantation to treat neurological diseases such as stroke and peripheral nerve injuries. However, there have been limited studies investigating how the dimensionality of physical electrical microenvironment affects hNPC function. In this study, we report fabrication two- three-dimensional (2D 3D respectively) constructs composed conductive polymer compare effect stimulation...
We investigate the fundamental physical constraints and tradeoffs in common millimeter-wave dielectric waveguides proposed for high speed links. consider with different geometries, dimensions operating frequencies, show that capacity of optimized longer links is limited by dispersion not necessarily loss. In our analysis, required distance determine choice waveguide frequency, which would then energy efficiency link. Our generic theoretical analyses are agreement measurements presented...
This letter presents a fully packaged 130-GHz QPSK transmitter (TX) with an on-package Vivaldi antenna for highdensity dielectric waveguide (DWG) chip-to-chip and board-to-board interconnects. The TX chip contains multiplier chain the local oscillator path, up-conversion mixers, two-stage power amplifier. For testing, also includes two 27 - 1 sequence-programmable high-speed pseudo-random bit generators, each capable of generating 18 Gb/s (limited by test equipment) at energy efficiency 0.7...
Electrical gradients are fundamental to physiological processes including cell migration, tissue formation, organ development, and response injury regeneration. Current electrical modulation of cells is primarily studied under a uniform field. Here we demonstrate the fabrication conductive gradient hydrogels (CGGs) that display mechanical properties varying local mimicking conditions. The electrically-stimulated CGGs enhanced human mesenchymal stem (hMSC) viability attachment. Cells on...
In this paper, we demonstrate a proof-of-concept 130 GHz wireless 2×2 line-of-sight (LoS) multi-input multi-output (MIMO) transceiver using fully packaged transmit and receive arrays scalable analog baseband processing. The link utilizes the Rayleigh criterion to independent streams over LoS channel. transmitter (TX) receiver (RX) chips are with integrated mm-wave antennas. two-element QPSK TX array consumes 432 mW, while entire four-channel MIMO RX 630 mW supports four concurrent channels...
Psoriasis is an autoimmune disease, which has a significant impact on the quality of patient's life. And, there still no cure for psoriasis. The human dental pulp stem cell (hDPSC) possesses properties immunoregulation. In this study, we aimed to determine effect hDPSC imiquimod (IMQ)-induced psoriasis in mice. model was established by topical application IMQ cream mice 7 days. We found that subcutaneous injection could reduce symptoms skin lesions IMQ-induced and suppress expression keratin...
Wireless passive sensors, being battery-free and simple, are suitable for disposable use across various applications, from tracking food monitoring the environment to clinical diagnostics. However, their utilization is hampered by complexity of existing readout techniques absence memory functionality within sensor. Here, we present a reader technique that can automatically lock sensor value wirelessly through inductive coupling, significantly reducing complexity. By integrating...
Suppressing the sneak current in crossbar array is a great challenge for high-density integration of RRAM. In this paper, novel threshold switching selector device with simple structure Pt/TaO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> /Pt proposed RRAM application. The measured data shows that exhibits good characteristics, such as tight cycle to distribution voltage, resistance uniformity and abrupt properties no hysteresis...
EEG recording has been widely used in a variety of applications, including sleep studies, mental health monitoring, brain–computer interfaces (BCIs), etc. However, mainstream clinical systems are still tethered with wet electrodes that require special preparation, limiting the setup to well-equipped labs and preventing collection longitudinal data. In this article, we summarize characteristics signals review key circuit design techniques signal acquisition data telemetry. With careful system...
Effective stroke recovery therapeutics remain limited. Stem cell therapies have yielded promising results, but the harsh ischemic environment of post-stroke brain reduces their therapeutic potential. Previously, we developed a conductive polymer scaffold system that enabled stem delivery with simultaneous electrical modulation cells and surrounding neural environment. This wired proved efficacious in optimizing ideal conditions for mediated motor improvements rodent model stroke. To further...
A novel programming method for multilevel resistive random access memory (RRAM) is proposed and experimentally demonstrated to improve the stability of high resistance states (HRS). By substituting a relatively long reset pulse with series short pulses, this effectively reduces variation resulted from Joule heating. The standard deviation one HRS greatly reduced. Though on our TiN/TaO X /Pt devices, further analysis indicates its possible validity in bipolar RRAM devices based other...