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Pattern reconfigurable antenna array for 5.8 GHz WBAN applications
杨凌升,王斌,李雅洁
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 9, Pages 1357-1365 doi: 10.1631/FITEE.2200542
Status quo and outlook of reconfigurable research
Li Yufeng,Qiu Han,Lan Julong
Strategic Study of CAE 2008, Volume 10, Issue 7, Pages 82-89
Today, with new services and applications blooming on the internet, to enable traditional routers to offer enough capability and speed of upgrade along with these services and applications in time would become even harder than ever. Run-time reconfiguration (RTR), based on the Field Programmable Gate Array (FPGA), is a new promising technology that can configure the partial or total hardware logic resources of a system at run time. Based on the technology, reconfigurable routers can support dynamic reconfiguration of new hardware logic for the new service, while keeping the other services still run properly, hence can provide a new possible solution to the update problem of the traditional routers. After introducing the basic concepts of RTR and the current development of the FPGA, this paper summarizes the past major research efforts with respect to the reconfigurable router, as well as the current work on it. Research directions and open problems are also discussed from the point of view of reconfigurable network.
Keywords： internet reconfigurable router reconfigurable network programmable hardware
Jing Minqing,Li Meng,Liu Heng
Strategic Study of CAE 2013, Volume 15, Issue 1, Pages 34-38
The "system engine + function component" architecture for the reconfigurable monitoring and diagnostic system is presented. And three types of embedded monitoring units (vibration, power and acoustic emission) are designed for four function parts of machine tool, which can greatly improve the real-time and flexibility of the bottom monitoring information acquisition. This paper has also developed a series of regular monitoring and diagnostic components for computer numerical control (CNC), and some special components for special requirements of these machines. Then the monitoring and diagnostic system for specific machine tools, which has been running in the Qinchuan Grinding Machine Co. Ltd. and Dalian Machine Tool Group Co., can be realized by conveniently packaging and loading of these function components.
Keywords： monitoring and diagnostic system for machine tool reconfigurable system engine function component
A novel wideband ring antenna for polarization/pattern diversity Correspondence
Li SUN, Shigang ZHOU, Guanxi ZHANG, Baohua SUN
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 6, Pages 975-983 doi: 10.1631/FITEE.2100421
We present a novel wideband ring antenna for polarization/pattern diversity. The proposed antenna consists of eight printed dipole elements in the form of a circular array. The arms of adjacent elements overlap for capacitive loading. Unlike traditional circular arrays, a method of exciting elements in the form of every two intervals is first introduced. We prove that this method can maintain the wideband characteristics of the antenna. Four independent feeding ports in a ring antenna aperture are designed for the polarization/pattern diversity with suitable feeding networks. As an example, a wideband dual-polarized antenna was designed based on the proposed ring antenna. To achieve two orthogonal linear polarizations with maximum radiation in the direction, two adjacent elements are extracted periodically to feed through one port. The differential feeding network and integrated Baluns have been designed to realize broadside radiation patterns, considering impedance and phase matching. Because the proposed antenna is hollow, it is a good candidate for a multiband sharing aperture antenna element. Results show that the proposed antenna has an overlapped bandwidth of 50.5% (1.04–1.82 GHz) with voltage standing wave ratio (VSWR)<2 for the two polarizations, and port isolation less than 23 dB. The measured realized gain ranges from 6.1 to 8.1 dBi, with stable broadside radiation patterns over the operating frequency band.
Keywords： 环形天线；宽带天线；极化分集；方向图分集
An energy-efficient reconfigurable asymmetric modular cryptographic operation unit for RSA and ECC Research Article
Mengni BIE, Wei LI, Tao CHEN, Longmei NAN, Danyang YANG,raspberry0213@126.com,liwei12@fudan.edu.cn
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 1, Pages 134-144 doi: 10.1631/FITEE.2000325
Keywords： Modular operation unit Reconfigurable High energy efficiency
The Optimization of the Monopulse Antenna Based on Genetic Algorithms
Wang Hongjian,Gao Benqing,Liu Ruixiang
Strategic Study of CAE 2002, Volume 4, Issue 5, Pages 84-87
The sum and difference patterns as well as the directivity of the monopulse antenna arrays are optimized based on genetic algorithms (GA). When only the sum pattern is optimized as usual, the difference pattern and gain can not be guaranteed, so the track precision and effective distance of the antenna or missile will be impaired. However, using GA, the sum pattern, difference pattern and directivity can be optimized thoroughly for the antenna design.
Keywords： monopulse antenna array genetic algorithm pattern directivity
Wide-Angle Scanning Antennas for Millimeter-Wave 5G Applications Article
Raj Mittra, Abdelkhalek Nasri, Ravi Kumar Arya
Engineering 2022, Volume 11, Issue 4, Pages 60-73 doi: 10.1016/j.eng.2021.10.017
The fifth generation (5G) network communication systems operate in the millimeter waves and are expected to provide a much higher data rate in the multi-gigabit range, which is impossible to achieve using current wireless services, including the sub-6 GHz band. In this work, we briefly review several existing designs of millimeter-wave phased arrays for 5G applications, beginning with the low-profile antenna array designs that either are fixed beam or scan the beam only in one plane. We then move on to array systems that offer two-dimensional (2D) scan capability, which is highly desirable for a majority of 5G applications. Next, in the main body of the paper, we discuss two different strategies for designing scanning arrays, both of which circumvent the use of conventional phase shifters to achieve beam scanning. We note that it is highly desirable to search for alternatives to conventional phase shifters in the millimeter-wave range because legacy phase shifters are both lossy and costly; furthermore, alternatives such as active phase shifters, which include radio frequency amplifiers, are both expensive and power-hungry. Given this backdrop, we propose two different antenna systems with potential for the desired 2D scan performance in the millimeter-wave range. The first of these is a Luneburg lens, which is excited either by a 2D waveguide array or by a microstrip patch antenna array to realize 2D scan capability. Next, for second design, we turn to phased-array designs in which the conventional phase shifter is replaced by switchable PIN diodes or varactor diodes, inserted between radiating slots in a waveguide to provide the desired phase shifts for scanning. Finally, we discuss several approaches to enhance the gain of the array by modifying the conventional array configurations. We describe novel techniques for realizing both one-dimensional (1D) and 2D scans by using a reconfigurable metasurface type of panels.Graphical abstractA number of designs for scanning antennas are presented in this work to realize a one- or two-dimensional scan. The first of these is a Luneburg lens, together with a feed array, designed to realize a wide-angle scan The the second design is based on the use of an electronically reconfigurable phase shifter, which utilizes PIN or varactor diodes inserted between radiating slots in a curved waveguide to provide the desired phase shifts. Next, the paper introduces a novel design to realize both one- and two-dimensional scans, by using reconfigurable metasurface type of panels to provide a wide-angle beam-scanning performance, without compromising either the impedance match or the gain of the array. Additionally, the paper describes several techniques for enhancing the gain of the array to achieve gain levels as high as 30 dB, to render the scanning array competitive with reflectors, for instance.Download : Download high-res image (52KB)Download : Download full-size image
Keywords： Luneburg lens Scanning arrays Millimeter-wave antennas Switchable phase shifters Reconfigurable metasurfaces
Zheng Xing Wang, Hanqing Yang, Ruiwen Shao, Jun Wei Wu, Guobiao Liu, Feng Zhai, Qiang Cheng, Tie Jun Cui
Engineering 2022, Volume 17, Issue 10, Pages 64-74 doi: 10.1016/j.eng.2022.03.019
Inspired by the design philosophy of information metasurfaces based on the digital coding concept, a planar 4-bit reconfigurable antenna array with low profile of 0.15 λ0 (where λ0 is the wavelength) is presented. The array is based on a digital coding radiation element consisting of a 1-bit magnetoelectric (ME) dipole and a miniaturized reflection-type phase shifter (RTPS). The proposed 1-bit ME dipole can provide two digital states of “0” and “1” (with 0° and 180° phase responses) over a wide frequency band by individually exciting its two symmetrical feeding ports. The designed RTPS is able to realize a relative phase shift of 173°. By digitally quantizing its phase in the range of 157.5°, additional eight digital states at intervals of 22.5° are obtained. To achieve low sidelobe levels, a 1:16 power divider based on the Taylor line source method is employed to feed the array. A prototype of the proposed 4-bit antenna array has been fabricated and tested, and the experimental results are in good agreement with the simulations. Scanning beams within a ±45° range were measured with a maximum realized gain of 13.4 dBi at 12 GHz. The sidelobe and cross-polarization levels are below –14.3 and –23 dB, respectively. Furthermore, the beam pointing error is within 0.8°, and the 3-dB gain bandwidth of the broadside beam is 25%. Due to its outstanding performance, the array holds potential for significant applications in radar and wireless communication systems.
Keywords： 4-Bit reconfigurable antenna array Information metasurface Digital coding method Low sidelobe Low profile
Qiang LAN, Lin-bo QIAO, Yi-jie WANG
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 6, Pages 755-762 doi: 10.1631/FITEE.1601771
Keywords： Stochastic optimization Graph-guided minimization Extra-gradient method Fused logistic regression Graph-guided regularized logistic regression
A Polarization Programmable Antenna Array Article
Dingzhao Chen, Yanhui Liu, Ming Li, Pan Guo, Zhuo Zeng, Jun Hu, Y. Jay Guo
Engineering 2022, Volume 16, Issue 9, Pages 100-114 doi: 10.1016/j.eng.2022.03.015
Reconfigurable antennas are becoming a major antenna technology for future wireless communications and sensing systems. It is known that, with a single linear polarization (LP) reconfigurable antenna element, a preferred polarization can be produced from a set of multiple polarization states, thus improving the quality of the communication link. This paper presents a new concept of a polarization programmable reconfigurable antenna array that consists of a number of polarization reconfigurable antenna elements with a finite number of possible polarization states. By employing a new optimization strategy and programming the polarization states of all the array elements, we demonstrate that it is possible to realize any desired LP in the vectorial array radiation pattern with accurate control of sidelobe and crosspolarization levels (XPLs), thereby achieving the desired polarization to perfectly match that of the required communications signal. Both numerical and experimental results are provided to prove the concept, and they agree well with each other.
Lin Haoran
Strategic Study of CAE 2003, Volume 5, Issue 3, Pages 27-30
The implementation of proliferation and culture of marine fishes is the fundamental measure and effective avenue for the reasonable and sustainable exploitation of marine fish resources. Therefore, the establishment and development of modern techniques for the proliferation and culture of marine fishes is one of the important research areas in the marine biotechnology. The reproductive physiology and endocrinology, the growth and developmental biology, the immunology and the molecular biology are the theoretical basis of the proliferation and culture in marine fish. Deeply and systematically carrying out basic research and applied research of these disciplines nowadays has become the frontier and major research direction of the science and technology for marine fish.
Keywords： marine fish resource sustainable exploitation proliferation and culture of marine fish science and technology for marine fish marine biotechnology
A Reconfigurable Data Glove for Reconstructing Physical and Virtual Grasps Article
Hangxin Liu,Zeyu Zhang,Ziyuan Jiao,Zhenliang Zhang,Minchen Li,Chenfanfu Jiang,Yixin Zhu,Song-Chun Zhu
Engineering 2024, Volume 32, Issue 1, Pages 203-220 doi: 10.1016/j.eng.2023.01.009
In this work, we present a reconfigurable data glove design to capture different modes of human hand–object interactions, which are critical in training embodied artificial intelligence (AI) agents for fine manipulation tasks. To achieve various downstream tasks with distinct features, our reconfigurable data glove operates in three modes sharing a unified backbone design that reconstructs hand gestures in real time. In the tactile-sensing mode, the glove system aggregates manipulation force via customized force sensors made from a soft and thin piezoresistive material; this design minimizes interference during complex hand movements. The virtual reality (VR) mode enables real-time interaction in a physically plausible fashion: A caging-based approach is devised to determine stable grasps by detecting collision events. Leveraging a state-of-the-art finite element method, the simulation mode collects data on fine-grained four-dimensional manipulation events comprising hand and object motions in three-dimensional space and how the object's physical properties (e.g., stress and energy) change in accordance with manipulation over time. Notably, the glove system presented here is the first to use high-fidelity simulation to investigate the unobservable physical and causal factors behind manipulation actions. In a series of experiments, we characterize our data glove in terms of individual sensors and the overall system. More specifically, we evaluate the system's three modes by ① recording hand gestures and associated forces, ② improving manipulation fluency in VR, and ③ producing realistic simulation effects of various tool uses, respectively. Based on these three modes, our reconfigurable data glove collects and reconstructs fine-grained human grasp data in both physical and virtual environments, thereby opening up new avenues for the learning of manipulation skills for embodied AI agents.
Keywords： Data glove Tactile sensing Virtual reality Physics-based simulation
A highly efficient reconfigurable rotation unit based on an inverse butterfly network Article
Chao MA, Zi-bin DAI, Wei LI, Hai-juan ZANG
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 11, Pages 1784-1794 doi: 10.1631/FITEE.1601265
Keywords： Rotation operations Self-routing Control-bit generation algorithm Inverse butterfly network
Gopi RAM, Durbadal MANDAL, Sakti Prasad GHOSHAL, Rajib KAR
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 4, Pages 570-577 doi: 10.1631/FITEE.1500371
Keywords： Patch antenna Linear antenna array Cat swarm optimization (CSO) Side lobe level (SLL)
Theory and Practice of Hydrodynamic Reconstruction in Plain River Networks Article
Hongwu Tang, Saiyu Yuan, Hao Cao
Engineering 2023, Volume 24, Issue 5, Pages 202-212 doi: 10.1016/j.eng.2022.01.015
The river networks in the plains of China are in low-lying terrain with mild bed slopes and weak hydrodynamics conditions. Filled with intense human activities, these areas are characterized by serious water security problems, e.g., frequent floods, poor water self-purification capabilities, and fragile water ecosystems. In this paper, it’s found that all these problems are related to hydrodynamics, and the spatiotemporal imbalance of river network hydrodynamics is identified as the common cause of these water-related problems. From this, a theory for the hydrodynamic reconstruction of plain river networks is proposed. In addition to the importance of the flow volume, this theory highlights the role of hydrodynamics and limited energy in improving the ecological water environment. The layout of water conservancy project systems (e.g., sluices and pumping stations) is optimized to fully tapping the potential integrative benefit of projects. The optimal temporal and spatial distributions of hydrodynamic patterns is reconstructed in order to meet the needs of the integrated management of complex water-related problems in river networks. On this basis, a complete theoretical method and technical system for multiscale hydrodynamic reconstruction and multi-objective hydraulic regulation in plain river networks with weak hydrodynamics is established. The principles of the integrated management of water problems in river network areas are put forward. The practical application and efficacy of the theory are demonstrated through a case study aiming to improve the water quality of the river network in the main urban area of Yangzhou City.
Keywords： Plain river network Water security problems Hydrodynamic reconstruction Multi-objective Integrated management
Title Author Date Type Operation
Development and application of reconfigurable monitoring and diagnostic system oriented to machine tool
Jing Minqing,Li Meng,Liu Heng
Journal Article
A novel wideband ring antenna for polarization/pattern diversity
Li SUN, Shigang ZHOU, Guanxi ZHANG, Baohua SUN
Journal Article
An energy-efficient reconfigurable asymmetric modular cryptographic operation unit for RSA and ECC
Mengni BIE, Wei LI, Tao CHEN, Longmei NAN, Danyang YANG,raspberry0213@126.com,liwei12@fudan.edu.cn
Journal Article
The Optimization of the Monopulse Antenna Based on Genetic Algorithms
Wang Hongjian,Gao Benqing,Liu Ruixiang
Journal Article
Wide-Angle Scanning Antennas for Millimeter-Wave 5G Applications
Raj Mittra, Abdelkhalek Nasri, Ravi Kumar Arya
Journal Article
A Planar 4-Bit Reconfigurable Antenna Array Based on the Design Philosophy of Information Metasurfaces
Zheng Xing Wang, Hanqing Yang, Ruiwen Shao, Jun Wei Wu, Guobiao Liu, Feng Zhai, Qiang Cheng, Tie Jun Cui
Journal Article
Stochastic extra-gradient based alternating direction methods for graph-guided regularizedminimization
Qiang LAN, Lin-bo QIAO, Yi-jie WANG
Journal Article
A Polarization Programmable Antenna Array
Dingzhao Chen, Yanhui Liu, Ming Li, Pan Guo, Zhuo Zeng, Jun Hu, Y. Jay Guo
Journal Article
The Sustainable Exploitation of Marine Fish Resources and the Research Directions of Science and Technology for Marine Fish
Lin Haoran
Journal Article
A Reconfigurable Data Glove for Reconstructing Physical and Virtual Grasps
Hangxin Liu,Zeyu Zhang,Ziyuan Jiao,Zhenliang Zhang,Minchen Li,Chenfanfu Jiang,Yixin Zhu,Song-Chun Zhu
Journal Article
A highly efficient reconfigurable rotation unit based on an inverse butterfly network
Chao MA, Zi-bin DAI, Wei LI, Hai-juan ZANG
Journal Article
Optimal array factor radiation pattern synthesis for linear antenna array using cat swarm optimization: validation by an electromagnetic simulator
Gopi RAM, Durbadal MANDAL, Sakti Prasad GHOSHAL, Rajib KAR
Journal Article
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