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A Hybrid Common Mode Choke Optimization Method for Input Line EMI Filter Design 输入线电磁干扰滤波器设计中的混合共模扼流圈优化方法
IF 0.8
Advanced Electromagnetics Pub Date : 2021-07-31 DOI: 10.7716/aem.v10i2.1677
S. Khelladi, K. Saci, A. Hadjadj, A. Ales
{"title":"A Hybrid Common Mode Choke Optimization Method for Input Line EMI Filter Design","authors":"S. Khelladi, K. Saci, A. Hadjadj, A. Ales","doi":"10.7716/aem.v10i2.1677","DOIUrl":"https://doi.org/10.7716/aem.v10i2.1677","url":null,"abstract":"In this paper, an optimization method of toroidal core-based Hybrid common-mode chokes (HCMCs) for the design of an Electromagnetic interferences (EMI) filter is proposed. A dedicated algorithm is developed using MATLAB to characterize compact HCMCs that exhibit effective CommonMode (CM) chokes with optimized leakage inductances by systematic variations in the winding patterns and geometric dimensions of their magnetic cores. It takes into consideration the physical limitations of these components as well as the constraints related to the design of EMI filters. The proposed algorithm allows through a small computational task to propose a variety of configurations for optimal HCMCs. Finite element method (FEM) simulations are conducted on the HCMCs to extract their CM and leakage inductances. The results are compared with those calculated analytically and yield a good match. The performances of optimized HCMCs are evaluated through their implementation in the designed filter. All the cases of HCMCs including the smallest one allow the EMI filter to easily qualify a power converter to an electromagnetic compatibility (EMC) standard.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43420796","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: 1
Comparative Analysis of Compact Satellite Polarizers Based on a Guide with Diaphragms 基于膜片导向的紧凑型卫星偏振器的比较分析
IF 0.8
Advanced Electromagnetics Pub Date : 2021-07-31 DOI: 10.31219/osf.io/jwu24
S. Piltyay
{"title":"Comparative Analysis of Compact Satellite Polarizers Based on a Guide with Diaphragms","authors":"S. Piltyay","doi":"10.31219/osf.io/jwu24","DOIUrl":"https://doi.org/10.31219/osf.io/jwu24","url":null,"abstract":"In this article we carry out the comparative analysis of new compact satellite polarisers based on a square guide with diaphragms. The main electromagnetic parameters of the developed microwave guide devices with various amount of diaphragms were obtained within the satellite frequency interval from 10.7 GHz to 12.75 GHz. Waveguide polarization converters with different amount of diaphragms from 3 to 5 have been designed and optimized. The main parameters of the presented polarizer were calculated applying the numerical method of finite integration in the frequency domain. Optimization of the electromagnetic parameters of the developed waveguide devices was carried out using the finite elements method in the frequency domain. As a result, sizes of the guide polarizer designs have been optimized for the provision of improved polarization and phase parameters. The performed analysis showed that a waveguide polarizer with five diaphragms has the best electromagnetic parameters. The developed compact polarizer with five diaphragms based on a square guide provides a minimum deviation of the output phase difference from 90 degrees and high level of isolation between linear polarization over the entire operating frequency range. Presented in the article compact waveguide polarization converters can be applied in modern satellite systems, which require efficient polarization transformation and separation of signals.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49486066","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: 21
Cubesat Antenna Analysis and Design: Are you using the right computational electromagnetic tool? Cubesat天线分析与设计：您是否使用了正确的计算电磁工具？
IF 0.8
Advanced Electromagnetics Pub Date : 2021-07-30 DOI: 10.7716/aem.v10i2.1517
I. Latachi, T. Rachidi, M. Karim
{"title":"Cubesat Antenna Analysis and Design: Are you using the right computational electromagnetic tool?","authors":"I. Latachi, T. Rachidi, M. Karim","doi":"10.7716/aem.v10i2.1517","DOIUrl":"https://doi.org/10.7716/aem.v10i2.1517","url":null,"abstract":"Antenna systems play a critical role in establishing wireless communication links and sustaining remote sensing requirements for Cubesat applications. In addition to the usual antenna design requirements, Cubesat-based spacecrafts impose additional stringent constraints related to the on-board available space, power consumption and development costs. To develop optimal antenna prototypes while considering all these constraints and decrease trial and error related costs, computational electromagnetics (CEM) simulation tools are used. The accuracy of simulation results depends to a great extent on the choice of the appropriate CEM tool for the particular antenna problem to be analyzed; ergo, identifying and answering key questions about design objectives and requirements is necessary for informed decision-making throughout the selection and design processes. However, this could be quite challenging because of existing gaps both in the practitioners’ knowledge about different CEM tools capabilities, limitations, and design know-how. This is especially true for non-specialists such as students and academics involved in student driven Cubesat projects. Therefore, the rationale of this manuscript is to bridge those gaps and clarify some common misconception commonly encountered during the selection and design processes. In that regard, first, an overview of existing antenna configurations commonly used in Cubesat communications is provided. Next, antenna design general workflow is presented. Then, capabilities and limitations of different CEM solving methods are presented. After that, CEM software selection process trade-offs and possible sources of errors are discussed from a practical viewpoint. Finally, a case study of Masat-1 antenna system design is presented as practical example.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45115252","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: 1
Exploring microwave absorption by non-periodic metasurfaces 探索非周期超表面的微波吸收
IF 0.8
Advanced Electromagnetics Pub Date : 2021-01-01 DOI: 10.7716/aem.v10i3.1803
J. K. Hamilton, I. Hooper, C. Lawrence
{"title":"Exploring microwave absorption by non-periodic metasurfaces","authors":"J. K. Hamilton, I. Hooper, C. Lawrence","doi":"10.7716/aem.v10i3.1803","DOIUrl":"https://doi.org/10.7716/aem.v10i3.1803","url":null,"abstract":"In recent years there has been a large body of work investigating periodic metasurface microwave absorbers. However, surprisingly few investigations have focused on the absorption performance of similar non-periodic designs. In this work, the electromagnetic response of a large area (310 mm x 310 mm) microwave absorber that lacks a global periodicity is experimentally studied. The top metallic layer of the ultra-thin (0.3 mm) absorber is structured with rectangular patches given by a procedurally generated non-periodic pattern, known as the toothpick sequence. The specular reflectivity of both p-polarised and s-polarised incident radiation shows coupling to an additional low frequency mode when compared to a standard square patch periodic absorber. To further explore the coupling efficiency of such non-periodic absorbers, finite element models were used to investigate the influence of increasing sample size.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71127689","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: 3
Modified Theory of Physical Optics Approach to Diffraction by an Interface between PEMC and Absorbing Half-Planes PEMC与吸收半面交界面衍射的修正物理光学理论
IF 0.8
Advanced Electromagnetics Pub Date : 2021-01-01 DOI: 10.7716/aem.v10i2.1679
Y. Umul
{"title":"Modified Theory of Physical Optics Approach to Diffraction by an Interface between PEMC and Absorbing Half-Planes","authors":"Y. Umul","doi":"10.7716/aem.v10i2.1679","DOIUrl":"https://doi.org/10.7716/aem.v10i2.1679","url":null,"abstract":"The scattering of electromagnetic plane waves by an interface, located between perfect electromagnetic conductor and absorbing half-planes is investigated. The perfect electromagnetic conductor half-plane is divided into perfect electric conductor and perfect magnetic conductor half-screens. The same decomposition is done for the absorbing surface. Then four separate geometries are defined according to this approach. The scattered fields by the four sub-problems are obtained with the aid of the modified theory of physical optics. The resultant scattering integrals are combined in a single expression by using key formulas, defined for the perfect electromagnetic conductor and absorbing surfaces. The scattering integral is asymptotically evaluated for large values of the wave-number and the diffracted and geometric optics fields are obtained. The behaviors of the derived field expressions are analyzed numerically.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71127721","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: 1
A Hybrid GA/GE Beamforming Technique for Side Lobe Cancellation of Linear Antenna Arrays 一种用于线性天线阵旁瓣抵消的混合GA/GE波束形成技术
IF 0.8
Advanced Electromagnetics Pub Date : 2021-01-01 DOI: 10.7716/aem.v10i2.1440
S. I. Abdelrahman, A. Hussein, A. A. Shaalan
{"title":"A Hybrid GA/GE Beamforming Technique for Side Lobe Cancellation of Linear Antenna Arrays","authors":"S. I. Abdelrahman, A. Hussein, A. A. Shaalan","doi":"10.7716/aem.v10i2.1440","DOIUrl":"https://doi.org/10.7716/aem.v10i2.1440","url":null,"abstract":"Side lobe level reduction is one of the most critical research topics in antenna arrays beamforming as it mitigates the interfering and jamming signals. In this paper, a hybrid combination between the Genetic algorithm (GA) optimization technique and the gauss elimination (GE) equation solving technique is utilized for the introduction of the proposed GA/GE beamforming technique for linear antenna arrays. The proposed technique estimates the optimum excitation coefficients and the non-uniform inter-elements spacing for a specific side lobe (SL) cancellation without disturbing the half power beamwidth (HPBW) of the main beam. Different size Chebychev linear antenna arrays are taken as simulation targets. The simulation results revealed the effectiveness of the proposed technique","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":"14 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71127653","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
Summation of Powers in Open Resonator with Slotted Coupling Elements 开槽耦合腔的功率求和
IF 0.8
Advanced Electromagnetics Pub Date : 2021-01-01 DOI: 10.7716/aem.v10i3.1721
I. Kuzmichev, B. I. Muzychishin, Aleksey Y. Popkov
{"title":"Summation of Powers in Open Resonator with Slotted Coupling Elements","authors":"I. Kuzmichev, B. I. Muzychishin, Aleksey Y. Popkov","doi":"10.7716/aem.v10i3.1721","DOIUrl":"https://doi.org/10.7716/aem.v10i3.1721","url":null,"abstract":"The paper analyzes the summation of the powers of two sources in a hemispherical open resonator (OR) during its tuning. The first higher axially asymmetric TEM10q oscillation mode is excited in the resonator. A circuit with an E- tee waveguide is proposed, which makes it possible to research the summation of the powers using a Gunn diode. Studies of the conducting part of the millimeter range have been undertaken. It is shown that the coefficient of powers summation of two sources in the OR using slot coupling elements does not exceed 72%. The use of one H- polarized diffraction grating, which is in the resonator, does not lead to a significant increase in the summation coefficient when moving it. This is due to the excitation of the first type of TEM10q oscillations in the resonator.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71127676","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: 3
On the Effects of Balun on Small Antennas Performance for Animal Health- Monitoring and Tracking Balun对动物健康监测跟踪小型天线性能的影响
IF 0.8
Advanced Electromagnetics Pub Date : 2021-01-01 DOI: 10.7716/aem.v10i2.1691
A. Alemaryeen, S. Noghanian
{"title":"On the Effects of Balun on Small Antennas Performance for Animal Health- Monitoring and Tracking","authors":"A. Alemaryeen, S. Noghanian","doi":"10.7716/aem.v10i2.1691","DOIUrl":"https://doi.org/10.7716/aem.v10i2.1691","url":null,"abstract":"This paper presents the performance evaluation of a sleeve Balun integration in the design of a flexible loop antenna for wildlife health monitoring and tracking applications. To verify the design concept, an experimental antenna is designed, fabricated, and measured in free-space and muscle mimicking phantom. Moreover, investigations are carried out for wearable and implanted antennas in planar and conformal arrangements. In free-space, the antenna is operating within the industrial, scientific, and medical ISM 5.8 GHz band. Balun integration in the antenna design efficiently chokes the currents excited on the outer surface of the feeding cable and provides a good impedance match between antenna and feed line, as demonstrated by simulation and measurement results. On the other hand, in phantom, the antenna has a wide bandwidth characteristic that covers the most used frequency bands for in-body devices. Balun integration, in this case, showed a negligible effect on antenna’s matching properties for two studied implantation depths; 2.5 cm and 5 cm.  The proposed study offers a promising guideline in the design and realization of wearable and implanted antennas.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71127971","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: 1
A Compact Triple Band Antenna for Military Satellite Communication, Radar and Fifth Generation Applications 用于军用卫星通信、雷达和第五代应用的紧凑型三频天线
IF 0.8
Advanced Electromagnetics Pub Date : 2020-12-28 DOI: 10.7716/aem.v9i3.1420
D. El Hadri, A. Zugari, A. Zakriti, M. El Ouahabi, M. Taouzari
{"title":"A Compact Triple Band Antenna for Military Satellite Communication, Radar and Fifth Generation Applications","authors":"D. El Hadri, A. Zugari, A. Zakriti, M. El Ouahabi, M. Taouzari","doi":"10.7716/aem.v9i3.1420","DOIUrl":"https://doi.org/10.7716/aem.v9i3.1420","url":null,"abstract":"A compact triple band antenna by using etching slots technique in the radiation element is presented in this paper. The proposed antenna is designed to target three different frequencies: 7.5 GHz (military satellite communication), 9 GHz (radar applications) and 28 GHz (fifth generation applications). The fabricated prototype of the antenna has overall dimensions of 13x12.8x1.6 mm3. Measurements were carried out to validate the simulation results. The impedance bandwidths are 259 MHz (7.435-7.695 MHz), 355 MHz (8.86-9.221 MHz) and 2.67 GHz (26.79-29.433 GHz) with return loss less than -10 dB. Furthermore, the suggested antenna provides a gain of 3.96 dBi, 3.05 dBi and 5.86 dBi at 7.5 GHz, 9 GHz and 28 GHz respectively. Therefore, the results demonstrate that the proposed triple band antenna can be used for military satellite communication, radar applications and is a good candidate for the future 5G applications.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45849989","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: 8
Isolation Enhancement Using a Hybrid Technique in an Eight-Element UWB MIMO Antenna Design 基于混合技术的八元超宽带MIMO天线隔离增强设计
IF 0.8
Advanced Electromagnetics Pub Date : 2020-12-24 DOI: 10.7716/aem.v9i3.1436
A. Mchbal, N. Touhami, H. Elftouh, A. Dkiouak
{"title":"Isolation Enhancement Using a Hybrid Technique in an Eight-Element UWB MIMO Antenna Design","authors":"A. Mchbal, N. Touhami, H. Elftouh, A. Dkiouak","doi":"10.7716/aem.v9i3.1436","DOIUrl":"https://doi.org/10.7716/aem.v9i3.1436","url":null,"abstract":"A high order multiple input multiple output (MIMO) antenna assembly is designed for Ultra-Wideband (UWB) applications. The antenna configuration is based on a peculiar arrangement of the radiating elements. A defected microstrip structure is also introduced on the feedlines. The use of a novel technique, the so-called ports-shift, is here discussed. In the proposed antenna, a protruded ground branch structure is employed in combination of three parasitic stubs so as to enhance isolation and impedance matching over the UWB frequency band. The results show that the presented antenna exhibits a good impedance matching which is about -10 dB with a high mutual coupling 15 dB, and envelope correlation coefficients (ECC) smaller than 0.15. The antenna also exhibits good diversity gain of about 9.5, and a good efficiency that varied between 56% and 91% and total active reflection coefficient of less than -20 dB. Which makes it a good candidate for UWB applications.","PeriodicalId":44653,"journal":{"name":"Advanced Electromagnetics","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2020-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49091158","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: 1
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