Advanced Electromagnetics最新文献_第3页

Analysis of Arbitrary EM Field Exposure to a Multilayer Spherical Head Model Using Spherical Vector Wave Functions 利用球面矢量波函数分析任意电磁场对多层球头模型的影响

IF 0.8

Advanced Electromagnetics Pub Date : 2023-05-21 DOI: 10.7716/aem.v12i3.1995

M. Alian, N. Noori

{"title":"Analysis of Arbitrary EM Field Exposure to a Multilayer Spherical Head Model Using Spherical Vector Wave Functions","authors":"M. Alian, N. Noori","doi":"10.7716/aem.v12i3.1995","DOIUrl":"https://doi.org/10.7716/aem.v12i3.1995","url":null,"abstract":"A semi-analytical method is presented for the assessment of induced electromagnetic field inside a multilayer head model exposed to radiated field of an arbitrary source antenna. First the source antenna is simulated by a full-wave software in the absence of the head model to evaluate its radiating characteristics. Then, by sampling of the source radiated fields, its spherical vector wave function (SVWF) amplitudes are evaluated. The well-known translation addition theorem for spherical vector wave functions (SVWFs) is implemented to translate radiating field SVWFs to the local coordinates system of head model. Neglecting the reaction of model on source fields, using boundary conditions on the interfaces of adjacent layers, the unknown SVWF amplitudes of the fields inside each layer as well as those of the scattered field outside the head model are evaluated. Some numerical examples are presented for the verification of the proposed method. The acceptable consistency between the results obtained by the proposed method and full-wave simulations of the problem verifies the authenticity of the proposed method. In comparison to a full-wave numerical method, the proposed method provides an efficient repeatable simulation approach due to the independency of the source and head model analyses.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47336668","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

Microstrip Antenna Array Design for Unmanned Aerial Vehicles Detection Radar 无人机探测雷达微带天线阵列设计

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Advanced Electromagnetics Pub Date : 2023-04-16 DOI: 10.7716/aem.v12i3.2066

P. Ruiz, X. Begaud, F. Magne, E. Leder, A. Khy

引用次数: 0

Wideband E-shaped Patch Antennas for Advanced Wireless Terminals 用于高级无线终端的宽带E形贴片天线

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Advanced Electromagnetics Pub Date : 2023-03-20 DOI: 10.7716/aem.v12i2.2191

Yahya Rahmat-Samii, J. Kovitz

引用次数: 1

Electrothermal Analyses of Bandpass NGD RLC-Network Topologies 带通NGD-RLC网络拓扑的电热分析

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Advanced Electromagnetics Pub Date : 2023-03-11 DOI: 10.7716/aem.v12i1.2125

E. Sambatra, S. Ngoho, F. Haddad, M. Guerin, G. Fontgalland, W. Rahajandraibe, B. Ravelo

{"title":"Electrothermal Analyses of Bandpass NGD RLC-Network Topologies","authors":"E. Sambatra, S. Ngoho, F. Haddad, M. Guerin, G. Fontgalland, W. Rahajandraibe, B. Ravelo","doi":"10.7716/aem.v12i1.2125","DOIUrl":"https://doi.org/10.7716/aem.v12i1.2125","url":null,"abstract":"This paper develops an original study of temperature effect on the unfamiliar bandpass (BP) negative group delay (NGD) lumped passive circuits. The paper presents the first study of electrothermal analysis of electronic circuits classified as BP-NGD topologies. The considered BP-NGD passive cells are mainly constituted by RLC-resonant networks. The equivalence between two basic BP-NGD topologies constituted by RLC-series and RLC-parallel networks is elaborated via the voltage transfer function (VTF) analogy. Then, the theoretical demonstrations are introduced to define the main specifications as the NGD center frequency, NGD value, attenuation and NGD bandwidth. The electrothermal innovative study is developed based on the temperature coefficient resistor (TCR) of elements constituting the BP-NGD circuits. With proofs of concept of RLC-series and RLC-parallel circuits operating with -500 ns NGD value at 13.56 MHz, calculated and simulated results showing are in excellent agreement. The sensitivity analyses of BP-NGD specifications in function of ambient temperature variation from 0°C to 100°C are investigated. The BP-NGD response variations versus frequency and temperature are characterized with thermo-frequency cartographies and discussed.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41644392","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 Wideband Fractal MIMO Antenna using Minkowski and Koch Hybrid Curves on Half Octagonal Radiating Patch with High Isolation and Gain for 5G Applications 基于Minkowski和Koch混合曲线的5G高隔离增益半八边形辐射贴片分形天线设计

IF 0.8

Advanced Electromagnetics Pub Date : 2023-03-11 DOI: 10.7716/aem.v12i1.1982

A. K. Sidhu, Jagtar Singh

{"title":"Design of Wideband Fractal MIMO Antenna using Minkowski and Koch Hybrid Curves on Half Octagonal Radiating Patch with High Isolation and Gain for 5G Applications","authors":"A. K. Sidhu, Jagtar Singh","doi":"10.7716/aem.v12i1.1982","DOIUrl":"https://doi.org/10.7716/aem.v12i1.1982","url":null,"abstract":"This article represents a Multiple Input Multiple Output (MIMO) hybrid fractal antenna with wider bandwidth. The hybrid fractal MIMO antenna is created by integrating Minkowski and Koch curves on a half octagonal radiating patch. A wider impedance bandwidth 20.4GHz (1.0 to 21.4GHz) and 6.10GHz (23.9 to 30GHz) along with fractional bandwidth of 182.14% and 22.63% has been achieved by using an amalgamated fractal configuration and a tapered microstrip line feed. The proposed antenna retains high isolation between -20 to -50dB in the entire frequency range along with the DG value greater than 9.99 dB and the ECC less than 0.02. The operating frequency increases from 1.5GHz to 8.5GHz with gain of 8dBi .The gain is almost flat and varies between 4dBi to 7dBi in the frequency range from 8.5GHz to 21.1GHz. Further, in the frequency range from 23.9 to 25.9GHz, the gain rises exponentially to 14dBi Hence, the proposed hybrid fractal MIMO antenna is a proficient candidate for 5G, 3.5GHz band (3.4 – 3.6GHz), 5G NR (New Radio) frequency bands (3.3 – 5.0GHz), LTE band 46 (5.15 – 5.925GHz), EU (European Union) 5G frequency band (5.9 – 6.4GHz), UWB applications (3.1 – 10.6GHz) and 5G 26GHz frequency band.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47385628","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

Design of Wide-Band Microstrip Antenna for S-Band Telemetry Applications s波段遥测应用的宽带微带天线设计

IF 0.8

Advanced Electromagnetics Pub Date : 2023-03-11 DOI: 10.7716/aem.v12i1.2078

Pushpalatha M, Namana N, T. S. Navadagi, Varun D

引用次数: 1

Unified multiconductor transmission-line model of multiple-shields multiconductor cables: evaluation of shield connections performances 多屏蔽多导体电缆的统一多导体传输在线模型:屏蔽连接性能评价

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Advanced Electromagnetics Pub Date : 2023-03-11 DOI: 10.7716/aem.v12i1.1959

J. Parmantier, I. Junqua, M. Ridel, S. Bertuol

{"title":"Unified multiconductor transmission-line model of multiple-shields multiconductor cables: evaluation of shield connections performances","authors":"J. Parmantier, I. Junqua, M. Ridel, S. Bertuol","doi":"10.7716/aem.v12i1.1959","DOIUrl":"https://doi.org/10.7716/aem.v12i1.1959","url":null,"abstract":"This paper presents a transmission-line model of a multiple-shields multiconductor cable. This unified model includes at the same time the propagation and cross-coupling characteristics of the electrical wires and of the cable-shields. It also includes the electromagnetic characteristics of the shields (in terms of transfer impedance and transfer admittance). It is derived in compliance with the multiconductor-transmission-line theory and it is valid whatever the connection configurations at the shield ends are. Therefore, it makes it possible the modelling of realistic connection problems ranging from ideal 360° shield connections to simple bonding wires. In addition, it is suitable for both electromagnetic susceptibility and emission problems. The paper proposes a physical explanation of the derived per-unit-length matrices. This unified model is also used to define the required conditions for being able to calculate the response of a shielded-cable in a two-steps model in which the shield problem and the inner shield problem are solved in sequence. Finally, the paper illustrates an application of the model in order to evaluate performances of a shielded-cable-link on crosstalk configurations with respect to various electrical bonding techniques of the shield.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48387784","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

Taguchi-RBF Neural networks Based Optimization of Phased Array Antenna With Coupling Effects 基于Taguchi-RBF神经网络的耦合相控阵天线优化

IF 0.8

Advanced Electromagnetics Pub Date : 2023-02-23 DOI: 10.7716/aem.v12i1.1988

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

{"title":"Taguchi-RBF Neural networks Based Optimization of Phased Array Antenna With Coupling Effects","authors":"K. Oureghi, R. Ghayoula, W. Amara, A. Smida, I. El Gmati, J. Fattahi","doi":"10.7716/aem.v12i1.1988","DOIUrl":"https://doi.org/10.7716/aem.v12i1.1988","url":null,"abstract":"In the antenna array synthesis problems, most of the works in literature utilize isotropic elements. Thus, the mutual coupling effects between the array elements are neglected. It is obvious that an array antenna synthesized by neglecting the coupling effects cannot be used in the real world applications due to the possible mismatch between the desired and realized radiation patterns. In this paper, a novel method based on neural network algorithm RBF (Radial Basis Function ) for the synthesis and model of Antipodal Vivaldi antenna with mutual coupling effect is presented. The synthesis in implementation’s method for this type of array permits to approach the appropriated radiation pattern while considering the mutual coupling between its elements. The neural network is used to estimate the array elements’ excitations. The architecture of the neural network based on the radial basis functions (RBFs) is introduced and simulation results are presented. Results show that there is an agreement between the desired specifications and the synthesized one. The proposed optimization approach offers an efficient and robust synthesis procedure.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47225430","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

Analysis of higher order Microstrip Filter to Reduce Out-of-Band Emissions 降低带外辐射的高阶微带滤波器分析

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Advanced Electromagnetics Pub Date : 2023-02-12 DOI: 10.7716/aem.v12i1.1693

M. K H, S. Mehta

引用次数: 0

Electromagnetic guided mode resonance in dielectric grating affected by transformation of refractive index periodicity 折射率周期变换对介质光栅电磁导模共振的影响

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Advanced Electromagnetics Pub Date : 2023-02-12 DOI: 10.7716/aem.v12i1.2127

A. Abramov, Y. Yue, V. Rumyantsev

引用次数: 0