Article
Engineering, Electrical & Electronic
Shailesh Jayant, Garima Srivastava, Sachin Kumar
Summary: This paper presents a four-port single radiator ultrawideband (UWB) multiple input-multiple output (MIMO) footwear antenna for wearable applications. The antenna can be easily integrated into the footwear and offers better impedance matching and isolation performance.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Wei Hu, Qiaosong Li, Hao Wu, Zhan Chen, Lehu Wen, Wen Jiang, Steven Gao
Summary: This paper presents a novel decoupling method for designing a dual-band closely arranged MIMO antenna pair with high isolation for 5G smartphones. By combining a bent loop and a T-shaped monopole into a compact space, multiple in-phase and out-of-phase modes are excited at two different bands to reduce mutual coupling. The proposed antenna pair achieves high isolation of over 24 dB without additional decoupling structures. An 8 x 8 MIMO system is developed using four such antenna pairs, operating at 3.3-3.6 GHz and 4.4-5.0 GHz, with isolation exceeding 12.8 dB, low envelope correlation coefficients (ECCs) below 0.18, and efficiencies above 71% and 68% in the respective bands. This MIMO system features dual-band operation, compact structure, and excellent isolation, providing a promising solution for 5G smartphone antenna design.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Yu Yao, Yu Shao, Jiliang Zhang, Jie Zhang
Summary: This article presents a transparent ultrawideband (UWB) multiple-input-multiple-output (MIMO) antenna based on a wired metal mesh (MM) structure. The proposed antenna achieves 77% transparency by hollowing out both metal and substrates into a mesh shape, while maintaining more than 83% radiation efficiency. It can be easily fabricated by conventional printed circuit board (PCB) and laser cutting techniques at a low cost.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Reza Zaker, Ali Kheirdoost
Summary: The novel broadband matching and decoupling network (MDN) is designed for a symmetric two-element array of microstrip patch antennas, achieving increased efficiency and isolation through the excitation of new half-modes with parallel shorting posts. A resonator-based equivalent-circuit model is used to study the coupling mechanism. Overall, the proposed design outperforms other state-of-the-art approaches.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Ziheng Zhou, Yuehe Ge, Jiade Yuan, Zhimeng Xu, Zhizhang David Chen
Summary: This article presents a wideband printed-monopole antenna pair with enhanced isolation. A clear two-step method based on even-mode (EM) and odd-mode (OM) analyses is developed for antenna decoupling and matching. The proposed antenna pair offers isolation higher than 20 dB and total efficiency higher than 87% from 3.7 to 7.3 GHz. Furthermore, a four-element multiple-input-multiple-output (MIMO) array constructed by intersecting two of the proposed antenna pairs at their central line offers better than 20 dB isolation level from 3.8 to 7.4 GHz for every two ports.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Praveen Kumar, Sameena Pathan, Shweta Vincent, Om Prakash Kumar, N. Yashwanth, Pradeep Kumar, Pranav R. R. Shetty, Tanweer Ali
Summary: This paper presents a design of an ultrawideband (UWB) and four-port MIMO antenna. The antenna structure is modified to achieve a broader bandwidth by including guitar shape slots on the radiator and a half-circle slot in the lowered ground plane. The mutual coupling in the MIMO elements is minimized by parasitic elements and a mesh-like structure, improving isolation.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Devisowjanya Potti, Yarasi Tusharika, Mohammed Gulam Nabi Alsath, Savarimuthu Kirubaveni, Malathi Kanagasabai, Radha Sankararajan, Santosh Narendhiran, P. Balaji Bhargav
Summary: A novel optically transparent MIMO antenna for automotive applications is proposed in this article. It consists of a two-semicircular slot-loaded monopole with a staircase ground structure and is developed on a glass substrate. The antenna shows good impedance matching over a frequency of 2.4-11 GHz, with isolation greater than 20 dB and a peak realized gain of 2 dBi, making it suitable for UWB automotive applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Computer Science, Information Systems
Shanmugam Kolangiammal, Loganathan Balaji, Miroslav Mahdal
Summary: This paper presents a four-port self-isolated UWB MIMO antenna for diversity applications. The antenna is compact, has good isolation and diversity performance, and is well-suited for wireless diversity applications.
Article
Engineering, Electrical & Electronic
Kai Tan, Xudong Chen
Summary: This article proposes a novel multistatic scaling algorithm for fast 3-D imaging with UWB MIMO planar array architecture, which effectively addresses weaknesses of current imaging techniques. The algorithm corrects key range cell migration in MIMO data set and has a lower computation complexity compared to other techniques. Experimental results with synthetic and practical data demonstrate the accuracy and efficiency of the algorithm in obtaining high-quality images in less time.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Engineering, Electrical & Electronic
Mingzhe Hu, Yue Li
Summary: This paper proposes a wideband and low-profile microstrip antenna for MIMO applications, which simultaneously excites three modes to achieve wideband radiation. The proposed antenna has a compact size and low profile, making it suitable for 5G mobile MIMO applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Lei Wang, Qingbi Liao
Summary: This study introduces a Ka-band multibeam horn array implemented in a single-layer planar substrate, covering a 360-degree azimuth range with 12 beams. The antenna achieves wideband matching and low sidelobe levels, with the potential for increased gain in specific configurations.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Computer Science, Information Systems
Weidong Mu, Han Lin, Zhonggen Wang, Chenlu Li, Ming Yang, Wenyan Nie, Juan Wu
Summary: An ultra-wideband MIMO antenna with a compact size is proposed in this paper. The antenna consists of two radiating components and incorporates a T-like ground branch for decoupling. Simulation and measurement results show that the proposed antenna exhibits high isolation performance and is suitable for diverse UWB applications.
Article
Computer Science, Information Systems
Partha Pratim Shome, Taimoor Khan, Ahmed A. Kishk, Yahia M. M. Antar
Summary: This study presents a miniaturized quad-element MIMO antenna with low mutual coupling and inherent isolation for an IoT-based high-speed smart entertainment network. The antenna, using UWB technology, achieves wide bandwidth, high gain, and good isolation without dedicated decoupling structure. The antenna is suitable for UWB applications based on its simulated and measured results.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Chemistry, Analytical
Aiting Wu, Yingxiang Tao, Pengquan Zhang, Zhonghai Zhang, Zhihua Fang
Summary: This paper proposes a novel four-port multiple-input multiple-output (MIMO) antenna with an asymptote-shaped structure that overcomes the limitations of existing designs for ultrawide-band (UWB) applications. The antenna elements are placed orthogonally to each other for polarization diversity, and each element features a stepped rectangular patch with a tapered microstrip feedline. The unique structure significantly reduces its dimensions, making it highly desirable for use in small wireless devices.
Article
Engineering, Electrical & Electronic
Xide Mei, Ke-Li Wu
Summary: In this article, a capacity-oriented envelope correlation coefficient (ECC) is proposed for assessing a multiple antenna system of a MIMO mobile device. The ECC-M is proven to reflect the impact of radiation patterns and total efficiencies of multiple antennas on channel capacity. By studying two channel models, an easy-to-use ECC-M expression is derived and shown to be important in assessing the performance of multiple antennas.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Chemistry, Multidisciplinary
Nan Wang, Julian S. Evans, Jianhao Zhang, Chenxi Li, Sailing He
Summary: In a liquid crystal emulsion, chemically different guest phases reside in the topological disclinations of the host phase. These disclinations act as effective capillaries, leading to various meniscus and droplet phenomena. This demonstrates that anisotropic forces associated with liquid crystal molecules play a critical role in determining the shape and properties of a phase boundary.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Correction
Multidisciplinary Sciences
Jing Chen, Yanxiao Zhao, Xuanjie Luo, Hao Hong, Tongqing Yang, Shen Huang, Chunli Wang, Hongyu Chen, Xin Qian, Mingfeng Feng, Zhengqiang Chen, Yongxin Dong, Zhenchuan Ma, Jia Li, Min Zhu, Sheng Yang He, Savithramma P. P. Dinesh-Kumar, Xiaorong Tao
Article
Materials Science, Multidisciplinary
Qiyun Lei, Zhonglin Luo, Xinyi Zheng, Na Lu, Yiming Zhang, Jianfeng Huang, Liu Yang, Shiming Gao, Yiyong Liang, Sailing He
Summary: This study presents a broadband transparent and flexible silver (Ag) mesh for efficient electromagnetic interference (EMI) shielding and high-quality free-space optical (FSO) communication in the X band. The Ag mesh demonstrates high transmission and low sheet resistance, achieving a high average EMI shielding effectiveness (SE) in the X band. The FSO communication benefits from the high optical transmittance and low haze, and it remains unaffected by chemical corrosions and bending cycles.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Physics, Applied
Yan Huang, Tie Zhang, Gao-Xuan Wang, Yu-Xin Xing, Sai-Ling He
Summary: A multi-gas sensing system based on wavelength-modulated differential photoacoustic spectroscopy was developed for simultaneous measurement of acetone and methane. It accurately assesses the concentration of acetone and methane, which is crucial for medical diagnosis purposes.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Yuting Zou, Zongxing Lin, Sailing He
Summary: This paper proposes a low-cross-talk and thermo-insensitive 1 x 4 coarse wavelength-division multiplexing device on the silicon-on-insulator platform. Compact Mach-Zehnder interferometers (MZIs) and slot waveguides are used to achieve wavelength-insensitive power splitting, while the trade-off between the opposite thermo-optical coefficients of the Si core and SU8 cladding is utilized to overcome the strong thermo-optic effect of silicon.
Article
Optics
Xiaoxuan Zheng, Zongxing Lin, Qiangsheng Huang, Sailing He
Summary: A novel structure utilizing a densely packed bent waveguide array is presented to eliminate mode hybridization in X-cut LiNbO3. The proposed structures show a polarization extinction ratio of -30 dB across all bend radii and low excess loss.
Article
Optics
Tie Zhang, Lihui Wang, Yan Huang, Haijie He, Sailing He, Gaoxuan Wang
Summary: A high-power near-infrared wavelength-modulated differential photoacoustic spectroscopy sensor has been developed for parts-per billion level methane detection using a homemade Raman fiber optical amplifier. Through the use of a commercial laser and specific techniques, the performance of the sensor is greatly improved, achieving a minimum detection limit of 10 ppb.
Article
Optics
Xiang Chen, Xuhui Huang, Sailing He
Summary: A four-dimensional hyperspectral surface topography measurement system is proposed to acquire three-dimensional spatial data and reflection/fluorescence spectra of an object. The system can assign spectral data to corresponding 3D point clouds, forming a 4D model. Experimental results demonstrate the great potential of the system in plant phenotype and growth analysis.
Article
Engineering, Electrical & Electronic
Yi-Ming Zhang, Ming Yao, Shuai Zhang
Summary: This letter proposes a wideband decoupling method to suppress the mutual coupling among dual-polarized millimeter-wave antenna arrays. With the proposed decoupling structure, the coupling between elements can be reduced, achieving a high isolation level. An 8 x 8 millimeter-wave dual-polarized antenna array is developed to validate the effectiveness and feasibility of the proposed method through full-wave simulations and measurements.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Peiye Liu, Gert Frolund Pedersen, Wonbin Hong, Shuai Zhang
Summary: A dual-polarized wideband low-sidelobe slot array antenna for wireless communication systems in the V-band is proposed. The design utilizes Taylor distribution and compact wideband unequal power dividers to achieve stable amplitude and phase distribution among elements. Orthogonally polarized feeding networks with unequal power dividers are used to connect the subarrays to the input ports. The fabricated prototype demonstrates high gain, wide impedance bandwidth, and low sidelobe levels.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Nanoscience & Nanotechnology
Nan He, Tingbiao Guo, Jiahan Tian, Ji Du, Zhipeng Hu, Yuxin Xing, Yi Jin, Junping Zhang, Sailing He
Summary: Free space optical communication (FSO) is gaining attention due to high information capacity demand. A novel duplex FSO system utilizing a compact fiber coupling metalens is demonstrated, achieving a large field of view and high coupling efficiency. The system shows excellent downlink/uplink communication performance with low bit error rate and clear eye diagram, meeting the requirements of smart devices.
Article
Chemistry, Multidisciplinary
Zhenjia Zeng, Lei Wang, Yiran Wu, Zhipeng Hu, Julian Evans, Xinhua Zhu, Gaoao Ye, Sailing He
Summary: This research explores the data shift challenge in AI-based electromagnetic solvers and proposes innovative solutions. The combination of mixed training and multi-head attention significantly reduces the mean absolute error of data affected by data shift.
Article
Chemistry, Multidisciplinary
Yiran Wu, Xinhua Zhu, Qiangsheng Huang, Yuan Zhang, Julian Evans, Sailing He
Summary: Fruit quality assessment is crucial for market value, consumer acceptance, and post-harvest management. Spectroscopic techniques have become popular for non-destructive evaluation. In this study, a deep-learning network called GCNN-LSTM-AT is proposed for predicting five important parameters of tangerines using visible and near-infrared spectroscopy. The proposed model combines GCN, CNN, LSTM, and attention mechanism to capture spatial and sequential dependencies and achieves accurate predictions for tangerine quality attributes exceeding other algorithms and models.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Electrical & Electronic
Shengyuan Luo, Yiming Zhang, Peng Mei, Gert Frolund Pedersen, Shuai Zhang
Summary: This paper proposes a decoupling concept of near-field shrinking dielectric superstrate (NFSDS) for large-scale, wideband, and dual-polarized mm-wave arrays. By loading a superstrate with a certain thickness and low permittivity, the total coupling of the mm-wave arrays is significantly reduced. The concept is verified through simulation, fabrication, and measurement.
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Stanislav Stefanov Zhekov, Ming Yao, Carla Di Paola, Bo Xu, Shuai Zhang
Summary: This study quantifies the exposure metrics of SAR, IPD, and APD for different UE antenna designs and investigates the correlation between IPD and APD within the frequency range of 6-10 GHz. The results show that the IPD does not correlate well with the APD when the reactive near-field of the antenna is of interest. The validation results demonstrate a good agreement between numerical and experimental measurements.
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2023)
