A5030184790- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Photonic and Optical Devices
- Radio Frequency Integrated Circuit Design
- Acoustic Wave Resonator Technologies
- Electromagnetic Simulation and Numerical Methods
- Gyrotron and Vacuum Electronics Research
- Millimeter-Wave Propagation and Modeling
- Electric Motor Design and Analysis
- Electromagnetic Compatibility and Noise Suppression
- Magnetic Bearings and Levitation Dynamics
- Mechanical and Optical Resonators
- Microwave and Dielectric Measurement Techniques
- Transition Metal Oxide Nanomaterials
- Advanced Clustering Algorithms Research
- Advanced Image and Video Retrieval Techniques
- Advanced Wireless Communication Techniques
- Sensorless Control of Electric Motors
- Full-Duplex Wireless Communications
- Thin-Film Transistor Technologies
- Genetic and Kidney Cyst Diseases
- Laser Material Processing Techniques
- Chemokine receptors and signaling
- Cystic Fibrosis Research Advances
University of Electronic Science and Technology of China
2008-2024
Harbin University of Science and Technology
2023
Nankai University
2022
Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital
2020
National Engineering Research Center of Electromagnetic Radiation Control Materials
2017-2019
System Equipment (China)
2019
State Key Laboratory of Electronic Thin Films and Integrated Devices
2017
Tsinghua University
2016
Substrate integrated waveguide (SIW) bandpass filters in box-like topology based on combining single- and dual-mode cavities are presented. Two coupled TE101-mode-based to one square-shaped (modes TE102 TE201) cavity realize the coupling scheme which bypass direct couplings can provide diagonal cross-coupling path. Based characteristics of SIW multiple energy flow paths, superior design flexibility terms TZ positioning has been realized demonstrated. Finally, two asymmetrical response with...
A novel waveguide step‐twist integrated with a bandpass filter is presented in this Letter. The twist composed of four equally rotated cavities to achieve polarisation rotation and filtering functionalities simultaneously. Such can significant reduction size weight. design demonstrated at Ka‐band using technology fabricated stereolithography apparatus 3D printing together metal plating. device designed have centre frequency 32 GHz bandwidth 1 GHz. measured result shows good agreement...
A non‐degenerate dual‐mode resonator derived from circular substrate integrated waveguide is proposed, and two pseudoelliptic bandpass filters with non‐resonant mode based on the resonators are presented. Two resonant modes (higher order modes) employed to degenerate a passband, while (fundamental mode) designed provide direct input‐to‐output coupling. Owning an additional path provided by mode, have good selectivity very compact size. The presented simulation measurement results in agreement.
This article presents a Ka-band fourth-order slotted spherical resonator waveguide bandpass filter (BPF) with wide spurious suppression stopband. It uses the first higher-order TM211 mode rather than fundamental TM101 of in order to obtain higher unload quality factor (Q <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">u</sub> ) for smaller in-band insertion loss, as well larger volume that gives better tolerance fabrication errors high frequency...
Two novel substrate integrated waveguide (SIW) resonators under different boundaries are proposed and analyzed. The closed-form solutions of the guided-mode field formulas for calculating resonant frequencies SIW given. coexistence mechanism quasi-TEM (TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">00</sub> ) TE mode was illustrated by equivalent principle. modes each filter, TE100 (TEM mode)...
Thin-film piezoelectric-on-silicon acoustic wave resonators are promising for the development of system-on-chip integrated circuits with micro/nano-engineered timing reference. However, in order to realize their large potentials, a further enhancement quality factor (Q) is required. In this study, novel approach, based on multi-stage phononic crystal (PnC) structure, was proposed achieve an ultra-high Q. A systematical study revealed that PnC structure formed frequency-selective band-gap...
Abstract This letter presents compact waveguide variable bends incorporating integrated bandpass filters. Two designs have been demonstrated within X‐band (8.2–12.4 GHz) range, using three‐dimensional stereolithography printing and copper plating. The first design utilizes coupled elliptical resonators, while the second employs deformed ellipsoidal resonators. These provide both filtering functionality complex routing simultaneously, thereby leading to a reduction of total size loss....
Two bandpass filters (BPFs) are implemented on a single dual‐mode square‐shaped substrate‐integrated waveguide (SIW) cavity with two etched coplanar waveguides. The proposed BPFs can achieve transmission zeros (TZs) using dual modes in the SIW (i.e. TE 102 and 201 ) non‐resonating mode fundamental 101 ), which provides direct input‐to‐output coupling. Moreover, positions of TZs be tuned by changing input output ports. an extra TZ controllable position is also achieved electric magnetic mixed...
This study reports a multi‐layered dual‐mode substrate integrated waveguide (SIW) bandpass filter (BPF), in which the input and output ports are located on same layer (i.e. upper one). The SIW cavity lower is coupled to by two crossed slots, can independently control inter‐couplings. proposed be modelled dual‐extended doublet coupling scheme with considering bypass couplings between source load. Based structure, single‐ dual‐band filtering responses four controllable finite‐transmission...
The factors that lead to coronavirus disease 2019 (COVID-19) vaccine hesitancy among health-care workers (HCWs) are unclear. We aimed identify the influence HCWs' hesitancy, especially of their social network. Using an online platform, we surveyed HCWs in Chongqing, China, January 2021 understand COVID-19 HCWs. Proportional allocation stratified sampling method was used recruit respondents. Multivariable logistic regression and network analysis (SNA) were analyze factors. A total 5247...
This paper presents a Ku-band waveguide component integrated with bandpass filtering, twisting, and bending functionalities. The device is developed upon scheme of four cascaded distorted resonant cavities pair orthogonal input output waveguides in different orientations, resulting highly compact configuration significant reductions weight, size, insertion loss. In addition, by incorporating hybrid iris technique, an enhanced out-of-band response can be achieved. Owing to the geometry...
This paper presents a Ka-band twisted bandpass filter integrated with pair of orthogonally feed waveguides. It can achieve filtering and polarization rotation simultaneously. To validate the presented approach, 4 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> order operating at 34 GHz 2.9% fractional bandwidth is designed fabricated by stereolithography-based 3-D printing process. The RF-measured results demonstrate slight frequency...
A microwave gain equalizer (GE) with good tunability, high Q factor, and compact volume for Ku-band application based on dual-mode circular substrate integrated waveguide (SIW) resonators is proposed. The characteristics of two orthogonal coupled slots to excite the dual modes are presented, optimal position thin-film resistor tune attenuation has been investigated. resonant frequencies attenuations can be tuned independently, GE easily fit a required curve. For demonstration, designed...
A Ku-band (12–18 GHz) waveguide bandpass filter has been designed, fabricated using stereolithography (SLA) printing, measured, and presented. The is composed of five coupled TE101 resonators, where the external/internal couplings are implemented through rotation resonators. This novel structure superior to conventional filters based on irises, in terms reduced sensitivity fabrication inaccuracies (i.e., allowing larger tolerance process), as coupling strength depends mutual angle between...
In this paper, a double-band visible-infrared photodetector absorber is proposed, which consists of modified microbolometer and metallic reflective layer has deep well. The simulated results show that the proposed high absorption peaks both at visible band (400–800 nm) infrared (8–12 μm), absorptivity more than 85% while rate exceeds 70%. By analyzing simulation results, mechanism discussed. designed not only rate, but also realizes double coaxial with single pixel integration, hence it...
An <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$X$ </tex-math></inline-formula> -band filtering crossover based on ellipsoidal cavities has been designed, fabricated using 3-D printing, measured, and presented. The is designed to have three channels, each channel exhibits a third-order Chebyshev response. cavity with orthogonal modes (namely, TM notation="LaTeX">$_{101x}$ , notation="LaTeX">$_{101y}$...
Abstract In this paper, a new preparation process of nanometer black silicon is proposed, by which high trapping optical Se-doped material prepared nanosecond pulsed laser ablation high-resistance coated with Se film in HF gas atmosphere. The results indicate that the average absorptivity 400–2200 nm band before annealing 96.81%, and maintains at 81.28% after 600 degrees. Meanwhile, under technology used double four-quadrant photodetector, show that, reversed bias 50 V, unit responsiveness...
Abstract A new and compact ultra‐wideband (UWB) bandpass filter (BPF) using hybrid microstrip/coplanar waveguide (CPW) structure is proposed. The presented has been designed, fabricated, measured for UWB system. Measured results demonstrated the properties from 3.1 to 8.9 GHz (−3 dB bandwidth), which fractional bandwidth of 96% at center frequency 6.0 GHz. also exhibits a sharper slop response lower passband edge than that reported in article (Thomson Hong, IEEE Microwave Wireless Compon...
In this letter, the authors present a novel compact waveguide filtering twist that can be readily fabricated from metal using computer numerical control (CNC) machining process. This comprises four coupled resonators are rotationally deformed to provide desired 90° twist. Such resonator structures eliminate use of curved features and therefore ideally suitable for conventional CNC machining. The proposed design offers appealing advantages, including great compactness, easy fabrication, good...
The use of contact etching stop layer (CESL) stressors is a popular technique for introducing stress into transistor channel. However, when tensile applied to an n-type lateral double-diffused metal-oxide-semiconductor (LDMOS) by covering the whole device with CESL, drift region adjacent channel will be compressively strained, which detrimental performance. current work presents strained partial silicon-on-insulator LDMOS in was introduced both and via CESL reduce device’s on-resistance...