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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
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.
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
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
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
Integrated communication and localization in millimeter-wave systems
Jie Yang, Jing Xu, Xiao Li, Shi Jin, Bo Gao,yangjie@seu.edu.cn,shadowaccountxj@foxmail.com,li_xiao@seu.edu.cn,jinshi@seu.edu.cn,gao.bo1@zte.com.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 457-470 doi: 10.1631/FITEE.2000505
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
Recent Advances in Space-Deployable Structures in China
Xiaofei Ma, Tuanjie Li, Jingya Ma, Zhiyi Wang, Chuang Shi, Shikun Zheng, Qifeng Cui, Xiao Li, Fan Liu, Hongwei Guo, Liwu Liu, Zuowei Wang, Yang Li
Engineering 2022, Volume 17, Issue 10, Pages 207-219 doi: 10.1016/j.eng.2022.04.013
Deployable space structure technology is an approach used in building spacecraft, especially when realizing deployment and folding functions. Once in orbit, the structures are released from the fairing, deployed, and positioned. With the development of communication, remote-sensing, and navigation satellites, space-deployable structures have become cutting-edge research topics in space science and technology. This paper summarizes the current research status and development trend of spacedeployable structures in China, including large space mesh antennas, space solar arrays, and deployable structures and mechanisms for deep-space exploration. Critical technologies of space-deployable structures are addressed from the perspectives of deployable mechanisms, cable-membrane form-finding, dynamic analysis, reliable environmental adaptability analysis, and validation. Finally, future technology developments and trends are elucidated in the fields of mesh antennas, solar arrays, deployable mechanisms, and on-orbit adjustment, assembly, and construction.
Keywords： Deployable space structures Mesh antennas Solar arrays Deep-space exploration
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
Filtering antennas: from innovative concepts to industrial applications Review Articles
Yun-fei CAO, Yao ZHANG, Xiu-yin ZHANG
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 1, Pages 116-127 doi: 10.1631/FITEE.1900474
Keywords： Filtering antenna Dual-band Antenna array
Study on Extension Strategic Tactical Planning
Yang Chunyan,Zhang Yongjun
Strategic Study of CAE 2002, Volume 4, Issue 10, Pages 73-78
Extension Strategic Tactics Planning (ESTP), based upon the science of extenics, is established along a perspective of solving contradictory problems. In this paper, the fundamental thoughts, theories and methods of ESTP are introduced concisely. The highlights of the paper are that the techniques, used in case of contradiction to tackle such problems as how to generate the ideas of strategic tactical planning, how to completely analyze the resources, how to exploit extension resources, how to transfer the incompatible into the compatible, and how to transfer the opposite into the co-existent, are developed in a formalized way. And regarding ESTP's practice，the applications of ESTP in resource integration, project, product innovation market development, and crisis prevention and handling are introduced.
Keywords： extension strategic tactical planning contradictory problem extension method idea generation extension resource
The Research of Mining the Mutative Knowledge With Extension Data Mining
Chen Wenwei
Strategic Study of CAE 2006, Volume 8, Issue 11, Pages 70-73
The thesis standardized the extension information and the extension knowledge, that is, basing on the information and knowledge, the thesis extended the mutative information and knowledge, and nailed down the conceptions of extension data mining and extension reasoning. This thesis also attested two theorems of the extension data mining and the formula of the extension reasoning. The author put forward the extension data mining which extended from mining the static knowledge to mining the mutative knowledge. So it exploited a new aspect of data mining, and illuminated it by examples.
Keywords： extension information extension knowledge extension data mining extension reasoning
Title Author Date Type Operation
A Polarization Programmable Antenna Array
Dingzhao Chen, Yanhui Liu, Ming Li, Pan Guo, Zhuo Zeng, Jun Hu, Y. Jay Guo
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
Development and application of reconfigurable monitoring and diagnostic system oriented to machine tool
Jing Minqing,Li Meng,Liu Heng
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
Integrated communication and localization in millimeter-wave systems
Jie Yang, Jing Xu, Xiao Li, Shi Jin, Bo Gao,yangjie@seu.edu.cn,shadowaccountxj@foxmail.com,li_xiao@seu.edu.cn,jinshi@seu.edu.cn,gao.bo1@zte.com.cn
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
Recent Advances in Space-Deployable Structures in China
Xiaofei Ma, Tuanjie Li, Jingya Ma, Zhiyi Wang, Chuang Shi, Shikun Zheng, Qifeng Cui, Xiao Li, Fan Liu, Hongwei Guo, Liwu Liu, Zuowei Wang, Yang Li
Journal Article
Theory and Practice of Hydrodynamic Reconstruction in Plain River Networks
Hongwu Tang, Saiyu Yuan, Hao Cao
Journal Article
Filtering antennas: from innovative concepts to industrial applications
Yun-fei CAO, Yao ZHANG, Xiu-yin ZHANG
Journal Article
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