A5100364845- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Millimeter-Wave Propagation and Modeling
- Radio Frequency Integrated Circuit Design
- Electromagnetic Compatibility and Noise Suppression
- Metal and Thin Film Mechanics
- Photonic and Optical Devices
- Energy Harvesting in Wireless Networks
- Advancements in PLL and VCO Technologies
- Metamaterials and Metasurfaces Applications
- Advanced Fluorescence Microscopy Techniques
- Semiconductor materials and devices
- Advanced SAR Imaging Techniques
- Energetic Materials and Combustion
- Image Processing Techniques and Applications
- Parallel Computing and Optimization Techniques
- Superconducting and THz Device Technology
- Photoacoustic and Ultrasonic Imaging
- Bluetooth and Wireless Communication Technologies
- Distributed and Parallel Computing Systems
- Target Tracking and Data Fusion in Sensor Networks
- Optical Coherence Tomography Applications
- Gyrotron and Vacuum Electronics Research
- GNSS positioning and interference
State Key Laboratory of Millimeter Waves
2019-2024
System Equipment (China)
2024
Shenzhen University
2018-2024
Hubei University of Technology
2024
University of Electronic Science and Technology of China
2012-2024
Harbin Institute of Technology
2024
Kunming University
2024
Nanyang Normal University
2022-2024
North China University of Technology
2024
Shenzhen Research Institute of Big Data
2022-2023
A 3-D printed fourth-order cavity bandpass filter (BPF) centered at 10 GHz and with a 3% fractional bandwidth is presented in this letter. The BPF was designed using two high-Q spherical dual-mode resonators, fabricated stereolithography-based printing technique. Compared to filters constructed by square or cylindrical the use of resonator gives wider spurious-free region. In order fully exhibit light weight advantage additive manufacturing, redundant material outside removed. addition,...
This article reports on a new class of broadband and fully 3-D printed E-plane coax-to-waveguide transition monolithically waveguide magic-T based the transition. The is constructed by section air-filled rectangular coaxial transmission line (TL) that placed between two probe transitions. It used to interconnect magic-T's sum port T-junction. incorporation reorients all arms into E-plane. Some X-band prototypes proposed are designed implemented. Polymer-based additive manufacturing copper...
This paper provides a comprehensive presentation for the RF design and implementation of novel millimeter-wave waveguide bandpass filters (BPFs) that are composed compact hemispherical resonators. The proposed resonator features high unload quality factor volume 50% smaller than spherical one more significantly is much less degenerate latter due to its structural asymmetry. With proper geometrical configurations, BPF can perform improved out-of-band rejections compared with BPFs same orders....
With the discovery of quantum valley Hall insulators in sonic systems, concept degree freedom valleytronics condensed physics has been introduced to fields. Many papers concentrate on transmission characteristics symmetric topological states, which provide an equal splitting ratio at two ports; however, few studies focus asymmetric edge states. In this paper, we achieve transport a insulator, by introducing thus carry out waveguide with arbitrary ports. As example, splitter $1/2$ ports is...
Random distributed feedback fiber laser (RDF-FL) based on combination of Er-doped (EDF) and single-mode (SMF) is proposed in this paper. Through pumping both the EDF (i.e., 1480 nm pump) SMF 1455 pump), random lasing obtained. With increase pump powers, different transitions between chaotic stable status output spectrum are observed. Especially, single-peak can be obtained under operation regime.
In this paper, a third-order waveguide bandpass filter (BPF) based on slotted spherical resonators with wide spurious-free stopband is presented. The resonator consists of cavity slots opened at the top and bottom. Compared non-slotted resonator, suppresses two spurious modes (TM211 TE101) whilst maintaining fundamental TM101 mode. unloaded quality factor mode not significantly degraded. This achieved by interrupting surface current radiating unwanted slots. BPF designed center frequency 10...
The interoperability between the vehicle assembly and ground of wireless charging systems has been specified in international standards. SAE J2954 first proposed an evaluation method based on interface impedance. However, impedance measurement is challenging at high frequency since phase difference voltage current not easy to measure accurately, especially when it close 90°. Small errors angle are amplified calculation due sine/cosine function. This letter proposes using power decomposition...
Broadband planar and non-planar negative refractive index (NRI) metamaterial (MTM) designs consisting of a periodically arranged split ring resonator wire structures are developed in the terahertz (THz) frequency regime using Finite-Difference Time-Domain (FDTD) method.The novel MTM generate broad refraction (NIR) passband approximately two half times higher than those conventional SRR/wire structures, by same dimensions.Numerical simulations wedgeand triangle-shaped metamaterials used to...
A novel negative refractive index (NRI) chiral meta-material (MTM), based on the Y structure, has been designed and tested in microwave terahertz frequencies. In addition to providing magnetoelectric coupling, this MTM a of refraction passband that can be tuned both frequency operation bandwidth with lower losses compared other known structures. Group theory was used analyze coupling Y-shaped structure circuit analysis aid design NRI material full-wave finite difference time domain (FDTD)...
Distributed Raman amplification (DRA) based on ultra-long fiber laser (UL-FL) pumping with a ring cavity is promising for repeaterless transmission and sensing. In this work, the characteristics (including gain, nonlinear impairment noise figure) forward backward of ring-cavity DRA scheme are fully investigated. Furthermore, as typical application proposed configuration, ultra-long-distance distributed sensing Brillouin optical time-domain analysis (BOTDA) over 142.2 km 5m spatial resolution...
Active phased array antenna typically featured high performance, device integration, and heat flux, making it difficult to dissipate heat. Diamond, the substance with closest arrangement of atoms in nature, has advantages a thermal conductivity strong adaptability space environment. The batch applications high-thermal-conductivity diamonds for management antennas inter-satellite links were introduced this paper. diamond was developed by direct-current arc-plasma chemical vapor deposition...
Radio frequency energy harvesting offers a promising solution to provide low power Internet of Things (IoT) devices with convenient and perpetual supply. In this work, we investigate the reliable performance an energy-constrained transmitter communicating receiver over Nakagami-m channel, where effects transceiver hardware impairments finite blocklength coding are jointly considered. Specifically, communication link between operates within coverage existing wireless system, radio signal from...
This paper presents a helical resonator bandpass filter produced using stereolighography (SLA) based 3-D printing technique. The is formed of four coupled resonators, and for each the helix fixed at both ends so that less prone to vibration. designed have variable width this yields enhanced performance in terms higher unloaded quality factor spurious resonance frequencies. Such ideally suited which allows easy production complex structures. whole printed from resin, then plated with metal,...
Increasing demand for DRAM scaling and high-bandwidth has driven technology to 3D/2.5D integration. With the innovative Hybrid Bonding technology, a new Stacked Embedded (SEDRAM) architecture was developed on LPDDR4/4X product. In this SEDRAM, array wafer logic were fabricated separately then face-to-face fusion connected through ultra-high-density, low-resistance Bonding. By separating control, I/O, DFT periphery circuits die, SEDRAM offers novel approach product development accomplishes an...
A new class of slotted spherical antenna is proposed in this letter. The composed a single air-filled high-quality-factor resonator that properly on the cavity shell, and fed by rectangular waveguide other side slots, radiating TM101 TM211 modes. three-slot prototype operating at X- Ku-bands designed implemented as proof concept. Good directional radiation patterns are achieved both bands optimizing dimensions three circumferential slots. additively monolithically manufactured incorporating...
Abstract Several types of electrode materials have been developed for high–performance supercapacitors. Most the relevant studies focused on discovery new atomic structures and paid limited attention to effect heterostructures in supercapacitor electrodes, which has long hindered fundamental understanding use hybrid In this study, a novel heterostructure based perovskite oxide (LaNiO 3 ) nanosheets polyazulene was synthesized. The as–prepared heterostructure–based exhibited specific...
In order to describe the camera internal geometrical and optical parameters, relation between object in three-dimensional space, traditional calibration methods usually need assume lots of priori knowledge, establish precise mathematical model then decompose calculate those parameters we need. While artificial neural network has outstanding non-linearity mapping performance, can avoid these process. It only needs provide some data input output for net, imply various into connection weights...
A new class of hemispherical resonators featuring a high unloaded quality factor (Q <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">u</sub> ) and compact geometrical configuration is proposed for the first time 3-D printed bandpass filter (BPF) applications. The resonator exhibits volume only half that spherical one at same dominant-mode resonant frequency, without losing its intrinsic characteristic Q . Electromagnetic field analysis...
This paper presents a monolithic integration of Ka-band fourth-order spherical resonator bandpass filter that is fabricated with ceramic-filled resin using stereo-lithography-based 3-D printing technique. The designed quadruplet coupling topology to improve its out-of-band rejection, and printed as single structure instead multiple parts, without the need post-fabrication assembly. Surface metallization model achieved by employing electroless nickel/copper plating. demonstrated prototype...