A5103273108- Radio Frequency Integrated Circuit Design
- Microwave Engineering and Waveguides
- Advanced Sensor and Energy Harvesting Materials
- Advanced Power Amplifier Design
- Superconducting and THz Device Technology
- Conducting polymers and applications
- Tactile and Sensory Interactions
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Full-Duplex Wireless Communications
- Remote Sensing and LiDAR Applications
- Energy Harvesting in Wireless Networks
- Magneto-Optical Properties and Applications
- Analog and Mixed-Signal Circuit Design
- Metamaterials and Metasurfaces Applications
- Advancements in PLL and VCO Technologies
- Photonic and Optical Devices
- Digital Filter Design and Implementation
- Muscle activation and electromyography studies
- HVDC Systems and Fault Protection
- Advanced MEMS and NEMS Technologies
- Photonic Crystals and Applications
- Wireless Power Transfer Systems
- Solar-Powered Water Purification Methods
- Electromagnetic wave absorption materials
University of Michigan
2022-2025
City University of Hong Kong
2025
Sun Yat-sen University
2024-2025
Beihang University
2024
Tsinghua University
2017-2022
Beijing University of Chemical Technology
2021
Institute of Electronics
2019-2020
Institute of Physics
2018
Wuhan Ship Development & Design Institute
2017
Due to its excellent flexibility, graphene has an important application prospect in epidermal electronic sensors. However, there are drawbacks current devices, such as sensitivity, range, lamination, and artistry. In this work, we have demonstrated a multilayer skin based on laser scribing graphene, whose patterns programmable. A process been developed remove the unreduced oxide. This method makes not only transferable butterflies, human bodies, any other objects inseparably elegantly,...
Most mute people cannot speak due to their vocal cord lesion. Herein, assist "speak", we proposed a wearable skinlike ultrasensitive artificial graphene throat (WAGT) that integrated both sound/motion detection and sound emission in single device. In this work, the growth patterning of can be realized at same time, thin poly(vinyl alcohol) film with laser-scribed was obtained by water-assisted transferring process. virtue low-resistant substrate, WAGT has high sensitivity (relative...
Textiles are materials that extensively used in everyday life; textile-based sensors can, therefore, be regarded as ideal devices for a health monitor. However, previously reported textile have limited prospects due to their single function or incompatibility. Traditional generally focus on signal detection, which has not been able combined with an actuator provide real-time status feedback. Thus, date, there no well-established monitoring systems based intelligent textiles. Herein, we...
Current wearable sensors are fabricated with substrates, which limits the comfort, flexibility, stretchability, and induces interface mismatch. In addition, substrate prevents evaporation of sweat is harmful to skin health. this work, we have enabled substrate-free laser scribed graphene (SFG) electronic (e-skin) multifunctions. Compared e-skin substrate, SFG has good gas permeability, low impedance, flexibility. Only assisted using water, can be transferred almost any objects including...
In this article, a high-efficiency broadband millimeter-wave (mm-Wave) integrated power amplifier (PA) with low-loss slotline-based combing technique is proposed. The proposed combiner consists of grounded coplanar waveguide (GCPW)-to-slotline transitions and folded slots to simultaneously achieve combining impedance matching. This provides parallel–series method enhance the output PAs at mm-Wave frequencies while maintaining compact area high efficiency. As proof concept, four-to-one hybrid...
This article presents a broadband THz power amplifier (PA) operating close to the maximum oscillation frequency ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">f</i> <sub xmlns:xlink="http://www.w3.org/1999/xlink">max</sub> ) with proposed combining and stagger-tuned gain boosting techniques. A compact combiner based on compensated three-conductor transmission line (T-line) balun is simultaneously achieve matching combining. 4-stage closely...
Stretchability and flexibility are essential characteristics for high-performance electromagnetic interference (EMI) shielding materials in wearable smart devices. However, achieving these mechanical properties while also maintaining high EMI effectiveness (SE) remains a significant challenge. Here, stretchable patterned carbon nanotube (CNT) array composite film, reinforced with two-dimensional (2D) nanomaterials (Ti3C2Tx graphene), is fabricated using straightforward scraping method. The...
Abstract With the rapid development of electronic detective techniques, there is an urgent need for broadband (from microwave to infrared) stealth aerospace equipment. However, achieving effective primarily relies on composite multi-layer coatings different materials, while realizing with a single material remains significant challenge. Herein, we reported highly compact MXene film aligned nanosheets through continuous centrifugal spraying strategy. The exhibits exceptional electromagnetic...
A novel highly linear magnetless isolator based on weakly coupled nonreciprocal metamaterials is proposed in this article. Nonreciprocal devices, such as isolators and circulators, are widely used modern microwave, optics. Nowadays, nonreciprocity exclusively achieved with anisotropic magneto-optic material. Unfortunately, material needs permanent magnetic bias typically bulky, which remains incompatible technology for integrated circuit. In article, we reveal that strong isolation can be...
This paper presents a D-band frequency sextupler in 22 nm FD-SOI CMOS. It consists of differential tripler followed by push-push doubler for six times multiplication, and several amplifiers enhanced conversion gain output power. A broadband balance-compensation method is proposed transformer-based baluns to realize wideband between single-ended balanced signals. The measured peak power efficiency are 5.1 dBm 8.49% at 145.5 GHz, respectively. fabricated features 3-dB bandwidth from 127 162...
This paper presents the analysis and design of broadband balance-compensated transformer baluns, suitable for silicon-based millimeter-wave (mm-wave) circuits requiring high-quality balanced-unbalanced conversion. By introducing a mode-dependent lumped-element model, general center-tap-based balance-compensation method is proposed with two practical compensation techniques derived. Several critical issues regarding baluns are also discussed, including parasitic effects in balance...
Being able to assess the amount of uncertainty locally associated dense point clouds generated by measurement can help investigate relations between metrological performance a chosen measuring technology, and local geometric surface properties measurand geometry. In previous research it was demonstrated that spatial statistics based on Gaussian Random Fields repeats could be used obtain maps capturing both dispersion bias position points within measured clouds. However, method had...
Nonreciprocal components such as circulators, isolators, and gyrators play vital roles in modern communication systems. However, all of them are limited to 0.1 terahertz (THz) due their poor performances terms linearity, loss, noise at high frequency, making not amenable for the potential sub-THz/THz operation. In this letter, a 210-GHz nonreciprocal isolator based on resistor-free unidirectional ring resonators is implemented 130-nm SiGe BiCMOS process ( f <sub...
Abstract In this paper we propose a new design for an ultra-wideband microwave metamaterial absorber. This absorber has sandwich structure, and the top metal pattern is periodically arranged on copper background. combined with Fe–Co composites metamaterials, which solves narrow-band problem of absorption. We realize absorptivity more than 90% in 2.16–18 GHz frequency band normal incidence. The thickness structure 0.61 mm (about 1/48.8 wavelength at central frequency). performance proposed...
In this paper, a compact sub-terahertz low loss power combiner is proposed to realize optimal output matching and combining, simultaneously. With the technique, 160 GHz 4-way amplifier (PA) in 130-nm SiGe BiCMOS technology achieved, which exhibits maximum gain of 24 dB 3-dB bandwidth 20 GHz. Moreover, PA achieves saturated 18 dBm power-added efficiency (PAE) 9.4% at GHz, where pads, input feed lines are all included. To best our knowledge, it highest among previously reported PAs above 150...
In this article, a highly efficient terahertz (THz) beam-steerable integrated radiator based on tunable boundary conditions is presented. The seen by the central slot are tuned switched slots, and corresponding radiation patterns can be altered. This technique enables THz antenna with high efficiency. addition, DC-THz efficiency of harmonic voltage-control oscillator (VCO) boosted through 2-D boosting technique. Based two techniques above, has been implemented in 130-nm SiGe BiCMOS process...
A positive feedback gain-enhanced technique for power amplifiers has been introduced in this Letter. With the proposed circuit design method optimal inductive feedback, a 180 GHz high-gain single-stage cascode amplifier 130 nm SiGe process is implemented. The measurement results show gain of 10 dB and 20 bandwidth with 110 mW dc are achieved, 6.5 dBm output referred to P1dB 3.5% collector efficiency attained. chip area only 0.50 × 0.48 mm2.
<h2>Summary</h2> Recent advancements in flexible strain sensors utilizing nanomaterials and advanced carbon materials have showcased remarkable sensitivity, promising vast application potential. However, achieving a superior gauge factor (GF) with exceptional outstanding stability at controllable range is still critical challenge. We introduce the "soft break mechanism," which enables reversible resistance switching through graphene interlayer displacement rGO laminate (CPLs) distance...