A5040112060- Microwave Engineering and Waveguides
- Radio Frequency Integrated Circuit Design
- Advanced Antenna and Metasurface Technologies
- Energy Harvesting in Wireless Networks
- Wireless Power Transfer Systems
- Antenna Design and Analysis
- Electromagnetic Compatibility and Noise Suppression
- Metamaterials and Metasurfaces Applications
- Advanced Power Amplifier Design
- Full-Duplex Wireless Communications
- GaN-based semiconductor devices and materials
- Organic Light-Emitting Diodes Research
- Conducting polymers and applications
- Gyrotron and Vacuum Electronics Research
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Photonic and Optical Devices
- Organic Electronics and Photovoltaics
- Optical Network Technologies
- Millimeter-Wave Propagation and Modeling
- Advanced MIMO Systems Optimization
- Wound Healing and Treatments
- RNA and protein synthesis mechanisms
- RNA modifications and cancer
- Electromagnetic Simulation and Numerical Methods
Huzhou University
2021-2025
University of Electronic Science and Technology of China
2012-2025
Huazhong University of Science and Technology
2012-2024
First Affiliated Hospital of Jiangxi Medical College
2024
Nanchang University
2024
Forschungszentrum Jülich
2023-2024
Jülich Aachen Research Alliance
2023-2024
Tongji Hospital
2022
China Academy of Space Technology
2014-2022
Huzhou Central Hospital
2022
Superconducting metamaterial transmission lines implemented with lumped circuit elements can exhibit left-handed dispersion, where the group and phase velocity have opposite sign, in a frequency range relevant for superconducting artificial atoms. Forming such line into ring coupling it to qubits at different points around results multimode bus resonator compact footprint. Using flux-tunable qubits, we characterize theoretically model variation strength between two each of ring-resonator...
This paper presents a high-efficiency and integrated millimeter-wave rectenna, which aims to provide stable wireless power supply for small sensor networks in Internet of Things (IoT) environments. The antenna adopts slot-coupled feeding, with the feed line radiating patch located on opposite sides ground plane, it can effectively reduce interference between circuitry increase effective area. Two Schottky diode are symmetric parallel mounted rectifier, losses caused by junction resistance,...
High power microwave AlGaN-GaN high electron-mobility transistors (HEMTs) on free-standing GaN substrates are demonstrated for the first time. Measured gate leakage was -2.2 μA/mm at -20 V and -10 -45 bias. When operated a drain bias of 50 V, devices showed record continuous-wave output density 9.4 W/mm 10 GHz with an associated power-added efficiency 40%. Long-term stability device RF operation also examined. Under room conditions, driven 25 3-dB gain compression remained stable in 200 h,...
In this letter, a compact balanced-to-balanced filtering power divider (FPD) is presented. It composed of three half-wavelength resonators and short-stub-loaded resonator (SSLR). Due to the intrinsic resonance characteristic resonator, bandpass response dividing function for differential-mode signal are realized suppression common-mode also achieved. The SSLR utilized as an extra isolation achieve high between two output ports. A resister needed load on adjusting its loaded quality factor (Q...
In this letter, an efficient and compact tri-band rectifier with large frequency ratio is proposed, which adopts a novel low-cost direct current (dc)-pass filter structure in the design. Three rectifiers are combined together by using diode arrays frequency-selective topology without additional impedance matching networks. The dc-pass composed of microstrip line structures cascaded lumped components, can effectively suppress high-order harmonics at high- low-frequency points while reducing...
SnO2 has been confirmed to be a potential sensor many toxic volatile gases. We report here the synthesis of porous nanoflowers by in situ oxidization SnS and SnS2 precursors with similar morphologies. The as-synthesized products were characterized FESEM, XRD, TEM, UV-vis spectrometry, fluorescence spectrometry nitrogen adsorption–desorption technique. Configured as resistor-type chemical sensors, exhibited excellent sensitivity fast response/recovery times towards different gases including...
This letter describes efficient high-power rectifiers, using a cost-effective AlGaN/GaN Schottky barrier diode (SBD) with accurate extraction of large-signal parameters as the rectifying device. The thin-barrier (TB) recess-free GaN SBD exhibits low turn-on voltage 0.5 V, on-resistance 6.2 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$~\Omega $</tex-math> </inline-formula> , junction capacitance 0.28 pF,...
This letter proposes an integrated rectifying-mixer (IRM) circuit designed for simultaneous wireless information and power transfer (SWIPT) receiver architecture. The advantage of IRM is that it combines the functions rectifier mixer. When used in SWIPT receiver, can process simultaneously, greatly improving integration communication anti-interference capabilities. To validate design, subject to both 5.8-GHz high-power RF signal 5.68-GHz low-power local oscillator (LO) signal. measurements...
Abstract A new method using resistors and capacitors loaded frequency selective surface (FSS) to design thin broadband electromagnetic absorber is proposed. The effect of the lumped elements on absorptivity investigated through transmission-line equivalent circuit model. simulations show that this multiple components FSS (CLFSS) has double changeable abilities adjusting real imaginary parts its input impedance, which leads improvement absorber’s impedance matching condition enhancing...
This letter presents an efficient and compact ultrawideband (UWB) rectifier for wireless power transfer (WPT) energy harvesting (EH) systems. The utilizes the voltage-doubling topology, which can effectively compress load impedance facilitate broadband matching. input matching network (IMN) is achieved using L-type microstrip branch cascaded with a lumped inductor, counteract capacitive of diodes reduce circuit size. proposed was designed fabricated verification 14.3 <inline-formula...
A study on a miniature, low voltage, wide bandwidth, and high RF efficiency V-shaped microstrip meander-line slow-wave structure is carried out in this paper. The fabrication of very convenient by utilizing the 2-D micro-fabrication techniques. Radio-frequency characteristics including dispersion properties, interaction impedance S-parameters are analyzed. Based these results, nonlinear large signal performances traveling-wave tube calculated 3-D particle-in-cell code. This shows that...
A planar balanced crossover with bandpass response is proposed. This consists of a ring resonator and four half-wavelength resonators. It acts as third-order filter between two diagonal ports under differential-mode (DM) excitation exhibits isolation adjacent DM or arbitrary common-mode excitation. To demonstrate the design, working at 2.41 GHz fabricated measured. The measured results exhibit good agreement simulation results.
Highly ordered transparent TiO 2 macropore arrays were synthesized via a simple glass‐clamping method at room temperature. The as‐synthesized show high transmittance in the visible light region and can be used as photocatalysts for degradation of organic dyes.
In this letter, a modified predistortion linearizer model is proposed to enable wideband synthesis of phase function. Additional time delay based on an artificial left-handed transmission line introduced in the characterize frequency-dependent conversion function, which can be utilized for cancelation AM/PM distortion microwave power amplifiers. Based model, monolithic integrated circuit predistorter designed generate both positive gain and according input power, realize increasing as...
A new method for designing compact Wilkinson power dividers with three order harmonics suppression is presented. The quarter-wavelength transmission line in the traditional divider replaced by two pairs of parallel coupled lines one end connected series an open stub. With this structure, will be shorter and attenuation poles can added stopband. As a result, newly proposed structure carries functions impedance matching at operating frequency orders suppression. In study, example 1 GHz...
We report Al 0.30 Ga 0.70 N/GaN/Al 0.07 0.93 N double‐heterostructure high electron mobility transistors (DH HEMTs) with admirable DC characteristics fully surpassing those of the N/GaN single‐heterostructure (SH) HEMTs. The DH HEMTs feature a 1400‐nm graded x 1– ( = 0–0.06) buffer layer, 300‐nm back barrier and 70‐nm thick GaN channel layer. Due to improved cystal quality enhanced confinement carriers, presented have shown performance respect conventional SH HEMTs, including promoted from...
The design of an ultrawideband (UWB) power divider with harmonics suppression is presented. With the proposed approach, size quarter-wavelength transmission line can be reduced and high order suppressed. equations are deduced by theory. A prototype operated at UWB band designed fabricated. Experimental results show good performance design. In addition, a stop-band rejection level more than 20 dB from 17.3 to 24.5 GHz. © 2014 Wiley Periodicals, Inc. Int J RF Microwave CAE 25:299–304, 2015.
This paper presents the balanced-to-balanced Gysel filtering power divider with arbitrary division for first time. Based on multicoupled series-resonator bandpass prototype network, a detailed theory analysis is presented and corresponding design equations are concluded. Two dividers ratio of 2 3 realized using half-wavelength resonator short-stub-loaded resonator. Finally, two example circuits fabricated measured verification. The results show good agreement simulated confirm theory.
Abstract This article presents a filtering power divider (FPD) that realizes 2‐order bandpass response by only using 2 shorted‐stub loaded resonators (SSLRs). The structure of the proposed FPD is unsymmetrical but it achieves good output balance. isolation between ports also realized. detailed theoretical analysis suitable for with developed and discussion balance presented. An works at 2.39 GHz fabricated measured demonstration. A agreement obtained simulation measurement.