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2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)最新文献

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Time Domain Solutions of Transmission Line Crosstalk 传输线串扰的时域解法
Junyan Wang, T. Jiang, Ruifeng Sun, Yaxiu Sun
This paper uses the Associate Hermite polynomial-finite-difference time-domain method (AH-FDTD) to analyze and calculate the transmission line (TL) crosstalk for the first time. The proposed method expands the transmission line equation using AH basis functions, uses Galekin's principle to eliminate the time variable, solves the implicit equation in the AH domain and performs inverse changes to obtain the solution of the equation. Compared with FDTD, this method separates the spatiotemporal variables, is not constrained by the Courant– Friedrich–Levy (CFL) condition, and has a higher calculation rate when there are many discrete segments of the transmission line. Simulation results show that the proposed method has much lower CPU time and better accuracy compared to FDTD and Alternating Direction Implicit (ADI) FDTD, which has obvious advantages.
本文首次采用关联埃尔米特多项式时域有限差分法(AH-FDTD)对传输线串扰进行了分析计算。该方法利用AH基函数展开传输线方程,利用Galekin原理消去时间变量,在AH域内求解隐式方程,并进行逆变得到方程的解。与时域有限差分法相比,该方法分离了时空变量,不受CFL条件的约束,当传输线有许多离散段时具有更高的计算率。仿真结果表明,与时域有限差分法和交替方向隐式(ADI)时域有限差分法相比,该方法具有更低的CPU时间和更高的精度,具有明显的优势。
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引用次数: 0
A Triple-Band Antenna for Indoor 5G Applications 用于室内5G应用的三波段天线
Mohamed Lamine Seddiki, Saif Eddine Hadji, M. Nedil
In this paper, a Triple-band antenna for 0.7/3.5/28 GHz is proposed and studied for 5G operations. The antenna consists of a folded monopole, C-shaped monopole and four patch arrays to generate three resonant modes for triple-band operation. The folded monopole which is fed by S-shaped strip generates a frequency band at 700 MHz. By couple-feeding of C-shaped monopole through and C-shape strip, a frequency band can be generated at 3.5 GHz. These two elements have an omnidirectional pattern, and they cover the sub-6 GHz band for 5G application. The four patch arrays have a resonance frequency of 28 GHz with a directional radiation pattern. The antenna is designed on a RO-5880 substrate with a total area of 135 mm x 50 mm. Plots of the return loss and radiation pattern have been presented and discussed to show the suitability of the design for 5G applications.
本文提出并研究了一种用于5G业务的0.7/3.5/28 GHz三频段天线。该天线由折叠单极子、c型单极子和四个贴片阵列组成,可产生三种谐振模式,实现三波段工作。折叠单极子由s形带馈电,产生700mhz的频带。通过c形单极通和c形带的耦合馈电,可以产生3.5 GHz的频段。这两个元素具有全向模式,它们覆盖了5G应用的6ghz以下频段。四个贴片阵列的共振频率为28ghz,具有定向辐射方向图。天线设计在RO-5880基板上,总面积为135 mm x 50 mm。给出并讨论了回波损耗和辐射方向图,以表明该设计适合5G应用。
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引用次数: 0
Comparison of the Quadratic U and Inverse Quadratic U Sum-Difference Beampatterns 二次U和反二次U和差波束图的比较
K. Buchanan, Sara Wheeland
This work examines and compares the radiative behavior of the quadratic U and vertically-inverted quadratic U distribution, both unique convex quadratic functions for the application of distributed antenna arrays. The comparison of the two analogous distributions demonstrated that the beamwidth of the random array relies on how the element population is either clustered or dispersed. Furthermore, this behavior occurs for both characteristic modal solutions in which element radiators are used independently to deliver both sum and difference beams. The quadratic U distribution raises sidelobe levels, and its inverse lowers sidelobe levels. By the same token this applies to a tapered aperture distribution where energy is seen to be removed by the mainbeam, increasing sidelobe levels or oppositely lowering sidelobe levels, but increasing mainbeam width. Thus, a trade-off applies to mainbeam width and its corresponding sidelobe levels. Simulated results for the quadratic U and inverted quadratic U with comparison on beamwidth and sidelobe levels conclude this paper.
这项工作检查并比较了二次U和垂直倒二次U分布的辐射行为,这两种分布天线阵列应用的独特凸二次函数。两种类似分布的比较表明,随机阵列的波束宽度依赖于元素种群如何聚集或分散。此外,这一行为发生在两个特征模态解中,其中单元散热器独立使用来传递和梁和差梁。二次U型分布提高了副瓣电平,其逆分布降低了副瓣电平。同样的道理,这也适用于一个锥形孔径分布,其中能量被主波束移除,增加了副瓣电平或相反地降低了副瓣电平,但增加了主波束宽度。因此,对主波束宽度及其相应的旁瓣电平进行权衡。最后给出了二次U型和倒二次U型的仿真结果,并对波束宽度和旁瓣电平进行了比较。
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引用次数: 0
Design of A Wideband Low-Profile Cylindrical Conformal Array Antenna With Flexible Beam Scanning Capability 具有柔性波束扫描能力的宽带低轮廓圆柱共形阵列天线设计
Min Wang, Yang Hu, Zhengchuan Chen
In this paper, a wideband low-profile cylindrical conformal array antenna with flexible beam scanning capability is reported. The design consists of the semi-cylindrical band-pass array antenna and the semi-cylindrical band-stop array antenna, which are connected by radius of R = 31.8 (1.06λo) mm. Based on the frequency selective surface, the profile of band-pass and band-stop element is less than 0.15λo, meanwhile, both have the characteristic of easy to conformal. The band-pass element comprises top and bottom layer of square metallic patch and a middle layer of metallic square-ring slot, and its transmission loss is less than 0.9 dB within 8.0-12.0 GHz. The band-stop element consists of top and bottom square metallic patch, middle metallic square-ring slot loaded with square tube, and its reflection loss is below 1.5 dB within 8.0-12.0 GHz. And a wide-angle of 360° beams scanning is realized, by rotating the spatial position of scanning conformal array. Finally, the simulated results show that the proposed low-profile array antenna have the characteristics of wideband, low-loss, wide-angle beam scanning.
本文报道了一种具有柔性波束扫描能力的宽带低轮廓圆柱共形阵列天线。该设计由半圆柱形带通阵列天线和半圆柱形带阻阵列天线组成,它们以半径R = 31.8 (1.06λo) mm连接,基于频率选择面,带通和带阻元件的轮廓小于0.15λo,同时都具有易于保形的特点。该带通元件由上下两层方形金属贴片和中间层金属方环槽组成,在8.0-12.0 GHz范围内传输损耗小于0.9 dB。该带阻元件由上下两层方形金属贴片、中间金属方环槽加载方管组成,在8.0 ~ 12.0 GHz范围内反射损耗低于1.5 dB。通过旋转扫描共形阵的空间位置,实现了360°广角波束扫描。仿真结果表明,所设计的低轮廓阵列天线具有宽带、低损耗、广角波束扫描的特点。
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引用次数: 0
Reflectarray-based Intelligent Reflecting Surface to Improve mm-Wave 5G coverage in outdoor scenarios 基于反射阵的智能反射面提高毫米波5G户外场景覆盖
Á. F. Vaquero, E. Martinez‐de‐Rioja, M. Arrebola, E. Carrasco, J. Encinar, Safa Salman, M. Achour
This work presents the use of a reflectarray panel as an efficient and low-cost solution to improve millimeter-wave coverage in 5G scenarios. A dual-polarized shaped-beam is designed to radiate a flat-top beam to cover a blind zone without coverage. The design is carried out using a phase-only synthesis considering the beam specifications for the outdoor scenario. Then, a single-layer reflectarray element is used to perform a design at 27.7 GHz. This element provides an angularly-stable phase response at the operational frequency with an independent phase control in each linear polarization. The reflectarray panel shows a stable gain and a low both side-lobe level and cross-polarization within 1 GHz bandwidth.
这项工作提出了使用反射面板作为一种高效、低成本的解决方案,以提高5G场景下毫米波的覆盖范围。双偏振异形光束被设计成辐射平顶光束以覆盖无覆盖的盲区。考虑到室外场景的光束规格,该设计使用纯相位合成进行。然后,采用单层反射元件在27.7 GHz频段进行设计。该元件在工作频率下提供角稳定的相位响应,在每个线偏振中具有独立的相位控制。反射面板显示出稳定的增益,在1ghz带宽内具有较低的副瓣电平和交叉极化。
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引用次数: 1
Efficient Near-Field Meta-Steering Systems for Connectivity-On-The-Move Applications using Hybrid Metasurfaces 使用混合元表面的移动连接应用的高效近场元转向系统
Khushboo Singh, M. Afzal, K. Esselle
In this work we provide an elaborate discussion on Near-Field Meta-Steering systems with hybrid metasurfaces. The steering efficiency of the system is increased by using different types of highly transmitting cells in the design of metasurfaces.
在这项工作中,我们对具有混合元表面的近场元转向系统进行了详细的讨论。在超表面设计中采用不同类型的高发射单元,提高了系统的转向效率。
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引用次数: 1
Low-Frequency-Stabilized Electric Field Integral Equation on Topologically Non-Trivial Geometries for Arbitrary Excitations 任意激励下拓扑非平凡几何的低频稳定电场积分方程
B. Hofmann, T. Eibert, F. Andriulli, S. Adrian
The low-frequency preconditioned electric field integral equation (EFIE) based on quasi-Helmholtz decompositions is widely used to determine the radiated or scattered field by a given structure over a wide frequency range. However, if the excitation source is not a plane wave but, for instance, a line current, the standard preconditioners cannot recover all current components required to accurately obtain the fields. In this work, we propose an adaptive frequency normalization scheme of the discretized system that overcomes this problem irrespective of the specific excitation and irrespective of the underlying topology of the structure. To this end, the appropriate scaling factors are derived solely based on the norms of the right-hand side (RHS) components. Numerical results demonstrate the importance of our approach to obtain accurate results.
基于准亥姆霍兹分解的低频预置电场积分方程(EFIE)被广泛用于确定给定结构在宽频率范围内的辐射或散射场。但是,如果励磁源不是平面波,而是线电流,则标准预调节器无法恢复准确获取场所需的所有电流分量。在这项工作中,我们提出了一种离散系统的自适应频率归一化方案,该方案克服了这个问题,而不考虑特定的激励和结构的底层拓扑结构。为此,仅根据右侧(RHS)分量的规范推导出适当的比例因子。数值结果表明了该方法对获得准确结果的重要性。
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引用次数: 4
Miniaturized Slot MIMO Antenna with Pattern Diversity for CubeSat Applications 用于立方体卫星的带模式分集的小型槽型MIMO天线
R. Hussain, A. S. Rao, A. Aziz, M. U. Khan, S. S. Iqbal, M. Abou-Khousa, M. Sharawi
This work presents a highly miniaturized folded slot-based multiple-input-multiple-output (MIMO) antenna design for Cube Satellites (CubeSats) applications at UHF band with pattern diversity. A novel combination of meandered slot with folded structure and reactively slot loading with a discrete capacitor is used to achieve miniaturization. The antenna can operate over a wide-band from 430 to 510 MHz with pattern diversity over the entire band of operation. The overall board dimensions of the proposed antenna design used are 100×100 mm2. The proposed antenna design is highly suitable for small satellite applications, especially CubeSats.
这项工作提出了一种高度小型化的基于折叠槽的多输入多输出(MIMO)天线设计,用于具有模式分集的UHF波段立方体卫星(CubeSats)应用。为了实现小型化,采用了弯曲槽与折叠结构和离散电容的反应性槽负载的新颖组合。该天线可以在430至510 MHz的宽带上工作,在整个操作频带上具有模式分集。所建议的天线设计的总体板尺寸为100×100 mm2。该天线设计非常适合小型卫星,特别是立方体卫星的应用。
{"title":"Miniaturized Slot MIMO Antenna with Pattern Diversity for CubeSat Applications","authors":"R. Hussain, A. S. Rao, A. Aziz, M. U. Khan, S. S. Iqbal, M. Abou-Khousa, M. Sharawi","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886604","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886604","url":null,"abstract":"This work presents a highly miniaturized folded slot-based multiple-input-multiple-output (MIMO) antenna design for Cube Satellites (CubeSats) applications at UHF band with pattern diversity. A novel combination of meandered slot with folded structure and reactively slot loading with a discrete capacitor is used to achieve miniaturization. The antenna can operate over a wide-band from 430 to 510 MHz with pattern diversity over the entire band of operation. The overall board dimensions of the proposed antenna design used are 100×100 mm2. The proposed antenna design is highly suitable for small satellite applications, especially CubeSats.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116993279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
100-200 MHz sdr-based radio telescope focused on the cosmological study of the Epoch of Reionization 100-200兆赫的基于sdr的射电望远镜专注于再电离时代的宇宙学研究
Felipe P. Mosquera, J. Rodriguez-Ferreira, Efren Acevedo, Oscar Restrepo, G. Chaparro
Radio astronomy as an observational technique used in Astronomy allows experimental validation of theoretical models based on the study of electromagnetic cosmic waves. Technically speaking, uses dedicated instrumentation (radio telescopes) to acquire such signals. The study, base on the emission of 21-cm of neutral hydrogen at frequencies between 100 and 200 MHz, permits to cover a scientific case of open study called Epoch of Reionization (EoR) in which we seek to compare physics models with experimental measurements. This paper presents simulations and measurements of the sub-systems of a 100-200 MHz radiotelescope to establish the feseability to use Software Defined Radio (SDR) technology devices as receptors for low frequency radio telescopes.
射电天文学作为天文学中使用的一种观测技术,可以对基于电磁宇宙波研究的理论模型进行实验验证。从技术上讲,使用专用仪器(射电望远镜)来获取这些信号。这项研究基于在100到200兆赫之间的频率上发射21厘米的中性氢,允许涵盖一个称为再电离时代(EoR)的开放研究的科学案例,在这个研究中,我们试图将物理模型与实验测量进行比较。本文通过对100- 200mhz射电望远镜各子系统的仿真和测量,验证了软件定义无线电(SDR)技术器件作为低频射电望远镜接收机的可行性。
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引用次数: 0
Systematic Design of Metasurface Angular Filters 超表面角滤波器的系统设计
A. Shaham, A. Epstein
We present a systematic methodology for synthesizing metasurface (MS) angular filters, which are beneficial for improving antenna radiation patterns: by deriving a convenient rational-function form for the reflection coefficient, we facilitate efficient and flexible design of such devices. We validate our framework via full-wave simulations by devising all-pass angular filters with tunable phase featuring rigorously designed physical MS inclusions. Our results pave the path towards complete control over the angular response of MSs, from theory to practice.
我们提出了一种系统的方法来合成有利于改善天线辐射方向图的超表面(MS)角滤波器:通过推导反射系数的一种方便的有理函数形式,我们促进了这种器件的高效和灵活的设计。我们通过设计具有严格设计的物理MS内含物的相位可调的全通角滤波器,通过全波模拟验证了我们的框架。我们的结果为从理论到实践完全控制MSs的角响应铺平了道路。
{"title":"Systematic Design of Metasurface Angular Filters","authors":"A. Shaham, A. Epstein","doi":"10.1109/AP-S/USNC-URSI47032.2022.9886240","DOIUrl":"https://doi.org/10.1109/AP-S/USNC-URSI47032.2022.9886240","url":null,"abstract":"We present a systematic methodology for synthesizing metasurface (MS) angular filters, which are beneficial for improving antenna radiation patterns: by deriving a convenient rational-function form for the reflection coefficient, we facilitate efficient and flexible design of such devices. We validate our framework via full-wave simulations by devising all-pass angular filters with tunable phase featuring rigorously designed physical MS inclusions. Our results pave the path towards complete control over the angular response of MSs, from theory to practice.","PeriodicalId":371560,"journal":{"name":"2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117224231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
期刊
2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI)
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