A5006290654- Millimeter-Wave Propagation and Modeling
- Microwave Engineering and Waveguides
- Advanced MIMO Systems Optimization
- Antenna Design and Analysis
- Power Line Communications and Noise
- Radio Frequency Integrated Circuit Design
- Electromagnetic Compatibility and Measurements
- Antenna Design and Optimization
- Advanced Antenna and Metasurface Technologies
- High voltage insulation and dielectric phenomena
- Human-Automation Interaction and Safety
- Orbital Angular Momentum in Optics
- Metamaterials and Metasurfaces Applications
- Advancements in PLL and VCO Technologies
- Maritime Navigation and Safety
- Electrostatic Discharge in Electronics
- Plasma Diagnostics and Applications
- Electromagnetic Compatibility and Noise Suppression
- Risk and Safety Analysis
- Bluetooth and Wireless Communication Technologies
North China Electric Power University
2025
China Electric Power Research Institute
2025
Southeast University
2018-2024
State Key Laboratory of Millimeter Waves
2018-2024
Shanghai Maritime University
2011
Ever since the deployment of first-generation mobile telecommunications, wireless communication technology has evolved at a dramatically fast pace over past four decades. The upcoming fifth-generation (5G) holds great promise in providing an ultra-fast data rate, very low latency, and significantly improved spectral efficiency by exploiting millimeter-wave spectrum for first time infrastructures. In years beyond 2030, newly emerged data-hungry applications greatly expanded network will call...
The rapid advancement of prevailing communication/sensing technologies necessitates cost-effective millimeter-wave arrays equipped with a massive number phase-shifting cells to perform complicated beamforming tasks. Conventional approaches employing semiconductor switch/varactor components or tunable materials encounter obstacles such as quantization loss, high cost, complexity, and limited adaptability for realizing large-scale arrays. Here, low-cost, ultrathin, fast-response, solution...
This letter reports a strategy of full-digital arrays with nonreciprocal transmitting (Tx) and receiving (Rx) beam patterns, for the first time, 5G/6G wireless communications. The proposed array contains smaller number Rx channels than that Tx channels. unequal makes patterns asymmetrical, which would not only release burden data processing but also reduce hardware cost power consumption entire system. Importantly, as compared conventional large-scale beamforming arrays, will deteriorate...
In this paper, a 37-42.5GHz (N260 Band) 64 channel full-digital multi-beam array for 5G massive multiple input output (MIMO) applications is developed. The built on time division duplexing (TDD) architecture in which the transmitter and receivers are independent working separately to enable more flexible configuration hardware distribution. antenna elements of aligned way that 16 lie horizontal 4 vertical direction deliver higher beam resolution plane. By using cables unequal lengths, ×...
Accurately detecting defect-induced photon emissions enables early defect detection and characterization. To address this, a evolution state recognition model based on phase-resolved counting dimensionality reduction calculations is proposed under alternating current (AC) excitation. Initially, information from protruding metal defects simulated using needle–plane electrodes during partial discharge (PD) analyzed in SF6. Subsequently, (PRPC) techniques statistical analysis are employed to...
In this paper, a Ka-band digital beamforming array transmitter (DBFAT) using direct synthesizer (DDS) for millimeter-wave (mmW) applications is proposed. The system architecture, realization, generation, and measurement process of multiple beams are introduced. element consists two kinds tapered slot antennas with opposite fin orientations. They placed in the side-by-side configuration such that undesirable orthogonal electrical field suppressed, thereby decreasing cross-polarization level...
In this article, a self-calibration method for 5G full-digital time-division duplexing (TDD) beamforming systems is proposed and demonstrated, including the both transmit (Tx) receive (Rx) channels. By incorporating an embedded transmission line (ETL) in antenna array that weakly couples with all radiating elements, relative magnitude phase of each Tx/Rx channel can be obtained calibration procedure. Comparing conventional methods, approach requires simpler hardware reduced time. As...
In this talk, a brief review on the newly proposed concept of asymmetric millimeter wave (mmWave) massive multi-input and multi-output (MIMO) system for beyond 5G(B5G) 6G mobile communications is presented, including architecture, requirements integrated circuits (ICs) design etc., some research advances.
Safety is the eternal theme in shipping industry. Research shows that human error main reason of maritime accidents. Therefore, it very necessary to research marine errors, discuss contexts which caused errors and how effect behavior. Based on detailed investigation collision avoidance behavior most key mission navigation Performance Shaping Factors (PSFs), reliability mariners was analyzed by using integration APJE SLIM. Result this combined method effective can be used for reliability.
The design and implementation of a highly integrated reliable single board 8-channel transceiver at 3.5GHz is developed for massive MIMO system in 5G wireless communications. Based on this board, large scale 2D arrays, such as <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">${8\text{x}8}$</tex> array, can be easily formed. On each 8 transmitting channels receiving TDD mode are Tx/Rx channel shares one antenna element. This provide verification...
This letter proposes a novel four-dimensional multiprobe anechoic chamber (4D-MPAC) method for emulating time-domain nonstationary channel models of over-the-air testing. The proposed adds time dimension to the 3D-MPAC system, so that model with spatial parameters changing over can be emulated. In addition, 4-D power angular spectrum similarity percentage (4D-PSP) as figure merit evaluate accuracy reconstruction is first time. Based on 4D-PSP, genetic algorithm designed reduce number active...
This paper presents a systematic investigation and demonstration of K-band circularly polarized liquid-crystal-based phased array (LCPA), including the design, over-the-air (OTA) in-array calibration, experimental validation. The LCPA contains 16 phase-shifting radiating channels, each consisting stacked patch antenna phase shifter (LCPS) based on loaded differential line structure. Thanks to its slow-wave properties, LCPS exhibits maximum range more than 360° with figure merit 78.3°·dB−1...
In this paper, a V-band waveguide-to-microstrip transition based on an antipodal fin-line is presented. A back-to-back structure fabricated and measured. To accomplish the measurement, metallic body with cavity manufactured, it could be used for further test device like amplifier chip. The printed circuit board (PCB) easy to installed in E-plane of split-block waveguide. Measured results show that module provides return loss better than 14 dB low insertion across whole V-band.
This paper presents the design and implementation of a multi-channel frequency synthesizer for 5G massive MIMO systems 3.4-3.6 GHz. is based on microwave wideband chip with integrated VCO. Several considerations balancing performance phase noise, spurs, resolution locking time are discussed. The proper detector frequency, loop filter, RF power filtering circuit designed. To apply this to 64-channel local 3.875 GHz, an 8-way Wilkinson splitter amplifier modules also According structure,...
In this paper, a 64 channel, full digital beamforming massive MIMO system centered at 3.5 GHz is designed for 5G application. The RF bandwidth of the 3.4-3.6 GHz, which has ability to support 200 MHz modulated signal. Besides, channel synchronized direct synthesizer(DDS) as well ADC are signal generation and capture purpose, respectively. whole was calibrated tested through Over-The-Air (OTA) method. effective isotropic radiated power (EIRP) after calibration 43 dBm, making it possible...
In this paper, a high-performance up/down-convertor covering the frequencies from 24GHz to 40GHz was reported. It used for frequency extension purpose of sub-6GHz channel emulator. The measured error vector magnitude (EVM) metric is below 1% tested by standard 400MHz 5G millimeter wave (mmWave) waveform signal, which suitable mmWave system performance test.
The Particle Swarm Optimization (PSO) method is implemented to diagnose the defective elements in 5G large-scale antenna arrays using planar near-field data this paper. used PSO has an advantage limited signal-to-noise (SNR) scenario compared commonly back propagation diagnosis method. Numerical simulation results are given validate priority of proposed