Wenyan Nie

Huainan Normal University

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Zhonggen Wang

Anhui University of Science and Technology

Yufa Sun

Anhui University

Chenlu Li

Anhui University

Ming–Hsuan Yang

University of California, Merced

Mingqing Wang

Anhui University of Science and Technology

Lin Han

Anhui University of Science and Technology

Weidong Mu

Nanjing University of Aeronautics and Astronautics

Weidong Mu

Shandong University

Pan Wang

University of Electronic Science and Technology of China

Han Lin

Shanghai Institute of Ceramics

Cooperative Institutions

Anhui University of Science and Technology

Chinese Academy of Sciences

Huainan Normal University

Anhui University

University of Science and Technology of China

University of Chinese Academy of Sciences

Beihang University

Zhejiang University of Technology

Chinese Academy of Medical Sciences & Peking Union Medical College

Chongqing Jiaotong University

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Fast Analysis of Bistatic Scattering Problems for Three-Dimensional Objects Using Compressive Sensing and Characteristic Modes

IEEE Antennas and Wireless Propagation Letters (2022)

Zhonggen Wang Pan Wang Yufa Sun Wenyan Nie

In this letter, a combination of characteristic mode (CM) and compressive sensing (CS) is utilized to accelerate the solution of bistatic scattering problems of three-dimensional (3-D) objects. The surface induced currents discretized by Rao–Wilton–Glisson basis functions are successfully sparsely transformed by CM basis functions based on domain decomposition. Different from the dense matrix equation of traditional method of moments (MoM), a low-rank CS model with smaller size is constructed in the proposed method, wherein the induced currents can be reconstructed efficiently. Due to partially filling of the impedance matrix and efficient recovery algorithm, the time cost in the proposed method is reduced dramatically. Last, the results from several numerical simulations validate the efficiency and accuracy of the proposed method.

Impedance parameters

Basis function

Matrix (chemical analysis)

Basis (linear algebra)

Matrix pencil

10.1109/lawp.2022.3181602

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Citations (16)

SENSORLESS CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTOR BASED ON OPTIMIZATION OF NON-SINGULAR FAST TERMINAL SLIDING MODE OBSERVER, 138-144.

Mechatronic systems and control (2022)

Wenyan Nie Zhonggen Wang Lele Yu Junwen Mu

A novel terminal slide observer based on the fast reaching lawis proposed in this paper, which is used to accurately estimaterotor position and speed of a permanent magnet synchronous motor(PMSM) for a sensorless vector control system.

Terminal sliding mode

Observer (physics)

Position (finance)

Synchronous motor

10.2316/j.2022.201-0274

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Ultra-wide Band Characteristic Basis Function Method and Best Uniform Approximation

The Applied Computational Electromagnetics Society Journal (ACES) (2016)

Wenyan Nie Zhonggen Wang

The ultra-wide band characteristic basis function method (UCBFM) is an efficient approach to calculate wideband radar cross section (RCS) of objects, but its calculation errors at lower frequency points are great and the reduced matrix at each frequency point needs to be reconstructed, which are very time-consuming. To solve these problems, an effective numerical method for fast calculating wideband RCS of objects by combining improved UCBFM (IUCBFM) and best uniform approximation is proposed. This method improves the construction of the ultra-wide band characteristic basis functions (UCBFs) through solving the secondary level characteristic basis functions (SCBFs). In consideration of the mutual coupling effects among sub-blocks, the improved UCBFs contain more current information characteristics, which greatly improve the calculation precision at lower frequency points. Moreover, to avoid the reconstruction of reduced matrix at each frequency point, the best uniform approximation technology is used to fast predict the surface current at any frequency point in the given frequency band and further realize the fast calculation of wideband RCS of objects. Compared with traditional UCBFM, the method in this paper significantly improves the calculation accuracy and efficiency. Numerical results demonstrate that the proposed method is accurate and efficient.

Basis function

Wideband

Basis (linear algebra)

Frequency band

Radar cross-section

Matrix (chemical analysis)

Source

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A Racket-like UWB MIMO Antenna with High Isolation

Progress In Electromagnetics Research C (2024)

Zhonggen Wang Guoxiang Song Wenyan Nie Ming–Hsuan Yang Chenlu Li

In this paper, a dual-port ultra-wideband (UWB) MIMO antenna is proposed, featuring a highly compact structure with dimensions of only 25 × 36 × 1.6 mm 3 .The designed antenna comprises two racket-shaped monopole antennas and a defective floor.Cross slots on the original T-shaped floor impede coupling current flow, significantly enhancing antenna isolation to achieve over 20 dB isolation across most frequency bands.The antenna operates at frequencies from 2.74 ∼ 14.8 GHz, meeting the stringent design criteria for UWB antennas.Furthermore, the diversity performance of the antenna is rigorously analyzed by simulating the envelope correlation coefficient (ECC), diversity gain (DG), total active reflection coefficient (TARC), and channel capacity losses (CCL).The designed antenna demonstrates excellent performance through comprehensive simulation and testing, showcasing its potential for applications in UWB MIMO systems.

Diversity gain

Isolation

Reflection coefficient

10.2528/pierc24052901

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Compact ACS-fed MIMO antenna with dual-band notch characteristics for UWB applications

International Journal of Microwave and Wireless Technologies (2023)

Zhongyuan Lu Lin Han Zhonggen Wang Wenyan Nie Weidong Mu

Abstract An ultra-wideband (UWB) and compact-size four-port multiple input multiple output (MIMO) antenna with a footprint of 34 mm × 34 mm fed by an asymmetric coplanar strip (ACS) is investigated. The proposed antenna is composed of four orthogonally placed identical modified elliptical-shaped radiators and achieves an impedance bandwidth of 3.4–12.2 GHz. By etching two inverted L-shaped slots in the radiator element, WLAN band and X-band are rejected in the operating communication range. Because of the usage of a meander line decoupler, the isolation enhancement at the 8–12 GHz band is achieved and the isolation is more than 18 dB for most of the UWB range. The performance of the proposed antenna is studied in terms of isolation between each port, radiation pattern, current distribution, gain, envelope correlation coefficient, diversity gain, and total active reflection coefficient. The compact size and reduced complexity make the proposed design highly suitable for portable devices.

Reflection coefficient

10.1017/s1759078723001277

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Novel construction of measurement matrix and sparse basis to accelerate compressive sensing for solving wideband RCS of PEC objects

Microwave and Optical Technology Letters (2023)

Chenwei Li Zhonggen Wang Wenyan Nie Yufa Sun Pan Wang

Abstract This paper proposes a novel approach to enhance the computational efficiency and precision of the ultra‐wideband characteristic basis function method based on compressive sensing for calculating the wideband radar cross section (RCS) of objects, which involves the development of a new method for filling measurement matrix and constructing sparse basis. While randomly selecting rows from the original impedance matrix as the measurement matrix, the proposed method also avoids the double‐filling of equal elements in the measurement matrix. Furthermore, the Foldy–Lax equation is utilized to construct the merged ultra‐wideband characteristic basis functions (MUCBFs) at the highest frequency, and the sparse transform of the induced currents is performed using MUCBFs as the sparse basis. The numerical simulation results show that this method not only reduces the calculation effort of impedance matrix filling, but also effectively improves the calculation precision of the target wideband RCS.

Wideband

Matrix (chemical analysis)

Basis (linear algebra)

Basis function

Impedance parameters

Radar cross-section

10.1002/mop.33940

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A Composite Mode Filtering Model Based-on Content

International Conference on Computer Science and Service System (2012)

Wenyan Nie Zhonggen Wang

Most of existing text filtering systems are based on keywords, this kind of system can accomplish filtering task basically, not requiring a high precision. To improving the efficiency of filtering, the paper presents a composite mode filtering model based-on content. Its main idea is shown as follows: the matching of Semantic framework based-on the matching technology of keywords ensures the speed of information filtering, and also improves the precision of information filtering. Then its validity is proved by instances.

Mode (computer interface)

Content (measure theory)

Information filtering system

10.1109/csss.2012.418

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Application of infrared imaging in temperature protecting of coal conveyor system

Mining & Processing Equipment (2010)

Wenyan Nie

The temperature protection is the important link for the protection of conveyance system in underground collieries.The infrared temperature sensor is used widely in domestic collieries,its stability,timeliness and precision etc.still need to improve.The infrared imaging technology was used to analyze the infrared radiation of the conveyance system,so as to realize the temperature monitor.It proved feasible through experiments.

Conveyor system

Source

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Design of MIMO Antenna with Double L-Shaped Structure for 5G NR

Symmetry (2023)

Zhonggen Wang Wenshi You Ming Yang Wenyan Nie Weidong Mu

To satisfy the demand for 5G communication to smartphone terminal antennas in element quantity and isolation, an eight-element wideband MIMO antenna set of high isolation level is proposed. Each antenna element in the array is a double-L antenna consisting of an L-shaped slot and an L-shaped 50 Ω microstrip line. The L slot is formed by adding an I-shaped open circuit directly to the side of the rectangular slot. In addition, the antenna arrays are located on the long bezels on both sides of the mobile phone motherboard, and the coupling feed is made in the frequency range of 3.6–4.7 GHz through the L-shaped microstrip line, so as to cover the 5G NR band (N77/N78/N79). Finally, the four element pairs (8 components) achieve isolation of greater than 11 dB, the performance frequency range is 3.6–4.7GHz, the return loss is −6 dB, the total efficiency is greater than 85%, and the envelope correlation coefficient is less than 0.08. Other MIMO performances are also calculated, the design process is discussed in detail, and one-handed grip mode and two-handed grip mode are discussed to demonstrate their stabilities in real-world applications.

Patch antenna

10.3390/sym15030579

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Citations (8)

Design of Wideband 8-element MIMO Mobile Phone Antenna Based on Sub-6 GHz NR Band

Progress In Electromagnetics Research C (2023)

Zhonggen Wang Mingzhong Li Ming–Hsuan Yang Wenyan Nie Weidong Mu

For the research of 5G NR band mobile phone bezel antenna, this paper proposes an 8-Element Multiple-Input Multiple-Output (MIMO) handset bezel antenna design for 5G New Radio (5G NR) bands.Moreover, the MIMO antenna's array is implemented by loading 8 identical antennas (Ant1-Ant8) into the metal bezel of the smartphone to form an 8-antenna array for a sub-6 GHz 8 × 8 MIMO system.In this setting, each antenna unit is a slot antenna type consisting of a Chinese character " "-shaped slot, as well as a 50 Ω micro-strip feeder; note that a satisfactory impedance matching is achievable in the upper-frequency band by loading a tuning stub on the feeder.The proposed 8-element antenna array covers 5G new radio (NR) band including N77 (3.3-4.2GHz), N78 (3.3-3.8GHz), N79 (4.4-5.0GHz), and a Wi-Fi (2.4 GHz) band with a 10 dB impedance bandwidth.It is important to note that in addition to exhibiting ideal antenna efficiency and envelope correlation, the isolation between adjacent array elements is > 10 dB, and the peak gain is 3 dBi.In summary, the influence of the user's hand on the antenna is analyzed to ensure the robustness of the MIMO antenna system in practical applications.

Wideband

Mobile phone

10.2528/pierc22121602

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Citations (1)