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Novel Methodology to Assess RF Performance of Co-located MIMO Radar Systems Transmitting Binary Phased Coded Waveforms 一种评估同址MIMO雷达系统传输二相编码波形射频性能的新方法
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360823
N. Colon-Diaz, D. Janning, Patrick M. McCormick, J. Aberle, D. Bliss
{"title":"Novel Methodology to Assess RF Performance of Co-located MIMO Radar Systems Transmitting Binary Phased Coded Waveforms","authors":"N. Colon-Diaz, D. Janning, Patrick M. McCormick, J. Aberle, D. Bliss","doi":"10.47037/2021.aces.j.360823","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360823","url":null,"abstract":"─ In this work an experimental radar testbed and dual directional couplers (DDC) are used to collect measurements of the forward and reverse waves at each element, its mutual coupling, and beam-patterns. The collected measured data is used to validate a methodology for assessing radio frequency (RF) performance of a co-located multiple-input multipleoutput (MIMO) radar system transmitting binary phased coded (BP) waveforms. The estimated and measured active reflection coefficient (ARC) and beam-patterns are presented. The effect of different excitations and mutual coupling on the radiated fields is also presented. Index Terms ─ Active reflection coefficient, co-located MIMO radar, coupled power, mutual coupling.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"8 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87433955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Central-Symmetry Decoupling Technique for Circularly-Polarized MIMO System of Tightly Packed Chinese-character Shaped Patch Antennas 紧密排列贴片天线圆极化MIMO系统的中心对称解耦技术
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.36091
K. Chung, Aiqi Cui, Mingliang Ma, Botao Feng, Yingsong Li
{"title":"Central-Symmetry Decoupling Technique for Circularly-Polarized MIMO System of Tightly Packed Chinese-character Shaped Patch Antennas","authors":"K. Chung, Aiqi Cui, Mingliang Ma, Botao Feng, Yingsong Li","doi":"10.47037/2021.aces.j.36091","DOIUrl":"https://doi.org/10.47037/2021.aces.j.36091","url":null,"abstract":"─ This article presents a novel decoupling technique for the circularly polarized multiple-inputmultiple-output (CP-MIMO) system composed of Guoshaped patch antennas. A comparative study has been conducted on antenna performance as a function of packing distance before and after applying the technique. A prototype of two-element Guo-shaped patch MIMO at a small inter-element spacing of 12.5 mm has devised aiming for the 5G new radio n38 (2.57-2.62 GHz) applications. Simulation reinforced with experimental results confirmed the effectiveness of the proposed technique, whereas the two Guo-shaped patch elements packed in such small spacing can be operated independently. Both the envelope correlation coefficient and diversity gain are approaching their ideal values. Index Terms ─ Antenna isolation, artistic patch antenna, Chinese-character-shaped patch antenna, CP-MIMO, decoupling technique.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"26 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86969239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
A Novel Multidirectional Strain Sensor Realized by a 3D Microstrip-Line Fed Near-Circular Patch Antenna 用三维微带线馈电近圆贴片天线实现的新型多向应变传感器
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360917
Lingling Wang, K. Chung, Song Gao, Mingliang Ma, Jianlin Luo, Yingsong Li
{"title":"A Novel Multidirectional Strain Sensor Realized by a 3D Microstrip-Line Fed Near-Circular Patch Antenna","authors":"Lingling Wang, K. Chung, Song Gao, Mingliang Ma, Jianlin Luo, Yingsong Li","doi":"10.47037/2021.aces.j.360917","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360917","url":null,"abstract":"─ In this paper, we propose a newly developed impedance method to gauge the variations of multidirectional strain using a near-circular-patch based sensor. A novel three-dimensional (3D) feeding mechanism realized by a 90-deg bended microstrip line is devised for allowing strain detection along any direction in the azimuth plane of a metallic surface. The simulated results, verified by experimental results, demonstrate that there is a linear relationship between normalized impedance and multi-directional strain with high sensitivities of about 100 ppm/με. The relationship between sensitivity and sensor orientation is derived as a cosine function, which is a useful feature for estimating principal strain direction. Index Terms ─ 3D feeding mechanism, multidirectional strain monitoring, near-circular-patch, strain sensor.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"13 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75604844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Low-Profile Dual-Polarized Antenna with High Isolation and High Front-to-Back Ratio for 5G Base Stations 面向5G基站的高隔离、高前后比的低轮廓双极化天线
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360916
M. Çiydem
{"title":"A Low-Profile Dual-Polarized Antenna with High Isolation and High Front-to-Back Ratio for 5G Base Stations","authors":"M. Çiydem","doi":"10.47037/2021.aces.j.360916","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360916","url":null,"abstract":"─ A dual-polarized, broadband, slot-coupled patch antenna design is presented for sub-6 GHz 5G base stations. Proposed antenna is made up of two suspended stacked patches above feedline layer and is excited by crossed elliptic-H slots for ±45o slant, linear dual polarized operation. Prototyped antenna has an impedance bandwidth of 22.1% (3.14 3.92 GHz) for S11, S22 < −15 dB and port isolation S21 is also obtained to be < −28 dB in this band. Antenna exhibits directional radiation patterns with half power beamwidths of 57o 65o and 60o 64o in elevation and azimuth planes, respectively with varying gain of 8.6 9.1 dBi. Proposed antenna is also low profile (11.1 mm) with high front-toback ratio (> 27 dB) without reflector. Design details, numerical studies, and measurement results are presented. Index Terms ─ Dual-polarized, broadband antenna, isolation, front-to-back ratio, sub-6 GHz 5G base stations.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"73 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83715329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reduction of Cogging Torque in AFPM Machine Using Elliptical-Trapezoidal-Shaped Permanent Magnet 椭圆-梯形永磁体减小AFPM电机齿槽转矩
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360819
S. Ali, J. Ikram, C. Devereux, S. Bukhari, S. Khan, N. Khan, J. Ro
{"title":"Reduction of Cogging Torque in AFPM Machine Using Elliptical-Trapezoidal-Shaped Permanent Magnet","authors":"S. Ali, J. Ikram, C. Devereux, S. Bukhari, S. Khan, N. Khan, J. Ro","doi":"10.47037/2021.aces.j.360819","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360819","url":null,"abstract":"─ The reduction in cogging torque enables smooth operation and an increase in the torque density of the machine. This research aims to minimize cogging torque in dual rotor single stator axial flux permanent magnet (AFPM) machine. Reduction in cogging torque makes the back EMF sinusoidal and reduces the torque ripples in AFPM machine. In this paper, an elliptical trapezoidal-shaped permanent magnet (PM) is proposed to minimize torque ripples of the AFPM machine. The 3D finite element analysis (FEA) is used for the analysis of AFPM machine. The optimization of AFPM machine is done by employing the asymmetric magnet-overhang along with the parameters of elliptical-shaped PM using Genetic algorithm (GA). Index Terms ─ Axial flux machine, cogging torque, elliptical-trapezoidal magnet, FEA, slot-less, torque ripples.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"89 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81461763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Ultra-wideband Transmissive Linear Polarization Device Based on Graphene 基于石墨烯的超宽带透射线性偏振器件
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360714
Liwei Guo, Simin Li, Xing Jiang, Xin Liao, Lin Peng
{"title":"Ultra-wideband Transmissive Linear Polarization Device Based on Graphene","authors":"Liwei Guo, Simin Li, Xing Jiang, Xin Liao, Lin Peng","doi":"10.47037/2021.aces.j.360714","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360714","url":null,"abstract":"In order to achieve both adjustable wideband and high Polarization Conversion Rate (PCR) of the transmitted waves, a novelty tri-layered structure is proposed for terahertz applications. The Rhombus Hollow Square (RHS) is built up by top and bottom gold gratings on Silicon Dioxide and Polyamide substrate with graphene strips. The proposed polarizer broadens the bandwidth and has well performance. As chemical potential increases, the bandwidth is also broadened by adjusting the graphene. From 0.5 THz to 3 THz, the PCR is greater than 90%, and the relative bandwidth up to 142.9%. The transmission and absorption of polarizer are analyzed at the oblique incidence with chemical potential 0.1eV. By simulating and analyzing the performance, a new result of maintaining broadband and high transmittance in oblique incidence is obtained.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"56 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83388398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Accurate Far-Field Measurement of Wide-Angle Scanning Phased Array Antennas 广角扫描相控阵天线的精确远场测量
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360915
H. Tang, Xianbao Zheng
{"title":"Accurate Far-Field Measurement of Wide-Angle Scanning Phased Array Antennas","authors":"H. Tang, Xianbao Zheng","doi":"10.47037/2021.aces.j.360915","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360915","url":null,"abstract":"─ This paper presents a new approach to the accurate determination of the far-field (FF) pattern of wide-angle scanning phased array antennas (PAAs) that uses planar near-field (NF) technology. When PAAs are engaged in wide-angle scanning, a finite scanning plane and inaccurate probe compensation can lead to truncation errors. The proposed approach reduces these by rotating the PAA to make its main beam perpendicular to the scanning plane. To verify the effectiveness of the approach, both theoretical calculations and actual measurements were undertaken. The simulated and measured results prove that the proposed method is more accurate than traditional NF technology for a large PAA scanning angle, such as ψ0=50° and Δ0=50° (in simulation; 54° when measured). Index Terms ─ Antenna measurement, planar near-field technology, wide-angle scanning phased array antenna.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"84 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83418525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ultra-wideband Flexible Implantable Antenna for Wireless Capsule Endoscopy System with Performance Improvement 改进无线胶囊内窥镜系统的超宽带柔性植入式天线
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2020.aces.j.360618
Yang Feng, Pan Chen, Shaopeng Pan, Gaosheng Li
{"title":"Ultra-wideband Flexible Implantable Antenna for Wireless Capsule Endoscopy System with Performance Improvement","authors":"Yang Feng, Pan Chen, Shaopeng Pan, Gaosheng Li","doi":"10.47037/2020.aces.j.360618","DOIUrl":"https://doi.org/10.47037/2020.aces.j.360618","url":null,"abstract":"The implantable antenna is an important part of the wireless capsule endoscopy (WCE) system to achieve wireless communication. This paper designed an ultra-wideband flexible implantable antenna for wireless capsule endoscopy system. With a very wide bandwidth, the antenna can completely cover the industrial, scientific, and medical frequency bands (ISM, 2.4-2.48 GHz) and Wireless Medical Telemetry Service (WMTS, 1.395-1.4 GHz). The expanded size of the proposed antenna is 18mm× 10mm× 0.1mm. The conformal technology of the antenna has further reduced the space of the system and achieved miniaturization. The capsule antenna in this paper is a compact planar monopole antenna fed by a coplanar waveguide, and it uses a flexible material as a dielectric substrate to achieve the conformal shape of the antenna. U-shaped ground branch (UGB) and a loaded split ring resonator (SRR) structure were used to further improve the antenna performance. Simulation and measurement results were basically the same. On the premise of radiation safety and miniaturization of the antenna, the ultra-wideband operation of the antenna was realized. This antenna design provided reference value for the design and application of the capsule antenna.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"2 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90552134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tunable Terahertz Plasmon-Induced Transparency in Resonator-Coupled Dirac Semimetal Waveguides 谐振腔耦合狄拉克半金属波导中可调谐太赫兹等离子体诱导的透明度
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2020.aces.j.360609
Daobin Wang, Jiahuan Yang, Wen Wang, Li-hua Yuan, Xiaoxiao Li
{"title":"Tunable Terahertz Plasmon-Induced Transparency in Resonator-Coupled Dirac Semimetal Waveguides","authors":"Daobin Wang, Jiahuan Yang, Wen Wang, Li-hua Yuan, Xiaoxiao Li","doi":"10.47037/2020.aces.j.360609","DOIUrl":"https://doi.org/10.47037/2020.aces.j.360609","url":null,"abstract":"The bulk Dirac semimetal (BDS) is an interesting material, similar to graphene, which can dynamically adjust its optical properties via a variation in its Fermi energy or electrical voltage. In this work, a BDS-based plasmonic device, which enables tunable terahertz plasmon-induced transparency, was proposed and designed. By using the finite element method, the surface plasmon polariton and plasmon-induced transparency of this device were systematically investigated. The results demonstrate that the plasmon-induced transparency of such device can be dynamically tuned by varying its Fermi energy. When the Fermi energy changes from 55 meV to 95 meV, the maximum group delay time of the device increases from 13.2 ps to 21 ps. In the case of a cascading device, the maximum group delay time can be further pushed up to 44.57 ps. The influence of the ambient refractive index on the optical properties of the proposed device was also considered and investigated.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"35 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89481079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Compact High Gain Multiband Antenna Based on Split Ring Resonator and Inverted F Slots for 5G Industry Applications 5G工业应用中基于分环谐振器和倒F槽的紧凑型高增益多频段天线
IF 0.7 4区 计算机科学
Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI: 10.47037/2021.aces.j.360808
Ranjan Mishra, Rajeev Dandotiya, Ankush Kapoor, P. Kumar
{"title":"Compact High Gain Multiband Antenna Based on Split Ring Resonator and Inverted F Slots for 5G Industry Applications","authors":"Ranjan Mishra, Rajeev Dandotiya, Ankush Kapoor, P. Kumar","doi":"10.47037/2021.aces.j.360808","DOIUrl":"https://doi.org/10.47037/2021.aces.j.360808","url":null,"abstract":"─ This paper presents the design, optimization, fabrication, and measurement of the compact high gain microstrip antenna with a split ring resonator and set of inverted-F slots along with a matching stub for sub-6 GHz5G applications. In this investigation, different iterations are visualized by incorporating inverted F slots, a split ring resonator, and a matching stub in the transmission line. The advantages of each incorporated structure are analyzed, and a hybrid antenna consisting of the combination is proposed as a final antenna configuration with the optimum results. The proposed final design attains compactness and multi-band operation. Impedance matching is improved by using the stub matched technique at the feed line. The designed antenna shows the resonances at precisely 2.1 GHz, 3.3 GHz, and 4.1GHz. The proposed antenna is suitable for mobile cellular communication such as the LTE band (2.1 GHz), n78 band (3.3 GHz), and n77 band (4.1 GHz) of 5G bands. The gain retrieved from each band attains more than 5 dB value. Index Terms ─ Fifth generation (5G), inverted F-slot, Split Ring Resonator (SRR), stub matching.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"36 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73865807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
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