Advanced Electromagnetics最新文献_第2页

Thinned Smart Antenna of a Semi-circular Dipole Array for Massive MIMO Systems 用于大规模多输入多输出系统的半圆偶极子阵列薄型智能天线

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Advanced Electromagnetics Pub Date : 2023-12-09 DOI: 10.7716/aem.v12i4.2303

A. Khan, J. S. Roy

{"title":"Thinned Smart Antenna of a Semi-circular Dipole Array for Massive MIMO Systems","authors":"A. Khan, J. S. Roy","doi":"10.7716/aem.v12i4.2303","DOIUrl":"https://doi.org/10.7716/aem.v12i4.2303","url":null,"abstract":"Massive MIMO (multiple-input multiple-output) is a multi-user MIMO technology that can provide high-speed multimedia services in 5G wireless networks using sub-6 GHz and millimeter wave bands. The massive MIMO (MMIMO) installs array antennas in the base stations, using hundreds of transceivers with other RF modules. One of the drawbacks of the MMIMO system is its huge power consumption, and the beamforming network with RF modules for a large number of antennas is the main contributor to the power consumption. In this paper, a novel beamforming method is proposed for the low power consumption of an MMIMO system. The proposed thinned smart antenna (TSA) of a semi-circular array produces a secure beam toward the user’s terminal with reduced interference. By thinning the antenna array, some of the antenna elements are kept off, resulting in less power consumption, while the array pattern remains the same as a fully populated array with a reduced side lobe level (SLL). The sub-6 GHz band of 5 GHz is used for the design of thinned array antennas. The genetic algorithm (GA) is used to determine the array sequence in thinning, and the adaptive signal processing algorithms least mean square (LMS), recursive least square (RLS), and sample matrix inversion (SMI) are used for the beamforming of the TSA, and the corresponding algorithms are GA-LMS, GA-RLS, and GA-SMI. The power saving of 40% to 55% is achieved using TSA. The maximum SLL reductions of 13 dB, 12 dB, and 14 dB are achieved for TSA using GA-LMS, GA-RLS, and GA-SMI algorithms, respectively.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138586128","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

Design of a Compact Microstrip Filtenna for Miniaturized Devices to Access Internet of Things Using Long Term Evolution 为使用长期演进接入物联网的微型设备设计紧凑型微带天线

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Advanced Electromagnetics Pub Date : 2023-12-08 DOI: 10.7716/aem.v12i4.2111

R. Boddu, A. Deb, J. S. Roy

引用次数: 0

A Multi-Mode Pattern Diverse Microstrip Patch Antenna Having a Constant Gain in the Elevation Plane 一种在仰角面具有恒定增益的多模变型微带贴片天线

Advanced Electromagnetics Pub Date : 2023-11-12 DOI: 10.7716/aem.v12i4.2079

K. Karaçuha, F. T. Çelik, H. I. Helvaci

{"title":"A Multi-Mode Pattern Diverse Microstrip Patch Antenna Having a Constant Gain in the Elevation Plane","authors":"K. Karaçuha, F. T. Çelik, H. I. Helvaci","doi":"10.7716/aem.v12i4.2079","DOIUrl":"https://doi.org/10.7716/aem.v12i4.2079","url":null,"abstract":"This study investigates a multi-mode pattern diverse microstrip patch antenna operating at 2.45 GHz. The study aims to have a flat top gain covering more than 900 in the elevation plane to provide equal service quality to everyone in the region of interest. In order to achieve such a crucial goal, the cavity model approach for the rectangular patches is employed. TM01 and TM02 modes are selected for the design since their corresponding radiation patterns are suitable for scanning a wide range. The superposition of boreside and conical (monopole-like) beams form a wide beam radiation pattern in elevation. Coupling between different modes is reduced by placing two radiators perpendicular to each other. In addition, the design aims to reduce both initial dimensions of the antenna by using fractalization, slotting, and perpendicular positioning techniques. These techniques reduce the original dimension of the design to less than its 60%. The simulation and experimental results reveal many similarities regarding the scattering parameters, radiation patterns, and gain. The scattering parameters, |S11| and |S22| at the operating frequency, are less than -10 dB, and the wide beam radiation pattern (more than 900) is obtained in the elevation plane.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135036604","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

Optical Vivaldi Antenna Array for Solar Energy Harvesting 用于太阳能收集的光学维瓦尔第天线阵列

Advanced Electromagnetics Pub Date : 2023-11-11 DOI: 10.7716/aem.v12i3.2045

W. Amara, J. Rouabeh, R. Ghayoula, A. Hammami, A. Smida, I. El Gmati, A. Ferchichi

{"title":"Optical Vivaldi Antenna Array for Solar Energy Harvesting","authors":"W. Amara, J. Rouabeh, R. Ghayoula, A. Hammami, A. Smida, I. El Gmati, A. Ferchichi","doi":"10.7716/aem.v12i3.2045","DOIUrl":"https://doi.org/10.7716/aem.v12i3.2045","url":null,"abstract":"In this paper, we try to find the best solution for our energy harvesting application by designing an efficient optical antenna which receives the solar radiation and converts it from AC to DC by integrating a rectifier. This work consists of designing a Vivaldi optical antenna with a maximum electric field captured in its gap. We also examine the use the optical array(double, four and eight) in order to increase the captured electric field concentrated in the common gap, compared to the single structure . Feeding lines are used to ride the captured electric field from the gap of each single antenna to a common gap. These innovative systems are small electronic devices often consisting of a low-power computer, wireless sensors, an antenna and capable of communicate with their environment. These devices also have an on-board energy source in the form of cells or batteries that require maintenance operations. periodic replacement or recharging, which can hinder the mobility and deployment of these communicating systems for the greatest number. This is the reason why we Today, we also note the very strong interest in improving energy autonomy and even the complete independence of these systems with respect to on-board sources.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135043209","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

Magnetic Properties and Applications of Glass-coated Ferromagnetic Microwires 玻璃包覆铁磁微线的磁性能及应用

Advanced Electromagnetics Pub Date : 2023-11-10 DOI: 10.7716/aem.v12i3.2240

Arkady Zhukov, P. Corte-León, M. Ipatov, J. M. Blanco, J. Olivera, A. Zhukov

{"title":"Magnetic Properties and Applications of Glass-coated Ferromagnetic Microwires","authors":"Arkady Zhukov, P. Corte-León, M. Ipatov, J. M. Blanco, J. Olivera, A. Zhukov","doi":"10.7716/aem.v12i3.2240","DOIUrl":"https://doi.org/10.7716/aem.v12i3.2240","url":null,"abstract":"A remarkable magnetic softness and giant magnetoimpedance (GMI) effect at GHz frequency range havebeen observed in glass-coated microwires subjected to appropriate postprocessing. Co-based microwires present higher GMI effect. Insulating and flexible glass-coating allows use of magnetically soft amorphous glass-coated microwires for stresses or temperature monitoring insmartcomposites using free space facility. Such composites with magnetic microwire inclusions can present tunable magnetic permittivity. We report on in-situ the evolution of the transmission and reflection parameters of the polymer containing magnetic microwire inclusions during the polymerization process. A remarkable change of the reflection and transmission in the range of 4-7 GHz upon the matrix polymerization is observed. Observed dependencies are discussed in terms of the effect of the temperature and stresses variation on magnetic properties of glass-coated microwires during the thermoset matrix polymerization. Obtained results are considered as a base for novel sensing technique allowing non-destructive and non-contact monitoring of the composites utilizing ferromagnetic glass-coated microwire inclusions with magnetic properties sensitive to tensile stress and temperature.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135087566","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

Phased array antenna controlled by FPGA-ARM Cortex-M Processor 采用FPGA-ARM Cortex-M处理器控制相控阵天线

Advanced Electromagnetics Pub Date : 2023-10-05 DOI: 10.7716/aem.v12i3.2083

W. Amara, R. Ghayoula, A. Hammami, A. Smida, I. El Gmati, J. Fattahi

引用次数: 0

High Isolation Quad-Element SWB-MIMO Antenna with Dual Band-Notch for ISM and WLAN Band Wireless Applications 高隔离四元SWB-MIMO天线，双带陷波，适用于ISM和WLAN波段无线应用

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Advanced Electromagnetics Pub Date : 2023-09-04 DOI: 10.7716/aem.v12i3.2080

G. Saxena, U. Gupta, S. Shukla, U. Shukla, S. Bharti, Yogendra K Awasthi, C. Sanjay, W. A. M. Saif, H. Singh

引用次数: 0

Dual-Band MIMO Antenna with Four CPW Elements using Polarization Diversity for 5G Mobile Communication Networks and Satellite 基于极化分集的5G移动通信网络和卫星四CPW双频MIMO天线

IF 0.8

Advanced Electromagnetics Pub Date : 2023-08-08 DOI: 10.7716/aem.v12i3.2077

Doae El Hadri, A. Zugari, A. Zakriti, M. Ouahabi

引用次数: 0

Low-Loss Super-Wide Band Antenna over Customized Substrate 定制基板上的低损耗超宽带天线

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Advanced Electromagnetics Pub Date : 2023-07-30 DOI: 10.7716/aem.v12i3.2067

S. A. Mohassieb, E. G. Ouf, K. Hussein, M. A. El-Hassan, A. E. Farahat

{"title":"Low-Loss Super-Wide Band Antenna over Customized Substrate","authors":"S. A. Mohassieb, E. G. Ouf, K. Hussein, M. A. El-Hassan, A. E. Farahat","doi":"10.7716/aem.v12i3.2067","DOIUrl":"https://doi.org/10.7716/aem.v12i3.2067","url":null,"abstract":"In this work, a super wide band antenna is proposed to operate in the frequency band 2.3-23 GHz. The antenna has two planar arms with a modified diamond shape printed on the opposite faces of three-layer dielectric substrate. Each arm of the antenna is capacitively coupled to circular sector near its end to increase the impedance matching bandwidth. The dielectric substrate is customized to fit the shape of the antenna arms and the parasitic elements to reduce the dielectric loss. The substrate material is composed of three layers. The upper and lower layers are Rogers RO3003TM of 0.13 mm thickness and the middle layer is made of paper of 2.3 dielectric constant and 2.7 mm thickness. The antenna is fed through a wide band impedance matching balun. The antenna design stages are performed through electromagnetic simulations concerned with the parametric study to get the optimum antenna dimensions to numerically investigate the role of the parasitic element to enhance the antenna performance. A prototype of the proposed antenna is fabricated to validate the simulation results. The experimental measurements come in good agreement with the simulation results and both of them show that the antenna operates efficiently over the frequency band 2.3-23 GHz with minimum radiation efficiency of 97% and maximum gain of 5.2 dBi. The antenna has bandwidth to dimension ratio (BDR) of 1360.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44559568","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

Generation of OAM Beam with High Azimuthal Symmentry through Planar UCA for Vehicular Communication 用于车载通信的平面UCA生成高方位角符号OAM波束

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Advanced Electromagnetics Pub Date : 2023-05-25 DOI: 10.7716/aem.v12i3.2104

Y. Mallikharjuna Reddy, U. V. Ratna Kumari

{"title":"Generation of OAM Beam with High Azimuthal Symmentry through Planar UCA for Vehicular Communication","authors":"Y. Mallikharjuna Reddy, U. V. Ratna Kumari","doi":"10.7716/aem.v12i3.2104","DOIUrl":"https://doi.org/10.7716/aem.v12i3.2104","url":null,"abstract":"In this paper, a uniform circular array (UCA) with circularly polarized (CP) square patches is presented for the generation of orbital angular momentum (OAM) beam with high azimuthal symmetry. The proposed CP UCA is a compact structure with a simple feed network generating OAM beams. The design consists of eight circularly polarized square patch antennas which are geometrically rotated to obtain the required phase distribution. The left hand circularly polarized square patch used as a radiating element in UCA exhibits l = + 1 OAM mode, while the right hand circularly polarized square patch exhibits l = - 1 OAM mode. In addition, the antenna exhibits a single-layer structure, which facilitated the fabrication of the design and reduced the cost as well. The simulated and measured results are reported showing that the antenna exhibits an OAM beam of l = + 1 and l = - 1 modes at 5.85 GHz with high azimuthal symmetry. The mode purity estimation is also reported for the OAM l = + 1 and l = - 1 modes. The gain of the conical shaped OAM beam is almost 11 dBi which makes it quite viable for applications in wireless and vehicular communications.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49651436","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