Applied Computational Electromagnetics Society Journal最新文献_第3页

Complementary SRR-Based Reflector to Enhance Microstrip Antenna Performance 基于互补srr的反射器提高微带天线性能

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360620

M. Ucar

{"title":"Complementary SRR-Based Reflector to Enhance Microstrip Antenna Performance","authors":"M. Ucar","doi":"10.47037/2020.aces.j.360620","DOIUrl":"https://doi.org/10.47037/2020.aces.j.360620","url":null,"abstract":"In this paper, complementary split ring resonator (SRR) based reflector to enhance the printed slot dipole (PSD) antenna performance is introduced. The numerically calculated return-loss, directivity and radiation pattern results of the PSD antenna, with (w/) and without (w/o) CSRR element etched on reflector plane are presented and investigated. Numerical analysis and modelling of the proposed design are carried out using CST Microwave Studio simulator based on the finite integration technique. According to the simulation results, with the inclusion of the CSRR-based reflector into the PSD antenna, the directivity is increased by values changes from 0.6 dB to 4.25 dB through the\u0000operation band, while an improvement in bandwidth (~2.1%) is seen. It is also shown that this improvement in antenna performance is due to the -negative (ENG) behavior of CSRR structures. Prototype of the proposed antenna is fabricated using Arlon DiClad 880 substrate with electrical permittivity ofεr= 2.2. A quite good agreement between simulation and measurement is obtained. In this study, it is shown that the radiation\u0000performance of the antenna can be increased easily by using the CSRR element as a reflector in the antenna structure with a new enhancement approach. Also, the proposed antenna with a compact size of 0.27λ× 0.41λ is appropriate for operating in IEEE 802.11b/g/n/ax (2.4 GHz) WLAN applications.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"23 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89656435","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

The Behavior of Electromagnetic Wave Propagation in Photonic Crystals with or without a Defect 电磁波在有缺陷或无缺陷光子晶体中的传播行为

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360603

A. Basmaci

{"title":"The Behavior of Electromagnetic Wave Propagation in Photonic Crystals with or without a Defect","authors":"A. Basmaci","doi":"10.47037/2020.aces.j.360603","DOIUrl":"https://doi.org/10.47037/2020.aces.j.360603","url":null,"abstract":"In this study, the electromagnetic wave propagation behavior of two-dimensional photonic crystal plates with a defect is investigated. For this purpose, the partial differential equation for the electromagnetic wave propagation in various photonic\u0000crystal plates containing a defect or not is obtained by using Maxwell’s equations. The defect is also defined in the electromagnetic wave propagation equation appropriately. In order to solve the electromagnetic wave propagation equation, the finite differences method is used. The material property parameters of the photonic crystal plates are determined with respect to the defects. Accordingly, the effects of material property parameters on electromagnetic wave propagation frequencies, phase velocities, and group velocities are examined. The effects of the size and position of the defects on the\u0000electromagnetic wave propagation frequencies are also discussed. The highest electromagnetic wave propagation fundamental frequency value obtained from the analyses performed is 1.198 Hz. This fundamental frequency value is obtained for the electromagnetic wave propagation in the t-shaped photonic crystal plate. Electromagnetic field distribution maps for the fundamental frequencies of the photonic crystal plates whose electromagnetic wave propagation behaviors are examined are obtained with the ANSYS package program based on the finite differences time-domain\u0000(FDTD) method.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"18 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76110229","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

Compact 2x2 and 4x4 MIMO Antenna Systems for 5G Automotive Applications 用于5G汽车应用的紧凑型2x2和4x4 MIMO天线系统

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360619

Mohamed O. Khalifa, A. Yacoub, D. Aloi

引用次数: 0

Modeling the Microwave Transmissivity of Row Crops 行作物微波透过率的建模

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360624

Jeil Park, P. Gurrala, B. Hornbuckle, Jiming Song

引用次数: 0

Compact Dual-Passband Three-Dimensional FSS with Good Angular Stability and Both-Side Fast Roll-Off Characteristics 紧凑的双通带三维FSS，具有良好的角稳定性和两侧快速滚转特性

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360607

Zhengyong Yu, Li Baozhu, Shenggao Ding, Wanchun Tang

{"title":"Compact Dual-Passband Three-Dimensional FSS with Good Angular Stability and Both-Side Fast Roll-Off Characteristics","authors":"Zhengyong Yu, Li Baozhu, Shenggao Ding, Wanchun Tang","doi":"10.47037/2020.aces.j.360607","DOIUrl":"https://doi.org/10.47037/2020.aces.j.360607","url":null,"abstract":"A compact dual-passband three-dimensional (3D) frequency selective surface (FSS) is proposed based on multiple square coaxial waveguides (SCWs), which exhibits good angular stability and both-side fast roll-off characteristics. The unit cell of the proposed 3D FSS is composed of one parallel plate waveguide (PPW) propagation path and two SCW propagation paths. By etching a centered annular slot, each SCW path forms two identical short SCWs. Each short SCW inherently generates one square slot resonance. In each SCW path, on the account of electromagnetic coupling between two square slot resonators provided by two short SCWs, the square slot resonant mode will split into even-/odd-resonant modes. Accordingly, each SCW path can provide a flat second-order passband with two transmission poles. Due to the reflection and out of phase of electromagnetic waves, four transmission zeros located at both sides of the passbands are introduced for high frequency selectivity, realizing both-side fast roll-off performances. In order to explain the operating principle, the electric-field distributions at transmission-zero/pole frequencies are investigated. Finally, an FSS prototype is fabricated and measured, and the results exhibit good angular stability for both TE and TM polarizations under incident angles from 0° to 60°. In addition, the proposed 3D FSS\u0000has a compact unit cell.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"45 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85678994","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

A Modified Hybrid Integral Equation to Electromagnetic Scattering from Composite PEC-Dielectric Objects Containing Closed-Open PEC Junctions 含闭开PEC结的复合PEC-介电物体电磁散射的修正混合积分方程

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360604

Jinbo Liu, Hongyang Chen, Hui Zhang, Jin Yuan, Zengrui Li

{"title":"A Modified Hybrid Integral Equation to Electromagnetic Scattering from Composite PEC-Dielectric Objects Containing Closed-Open PEC Junctions","authors":"Jinbo Liu, Hongyang Chen, Hui Zhang, Jin Yuan, Zengrui Li","doi":"10.47037/2020.aces.j.360604","DOIUrl":"https://doi.org/10.47037/2020.aces.j.360604","url":null,"abstract":"To efficiently analyze the electromagnetic scattering from composite perfect electric conductor (PEC)-dielectric objects with coexisting closed-open PEC junctions, a modified hybrid integral equation (HIE) is established as the surface integral equation (SIE) part of the volume surface integral equation (VSIE), which employs the combined field integral equation (CFIE) and the electric field integral equation (EFIE) on the closed\u0000and open PEC surfaces, respectively. Different from the traditional HIE modeled for the objects whose closed and open PEC surfaces are strictly separate, the modified HIE can be applied to the objects containing closed-open junctions. A matrix equation is obtained by using the Galerkin’s method of moments (MoM), which is augmented with the spherical harmonics expansion-based multilevel fast multipole algorithm (SE-MLFMA), improved by the mixed-potential representation and the triangle/tetrahedron-based grouping scheme. Because in the improved SE-MLFMA, the memory usage for\u0000storing the radiation patterns of basis functions is independent of the SIE type in the VSIE, it is highly appropriate for the fast solution of the VSIE that contains the HIE. Various numerical experiments demonstrate that during the calculation of composite objects containing closed-open PEC junctions, the application of the modified HIE in the VSIE can give reliable results with fast convergence speed.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"119 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75044579","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

Design of Microstrip Parallel-Coupled Lines with High Directivity using Symmetric-Centered Inductors 利用对称中心电感设计高指向性微带平行耦合线

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360606

Somchat Sonasang, N. Angkawisittpan

引用次数: 5

Gain Enhancement Planar Lens Antenna based on Wideband Focusing Gradient Meta-surface 基于宽带聚焦梯度元曲面的增益增强平面透镜天线

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360605

Qiming Yu, Shaobin Liu, Zhengyu Huang, X. Kong, Huang Yuehong, Yongdiao Wen

引用次数: 1

Improved Thevenin Equivalent Model of MMC Considering Pre-charge Conditions and DC Side Fault Conditions 考虑预充条件和直流侧故障条件的MMC改进Thevenin等效模型

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360622

Jin Enshu, Zhenyu Song, Y. Xiaofan, Yu Xin

引用次数: 1

Broadband CPW-Fed Circularly Polarized Square Slot Antenna for Universal UHF RFID Handheld Reader 用于通用UHF RFID手持阅读器的宽带cpw馈电圆极化方槽天线

IF 0.7 4区计算机科学

Applied Computational Electromagnetics Society Journal Pub Date : 2021-08-06 DOI: 10.47037/2020.aces.j.360617

Rui Ma, Q. Feng

{"title":"Broadband CPW-Fed Circularly Polarized Square Slot Antenna for Universal UHF RFID Handheld Reader","authors":"Rui Ma, Q. Feng","doi":"10.47037/2020.aces.j.360617","DOIUrl":"https://doi.org/10.47037/2020.aces.j.360617","url":null,"abstract":"This paper presents a new coplanar waveguide (CPW)-fed circularly polarized square slot\u0000antenna (CPSSA). The proposed antenna uses an inverted Z-shaped feedline protruded from the signal line of the feeding CPW. Circularly polarized (CP) radiation can be achieved by adequately inserting the arc-shaped grounded strip into the upper right corner of the square slot. The widened vertical tuning stub on the L-shaped grounded strip can improve impedance matching and axial ratio (AR) performance. The measured results indicate that the 10 dB impedance bandwidth is 620 MHz (652-1272 MHz), and the 3 dB axial ratio bandwidth is 320 MHz (840-1160 MHz), which has a broadband characteristic. In the range of the universal UHF RFID band, the measured peak gain is about 4.4 dBi. The proposed CPSSA uses low-cost FR4 material as the dielectric substrate. The overall size of the antenna is 119 × 119 × 0.5 mm3. The proposed antenna has a simple structure, easy processing, good performance, wide operating bandwidth, and dual circular polarization characteristic. It can be applied to the universal UHF RFID handheld reader environment.","PeriodicalId":8207,"journal":{"name":"Applied Computational Electromagnetics Society Journal","volume":"29 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83269235","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