Microwave Finite Element Modeling Applications to Coupled Electromagnetic-Thermal Problems and Characterization of Dielectric Materials
|
|
- Denis Riley
- 5 years ago
- Views:
Transcription
1 Micowave Finite Element Modeling Applications to Coupled Electomagnetic-Themal Poblems and Chaacteization of Dielectic Mateials Hulusi Acikgoz, Yann Le Bihan, Olivie Meye, and Lionel Pichon Laboatoie de Génie Electique de Pais, SUPELEC; UPMC Univesite Pais 6; Univesite Pais Sud-P11, Gif-su-Yvette Cedex, Fance This talk eviews eseach wok caied out in the Laboatoie de Génie Electique de Pais duing the last decade about finite element modeling fo micowave engineeing applications. The fist pat is devoted to coupled electomagnetic-themal poblems. In paticula the micowave heating of dielectic mateial located in a coaxial cell will be pesented. The second pat summaizes ecent wok dedicated to micowave chaacteization of dielectic mateial using a combination of finite element methods and neual netwoks. It is hoped that the mateial of this pape could help to evaluate the potential of the finite element technique fo micowave sinteing. Intoduction Computational methods ae playing an inceasingly impotant ole duing the design step in micowave engineeing. This is the case fo micowave sinteing. In [1,] fo example, the FDTD method was shown to povide an efficient appoach to electomagnetic modeling of multimodal cavities and micowave sinteing. Also in [, 4] the TLM was successfully applied in computational electomagnetics elevant to micowave sinteing. Among the diffeent numeical methods the finite element method is the most flexible. It allows complex geometies to be modeled and easily takes into account inhomogeneous mateials, while poviding an accuate local analysis when solving patial diffeential equations. In this talk we pesent eseach wok achieved duing the last decade in the Laboatoie de Génie Electique de Pais devoted to micowave engineeing applications involving the finite element method. In the fist pat the micowave heating pocess will be consideed. The time hamonic electomagnetic poblem is coupled with the tansient heat equation. The tempeatue dependence of electomagnetic and themal paametes is taken into account. Both bounded and unbounded poblems ae addessed. In the second pat a methodology combining finite elements and neual netwoks is developed in ode to chaacteize dielectic mateials while solving the invese poblem of econstucting pemittivity fom the measued eflection coefficient. Coupled Electomagnetic-Themal Analysis Let us conside a egion Ω containing lossy dielectic mateial and suounded by a bounday Γ. Stating fom the vecto wave equation and using Geen s identity the weak fom of Maxwell s equations in tems of the electic field e can be deived: 9
2 Ω 1 cule.cule d' Ω k ε e.e d' Ω + iωµ µ Ω Γ ( n h).e d' Γ = (1) whee µ is the elative pemeability, k εµ ω ε is the elative pemittivity, ω is the angula fequency and k is the wave numbe ( = ). The diffeent pats of Γ include electic walls (pefectly conducting walls), symmety planes, atificial boundaies suounding the computational domain (in the case of unbounded poblems) and pots (access planes in the case of a micowave cavity). The bounday tem in (1) is detemined on a diffeent pat of Γ accoding to the bounday condition type. In this wok two diffeent types of tangentially continuous elements have been consideed [5]. The tempeatue T of the heated volume V is detemined by solving the heat equation in weak fom: d dt V ρc T dv + p V k gadt.gadϕ dv V T k ϕdγ = n V QϕdV () whee ρ, C p, k, Q ae espectively the density, specific heat capacity, themal conductivity and heat powe density. Convective adiation conditions ae used on the bounday. Equation () is discetized using tetahedal nodal elements of fist ode. Equations (1) and () accounting fo bounday conditions ae solved by iteations. In the heating pocess the tempeatue changes occu much moe slowly than vaiation of the electomagnetic field, so we may assume that the electomagnetic time-hamonic steady state is eached fo each tempeatue distibution. The coupling is taken into account though the dissipated powe density pe unit volume: 1 Q = ωε ε " e () In a fist example [6], the coupled model is used to analyze a shot cicuited standad waveguide containing a lossy dielectic mateial such as a ceamic mateial o foodstuff. The convective bounday condition is applied on the face between ai and dielectic. We suppose that the faces against the waveguide walls ae themally isolated. A typical finite element mesh is shown in Fig.1. Symmety allows us to model only one quate of the stuctue. The same mesh is used fo the themal poblem in the dielectic egion. The cavity is excited by a TE 1 mode at.45 GHz. The electomagnetic and themal popeties of the mateial ae taken fom [7]. The powe geneated by the exciting souce is 1 kwh. The initial tempeatue is 5 C. The convective heat paamete is taken to be constant fo the entie simulation ( h = 5 W / m C ). Fig. shows the evolution of tempeatue in the lossy dielectic medium at diffeent time steps in case of aluminum nitide. The second example consists of a measuement cell used in contolling the micowave pocess fo polyme cuing; it is a potion of a cylindical waveguide shot-cicuited at one end and excited at the othe end by a cicula coaxial cable (Fig. ). This cell belongs to an instumentation that allows dielectic popety measuements (pemittivity, elaxation fequency) 1
3 Fig. 1. Mesh of the dielectic waveguide Fig.. Distibution of the tempeatue in Aluminum Nitide (1/4 th of dielectic) in a boad fequency ange (1 MHz 1 GHz). The sample unde micowave cuing is a mixtue of epoxy esin and hadene. The cell is excited by a TEM mode. Consideing the axial symmety of the stuctue, an axi-symmetic model was developed [8]. It uses the azimuthal component of the magnetic field. To illustate the computation, Fig. 4 shows the evolution of 11
4 Fig.. Coaxial cell Fig. 4. Vaiation of tempeatue vesus time Table 1. Physical Paametes of Tissue Used in the Computation ε C p (J / kg C) ρ (kg / m ) k (W/m C) Fat 7 i.x1 Muscle 5 i4.55 x1.9 x x1.4 tempeatue in the middle of the sample vesus heating time at 44 MHz fo an incident powe of 7 W. The elaxation fequency is also plotted as a compaison: numeical modeling gives some insight into the elationship between the simulated macoscopic tempeatue and the mesoscopic elaxation fequency elated to the behavio of the molecula dipoles. The thid example was studied in ode to test the ability of the coupled electomagnetic model to deal with hypethemia poblems and to addess the case of an unbounded computational egion [9]: a lossy dielectic sphee is illuminated by an incident plane wave with a fequency f = 4MHz (usual hypethemia fequency). It has a adius R =. 6λ ( λ is the wavelength in fee space). This geomety of the sphee was pefeed because in this case analytical solutions exist fo the electomagnetic equation and allowed us to validate the numeical method. The values of the physical paametes ae those of fat and muscle (Table 1). When the micowave souce is switched on (t = ), the tempeatue is the equilibium tempeatue of the human body ( T = 7 C). Due to symmety, only a quate of the sphee is studied. Fig. 5 shows a typical mesh used fo the computation whee ae shown the boundaies of the dielectic egion and the oute bounday located at R =. 45λ. In Fig. 6, we show the computed tempeatue distibution in fat tissue afte 6 s of electomagnetic heating. This distibution fits that of the heating powe. The maximum tempeatue eached is 44.5 C and is located nea the suface of the dielectic sphee. Themal gadients have the highest values in the hot egion. Micowave Dielectic Chaacteization Detemination of dielectic constant and loss facto of dielectic mateials is a difficult poblem. In this pape the chaacteization technique is based on the coaxial cell pesented 1
5 Fig. 5. Typical electomagnetic mesh. Fig. 6. Distibution of tempeatue (6 s). befoe. Nevetheless, fo a coaxial waveguide, the elation between the admittance measued at the discontinuity plane of the waveguide and the complex pemittivity (diect model) can aely be inveted. An altenative is then to use a diect model in an iteative pocedue to educe the diffeence between the calculated admittance and the measued one. Howeve, in many cases an analytical solution does not exist and numeical solutions ae computationally expensive when using an iteative pocedue. In ode to avoid the dawbacks of an iteative pocedue, a moe efficient appoach is to use a paametic model adjusted with a database. A good kind of candidate fo this is atificial neual netwoks (ANNs) since they ae univesal and pasimonious models and can allow fo appoximation of a wide ange of functions povided that they ae peviously tained. The taining consists of adjusting the paametes of the ANNs so that it coectly appoximates the physical behavio of the system. Ou appoach is based on the combination of ANNs and the finite element method [1]. The necessay data sets ae ceated by the finite element method. The inputs of an ANN ae the value of complex impedance (eal pat G, imaginay pat B) and the measuement fequency (f). The output ae the (, ) pais (Fig. 7). The use of ANNs is inteesting since they do not equie analytical solutions and can be implemented without any limitation on the fequency. The fist invesion esults obtained with ANNs (fom 1 MHz to 1.8 GHz) ae compaed with those obtained fom a potocol (SupeMit) used fo micowave chaacteization and having an analytical solution on a wide band of fequency (up to 18 GHz with an APC7 standad). The invese model of this second potocol can be easily obtained by an iteative pocedue using the gadient method (Fig. 8). Conclusion We showed in this pape that the finite element method povides an efficient tool fo dealing with coupled electomagnetic-themal poblems and that a numeical electomagnetic model can be efficiently combined with neual netwoks in ode to solve invese poblems involved in 1
6 Fig. 7. Stuctue of an ANN (Multi-Laye Pecepton) Fig. 8. Reconstuction of the pemittivity of ethanol micowave dielectic chaacteization. Capabilities of the models could be developed in the futue in ode to addess micowave sinteing. Refeences [1] M. F. Iskande, R.L. Smith, A.O.M. Andade, H. Kimey, J., and L.M. Wal, FDTD simulation of micowave sinteing of ceamics in multimode cavities, IEEE Tans. Micowave Theoy and Techn., vol. 4, no. 5, pp. 79-8, [] J. White, M. F. Iskande, and Z. Huang, Development of a multigid FDTD code fo theedimensional applications, IEEE Tans. Antennas and Popag., vol. 45, no. 1, pp , 1997, [] A. Ami and A. Saidane, TLM simulation of micowave hybid sinteing of multiple samples in a multimode cavity, Inten. J. Num. Modelling, vol. 16, no., pp ,. [4] A. Ami and A. Saidane, TLM modelling of micowave sinteing of multiple alumina samples, IEE Poc., Science, Measuement and Technology, vol. 151, no. 4, pp , 4. [5] J. Jin, The Finite Element Method fo Electomagnetics, nd Ed., John Wiley and Sons,. [6] A. Sekkak, L. Pichon, and A. Razek, D FEM magneto-themal analysis in micowave ovens, IEEE Tans. Magnetics, vol., no. 5, pp. 47-5, [7] F.M. Clak, Insulating Mateials fo Design and Engineeing Pactise, John Wiley and Sons, 196. [8] L. Pichon and O. Meye, Coupled themal-electomagnetic simulation of a micowave cuing cell, IEEE Tans. Magnetics, vol. 8, no., pp ,. [9] A. Sekkak A., V.N. Kanellopoulos, L. Pichon, and A. Razek,. An electomagnetic and themal analysis in biological bodies using D FE and absobing bounday conditions, IEEE Tans. Magnetics, vol. 1, no., pp , [1] H. Acikgoz, Y. Le Bihan, O. Meye and L. Pichon, Neual netwoks fo boad-band evaluation of complex pemittivity using a coaxial discontinuity, EPJ Applied Physics Jounal, vol. 9, no., pp. 97-1, 7. 14
Available online at ScienceDirect. Procedia Engineering 100 (2015 )
Available online at www.sciencediect.com ScienceDiect Pocedia Engineeing 1 (215 ) 1 14 25th DAAAM Intenational Symposium on Intelligent Manufactuing and Automation DAAAM 214 Measuement of Complex Pemittivity
More informationDESIGN OF PRINTED DIPOLE ANTENNA AND ITS APPLICATIONS IN UMTS MOBILE COMMUNICATION NETWORKS
DESIGN OF PRINTED DIPOLE ANTENNA AND ITS APPLICATIONS IN UMTS MOBILE COMMUNICATION NETWORKS Buak TOMBALOĞLU, Doğan DİBEKÇİ Kocaeli Univesity, Electonic and Communication Eng. Dept. Kocaeli. e-mail: buak.tombaloglu@tuktelekom.com.t,
More informationExperimental Investigation of Influence on Non-destructive Testing by Form of Eddy Current Sensor Probe
Expeimental Investigation of Influence on Non-destuctive Testing by Fom of Eddy Cuent Senso Pobe Fengyun Xie * and Jihui Zhou School of Mechanical and Electonical Engineeing, East China Jiaotong Univesity,
More informationOptimal Design of Smart Mobile Terminal Antennas for Wireless Communication and Computing Systems
Optimal Design of Smat Mobile Teminal Antennas fo Wieless Communication and Computing Systems Autho Lu, Junwei, Yang, Shiyou Published 2007 Confeence Title 2007 4th Intenational Symposium on Electomagnetic
More informationSchool of Electrical and Computer Engineering, Cornell University. ECE 303: Electromagnetic Fields and Waves. Fall 2007
School of Electical and Compute Engineeing, Conell Univesity ECE 303: Electomagnetic Fields and Waves Fall 007 Homewok 1 Due on Nov. 8, 007 by 5:00 PM Reading Assignments: i) Review the lectue notes. ii)
More informationDesign of A Circularly Polarized E-shaped Patch Antenna with Enhanced Bandwidth for 2.4 GHz WLAN Applications
VNU Jounal of Science: Comp. Science & Com. Eng., Vol. 31, No. 2 (2015) 1-7 Design of A Ciculaly Polaized E-shaped Patch Antenna with Enhanced Bandwidth fo 2.4 GHz WLAN Applications Hong Van Tam 1, Luong
More informationOn Solving TM 0n Modal Excitation in a Ka-Band Overmoded Circular Waveguide by the Conservation of Complex Power Technique
8 JOURNL OF ELECTRONIC SCIENCE ND TECHNOLOGY OF CHIN, VOL. 7, NO., JUNE 9 On Solving TM n Modal Excitation in a Ka-and Ovemoded Cicula Waveguide by the Consevation of Complex Powe Technique Feng Lan, Xi
More informationFigure Geometry for Computing the Antenna Parameters.
Spheical Coodinate Systems Definitions Figue 1.2.1 Geomety fo Computing the Antenna Paametes. Antenna Radiation Patten: The distibution of adiated enegy fom an antenna ove a suface of constant adius centeed
More informationINVESTIGATION OF CLOSE-TO-WALL WIRELESS SENSOR DEPLOYMENT USING 2D FINITE-DIFFERENCE TIME-DOMAIN MODELLING. Y. Wu and I. J.
2 nd Intenational Confeence on Wieless Communications in Undegound and Confined Aeas August 25-27, 2008 Val-d O - Québec - Canada INVESTIGATION OF CLOSE-TO-WALL WIRELESS SENSOR DEPLOYMENT USING 2D FINITE-DIFFERENCE
More informationAntenna fundamentals: With answers to questions and problems (See also Chapter 9 in the textbook.)
adio Technology Metopolia/A. Koivumäki Antenna fundamentals: With answes to questions and poblems (See also Chapte 9 in the textbook.) 1. a) Make up a definition fo the tem "antenna". Answe: One definition:
More informationDevelopment of Corona Ozonizer Using High Voltage Controlling of Produce Ozone Gas for Cleaning in Cage
Moden Envionmental Science and Engineeing (ISSN 333-58) July 07, Volume 3, No. 7, pp. 505-509 Doi: 0.534/mese(333-58)/07.03.07/0 Academic Sta Publishing Company, 07 www.academicsta.us Development of Coona
More informationAnalysis of a Fractal Microstrip Patch Antenna
124 Analysis of a Factal Micostip Patch Antenna Vibha Rani Gupta and Nisha Gupta* Bila Institute of Technology, Mesa, Ranchi-835215, Jhakhand, India. vgupta@bitmesa.ac.in, ngupta@bitmesa.ac.in Abstact-
More informationFeasibility of a triple mode, low SAR material coated antenna for mobile handsets
Loughboough Univesity Institutional Repositoy Feasibility of a tiple mode, low SAR mateial coated antenna fo mobile handsets This item was submitted to Loughboough Univesity's Institutional Repositoy by
More informationDesign of Microstrip Antenna for Wireless Local Area Network
Available Online at www.ijcsmc.com Intenational Jounal of Compute Science and Mobile Computing A Monthly Jounal of Compute Science and Infomation Technology IJCSMC, Vol. 4, Issue. 4, Apil 205, pg.36 365
More informationA New Method of VHF Antenna Gain Measurement Based on the Two-ray Interference Loss
7 nd Intenational Confeence on Atificial Intelligence and Engineeing Applications (AIEA 7) ISBN: 978--6595-485- A New Method of VH Antenna Gain Measuement Based on the Two-ay Intefeence Loss ZHIEI YANG,
More informationInvestigation and Analysis of Inception Voltage and Field Distribution in Power Cables with Internal Cavities in Dielectric
Investigation and Analysis of Inception Voltage and Field Distibution in Powe Cables with Intenal Cavities in Dielectic A. A. Hossam-Eldin Electical Eng. Depatment Faculty of Engineeing Alexandia Univesity,
More informationVTU NOTES QUESTION PAPERS NEWS VTU RESULTS FORUM BOOKSPAR ANDROID APP UNIT-4
NTENN & PROPGTION 6EC6 1EC6 UNIT- Unit : Loop and Hon ntenna: Intoduction, small loop, compaison of fa field of small loop and shot dipole, loop antenna geneal case, fa field pattens of cicula loop, adiation
More informationWIRELESS SENSORS EMBEDDED IN CONCRETE
7th Euopean Wokshop on Stuctual Health Monitoing July 8-11, 2014. La Cité, Nantes, Fance Moe Info at Open Access Database www.ndt.net/?id=17296 WIRELESS SENSORS EMBEDDED IN CONCRETE Amal Abbadi 1 Phd Student,
More informationOptimal Eccentricity of a Low Permittivity Integrated Lens for a High-Gain Beam-Steering Antenna
EuCAP 2011 - Convened Papes Optimal Eccenticity of a Low Pemittivity Integated Lens fo a High-Gain Beam-Steeing Antenna Aki Kattunen #, Juha Ala-Lauinaho #, Ronan Sauleau +, Antti V. Räisänen # # Aalto
More informationJournal of Applied Science and Agriculture
Jounal of Applied Science and Agicultue, 9(16) Octobe 214, Pages: 1-15 AENSI Jounals Jounal of Applied Science and Agicultue ISSN 1816-9112 Jounal home page: www.aensiweb.com/jasa A Design of New Bluetooth
More informationTECHNICAL REPORT: CVEL Maximum Radiated Emission Calculator: Power Bus EMI Algorithm. Chentian Zhu and Dr. Todd Hubing. Clemson University
TECHNICAL REPORT: CVEL-13-053 Maximum Radiated Emission Calculato: Powe Bus EMI Algoithm Chentian Zhu and D. Todd Hubing Clemson Univesity Octobe 12, 2013 Abstact The Maximum Radiated Electomagnetic Emissions
More informationCORNER TRUNCATED MICROSTRIP PATCH ANTENNA
CORNER TRUNCATED MICROSTRIP PATCH ANTENNA Nazia Hasan 1, D.S.C.Gupta 2 1 Student ECE Deptt. UTU Dehadun,Uttaakhand Technical Univesity, Dehadun(India) 2 ECE Deptt. DIT Dehadun,Dehadun Institute of Technology
More information51. IWK Internationales Wissenschaftliches Kolloquium International Scientific Colloquium
51. IWK Intenationales Wissenschaftliches Kolloquium Intenational Scientific Colloquium PROCEEDINGS 11-15 Septembe 26 FACULTY OF ELECTRICAL ENGINEERING AND INFORMATION SCIENCE INFORMATION TECHNOLOGY AND
More informationRealistic Simulation of a Wireless Signal Propagation in an Urban Environment
Realistic Simulation of a Wieless Signal Popagation in an Uban Envionment Keyukuma J. Patel Univesity of Southen Queensland Toowoomba, Austalia e-mail: keyupatel@ieee.og Andew Y. J. Lee Nanyang Technological
More informationSliding Mode Control for Half-Wave Zero Current Switching Quasi-Resonant Buck Converter
Sliding Mode Contol fo Half-Wave Zeo Cuent Switching Quasi-Resonant Buck Convete M. Ahmed, Student membe, IEEE, M. Kuisma, P. Silventoinen Abstact This pape focuses on the pactical implementation of sliding
More informationA Modified Bow Tie Antenna for RFID Application
SEI 9 5 th Intenational Coneence: Sciences o Electonic, echnologies o Inomation and elecommunications Mach -6, 9 UNISIA A Modiied Bow ie Antenna o FID Application Abdelhak FECHICHI*, Noueddine SBOUI* and
More informationGAMMA SHAPED MONOPOLE PATCH ANTENNA FOR TABLET PC
GAMMA SHAPED MONOPOLE PATCH ANTENNA FOR TABLET PC Islam Md. Rafiqul, Mohammad Shawkat Habib and Khaizuan Abdullah Depatment of Electical and Compute Engineeing, Intenational Islamic Univesity Malaysia,
More informationPSO driven RBFNN for design of equilateral triangular microstrip patch antenna
Indian Jounal of Radio & Space Physics Vol. 38, August 009, pp 33-37 PSO diven RBF fo design of equilateal tiangula micostip patch antenna Vidya Saga Chintakindi,$, Shyam Sunda Pattnaik,#,*, O P Bajpai
More informationInternational Journal of Engineering Research-Online A Peer Reviewed International Journal Articles available online
A Pee Reviewed Intenational Jounal Aticles available online http://www.ijoe.in REVIEW ARTICLE ISSN: 2321-7758 GAIN ENHANCEMENT OF MICROSTRIP ANTENNA USING SQUARE ARRAY RAHUL GUPTA 1, BRIJESH DHAKKAR 2,GARIMA
More informationHexagonal Shaped Microstrip Patch Antenna for Satellite and Military Applications
Intenational Jounal of Engineeing and Advanced Technology (IJEAT) ISSN: 49 8958, Volume-7 Issue-5, June 08 Hexagonal Shaped Micostip Patch Antenna fo Satellite and Militay Applications Jayaenjini N, Unni
More informationDesign of FIR Filter using Filter Response Masking Technique
Design of FIR Filte using Filte Response Masking Technique Sandeep Shivastava, Alok Jain, Ram Kuma Soni Abstact- In this pape autho is tying to implement Fequency esponse masking (FRM) technique. In this
More informationwhere and are polynomials with real coefficients and of degrees m and n, respectively. Assume that and have no zero on axis.
function whee is an unknown constant epesents fo the un-modeled dynamics The pape investigates the position contol of electical moto dives that can be configued as stuctue of Fig 1 This poblem is fomulated
More informationJune 2012 Volume 1, Issue 3 Article #07
Scholas www.setscholas.og Knowledge is Powe June 2012 Volume 1, Issue 3 Aticle #07 IJASETR Reseach Pape ISSN: 1839-7239 Modeling of themal adiation in the intenal sections of a Thee-phase AC electical
More informationScienceDirect. Simplified Generation of Electromagnetic Field within EMC Immunity Test Area
Available online at www.sciencediect.com ScienceDiect Pocedia Engineeing 69 ( 014 ) 7 34 4th DAAAM Intenational Symposium on Intelligent Manufactuing and Automation, 013 Simplified Geneation of Electomagnetic
More informationA Gain Measurement in the Liquid Based on Friis Transmission Formula in the Near-Field Region
A Gain Measuement in the Liquid Based on Fiis Tansmission Fomula in the Nea-Field Region # Takuhei Akagawa 1, Nozomu Ishii 2,3, Ken-ichi Sato 4, Lia Hamada 3 and Soichi Watanabe 3 1 Gaduate School of Science
More informationN2-1. The Voltage Source. V = ε ri. The Current Source
DC Cicuit nalysis The simplest cicuits to undestand and analyze ae those that cay diect cuent (DC). n this note we continue ou study of DC cicuits with the topics of DC voltage and cuent souces, the idea
More informationANALYSIS OF CIRCULAR MICROSTRIP ANTENNA ON THICK SUBSTRATE
Jounal of Micowaves and Optoelectonics, Vol., N. o 5, July 00. 30 ANALYSIS OF CIRCULAR MICROSRIP ANENNA ON HICK SUBSRAE A. K. Vema and Nasimuddin Depatment of Electonic Science Univesity of Delhi South
More informationSmall Loop Antenna and Duality Theorem
Small Loop Antenna and Duality Theoem Page 1 Small Loop Antenna and Duality Theoem Having studied the ideal electic dipole we now tun ou attention to an inteesting antenna closely elated to the electic
More informationAnalysis of the optimized low-nonlinearity lateral effect sensing detector
Jounal of hysics: Confeence Seies Analysis of the optimized low-nonlineaity lateal effect sensing detecto To cite this aticle: Saeed Olyaee et al J. hys.: Conf. Se. 76 4 Related content - Neual netwok
More informationNear-field emission prediction of CESAME
Nea-field emission pediction of CESAME E. Sicad, S. Ben Dhia, E. Lamoueux INSA-GEI, 135 Av de Rangueil 31077 Toulouse Fance B. Vignon, L. Couau ST Micoelectonics, Cental R&D Colles, Fance Contact : etienne.sicad@insa-toulouse.f
More informationAnalysis of Dielectric Properties On Agricultural Waste for Microwave Communication Application
MATEC Web of Confeences 140, 01013 (2017) Analysis of Dielectic Popeties On Agicultual Waste fo Micowave Communication Application Nuul Ain Zulkifli 1*, Fwen Hoon Wee 1, Nofadila Mahom 1, Been Seok Yew
More informationHelical Antenna Performance in Wideband Communications
Helical Antenna Pefomance in Wideband Communications Maja Šekelja 1, Zoan Blažević, Maino Maslać 3 1,,3 Univesity of Split, Faculty of Electical Engineeing, Mechanical Engineeing and Naval Achitectue,
More information1 Performance and Cost
Pefomance and Cost Analysis and Reseach of Ai-Cooled Using Small Diamete Coppe Tubes Wu Yang, Li Changsheng and Deng Bin Abstact Replacing coppe tubes with aluminum tubes and using coppe tubes with smalle
More informationEfficient Power Control for Broadcast in Wireless Communication Systems
Efficient Powe Contol fo Boadcast in Wieless Communication Systems A. T. Chonopoulos Compute Science Depatment Univesity of Texas at San Antonio San Antonio, TX Email:atc@cs.utsa.edu P. Cotae Depatment
More informationNear-field Computation and. Uncertainty Estimation using Basic. Cylindrical-Spherical Formulae
Nea-field Computation and Uncetainty Estimation using Basic Cylindical-Spheical Fomulae Poject... IEC 63 Subject... Basic Nea-Field Computation Document numbe... N/A Revision... 3 Autho... F.D. du Plessis
More informationONE-WAY RADAR EQUATION / RF PROPAGATION
ONE-WAY RADAR EQUATION / RF PROPAGATION The one-way (tansmitte to eceive) ada equation is deived in this section. This equation is most commonly used in RWR o ESM type of applications. The following is
More informationOptimization of the law of variation of shunt regulator impedance for Proximity Contactless Smart Card Applications to reduce the loading effect.
Optimization of the law of vaiation of shunt egulato impedance fo Poximity Contactless Smat Cad Applications to educe the loading effect. Catheine Maechal, Dominique Paet. Laboatoie LIT ESIGETEL, ue du
More informationNumerical and Experimental Analysis of Microstrip Antennas Loaded with a Single DNG Resonator
Intenational Jounal of Electomagnetics and Applications 1, (): 6-1 DOI: 1.593/j.ijea.1. Numeical and Expeimental Analysis of Micostip Antennas Loaded with a Single DNG Resonato Fabio Ubani *, Luis D. Quinteo
More informationABSTRACTT FFT FFT-' Proc. of SPIE Vol U-1
Phase econstuction stategies in phase-locking system based on multi-apetue wave font sensos P.A. Semenov, S.D. Pol skikh Shvabe-Reseach, Moscow, Russian Fedeation; e-mail: pite@bk.u ABSTRACTT System of
More informationDesign and Characterization of Conformal Microstrip Antennas Integrated into 3D Orthogonal Woven Fabrics
Design and Chaacteization of Confomal Micostip Antennas Integated into 3D Othogonal Woven Fabics Xin Wang 1, Lan Yao 1, Fujun Xu 2, Dongchun Zhou 1, Yiping Qiu 1 1 College of Textiles, Donghua Univesity,
More informationStudy and Design of Dual Frequency High Gain and Conformal Microstrip Patch Antenna
, pp.236-243 http://dx.doi.og/10.14257/astl.2017.147.33 Study and Design of Dual Fequency High Gain and Confomal Micostip Patch Antenna S. Auna 1, K. Sinivasa Naik 2, J. Ramesh 2 and D. Madhu 2 1 Andha
More informationThis article presents the
A Ciculaly Polaized 6 GHz Micostip Antenna Hee is a mm-wave antenna suitable fo WLAN systems By V. A. Volkov, M. D. Panes Asco, and V. D. Koolkov and R. G. Shifman Resonance This aticle pesents the design
More informationsensors ISSN
Sensos 203, 3, 3652-3663; doi:0.3390/s30303652 Communication OPEN ACCESS sensos ISSN 424-8220 www.mdpi.com/jounal/sensos A Small and Slim Coaxial Pobe fo Single Rice Gain Moistue Sensing Kok Yeow You,
More informationChamber Influence Estimation for Radiated Emission Testing in the Frequency Range of 1 GHz to 18 GHz
Chambe Influence Estimation fo Radiated Emission Testing in the Fequency Range of 1 GHz to 18 GHz Alexande Kiz Electomagnetic Compatibility and RF-Engineeing ARC eibesdof eseach GmbH eibesdof, Austia alexande.kiz@acs.ac.at
More informationSpace Leaky Waves Propagating along a Pair of CRLH SIW Lines
RADIOENGINEERING, VOL. 27, NO. 3, SEPTEMBER 2018 633 Space Leaky Waves Popagating along a Pai of CRLH SIW Lines Rihem NOUMI 1, Jan MACHAC 2, Ali GHARSALLAH 1 1 Dept. of Physics, Faculty of Sciences of
More informationISSN: [Shinde * et al.,6(9): September, 2017] Impact Factor: 4.116
IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY MINIATURIZATION OF MICROSTRIP PATCHANTENNA USING INTERCONNECTED HEXAGONAL RINGS OFDOUBLE NEGATIVE MATERIAL STRUCTURE Juhi Shinde
More informationTri-frequency Microcosmic Fractal Dipole Antenna with PBG Structure Used for 2G, 3G and 4G Systems. Bin LIN 1,*
Intenational Confeence on Compute Netwoks and Communication Technology (CNCT2016) Ti-fequency Micocosmic Factal Dipole Antenna with PBG Stuctue Used fo 2G, 3G and 4G Systems Bin LIN 1,* 1 Xiamen Univesity
More informationWall Compensation for Ultra Wideband Applications
64 A. MUQAIBEL, N. IYA, U. JOHAR, WALL COMPENSATION FOR ULTRA WIDEBAND APPLICATIONS Wall Compensation fo Ulta Wideband Applications Ali H. MUQAIBEL, Nuuddeen M. IYA, Uma M. JOHAR Dept. of Electical Engineeing,
More informationUNCERTAINTY ESTIMATION OF SIZE-OF-SOURCE EFFECT MEASUREMENT FOR 650 NM RADIATION THERMOMETERS
XIX IMEKO Wold Congess Fundamental and Applied Metology Septembe 6 11, 29, Lisbon, Potugal UNCERTAINTY ESTIMATION OF SIZE-OF-SOURCE EFFECT MEASUREMENT FOR 65 NM RADIATION THERMOMETERS Fumihio Sakuma, Laina
More informationDistributive Radiation Characterization Based on the PEEC Method
Title Distibutive Radiation haacteization Based on the PEE Method Autho(s) ao, Y; Jiang, L; Ruehli, AE itation The IEEE Intenational Symposium on Electomagnetic ompatibility (EM), Raleigh, Noth aolina,
More informationOptic Cable Tracking and Positioning Method Based on Distributed Optical Fiber Vibration Sensing
08 5th Intenational Confeence on Electical & Electonics Engineeing and Compute Science (ICEEECS 08) Optic Cable Tacking and Positioning Method Based on Distibuted Optical Fibe Vibation Sensing Zhang Chao,
More informationOptimised Wireless Network Using Smart Mobile Terminal Antenna (SMTA) System
Optimised Wieless Netwok Using Smat Mobile Teminal Antenna (SMTA) System Autho Lu, Junwei, Sciven, Ian, Wate, Wayne Published 2010 Confeence Title Poceedings of IEEE APEMC2010 DOI https://doi.og/10.1109/apemc.2010.5475858
More informationAntenna Miniaturization Based on Supperscattering Effect
512 JING-JING YANG, MING HUANG, FU-CHUN MAO, JING SUN, ANTENNA MINIATURIZATION BASED ON SUPPERSCATTERING Antenna Miniatuiation Based on Suppescatteing Effect Jing-jing YANG, Ming HUANG, Fu-chun MAO, Jing
More informationDiagnosis method of radiated emission from battery management system for electric vehicle
Available online at www.sciencediect.com ScienceDiect Enegy Pocedia 88 (2016 ) 662 667 CUE2015-Applied Enegy Symposium and Summit 2015: Low cabon cities and uban enegy systems Diagnosis method of adiated
More informationKeysight Technologies Basics of Measuring the Dielectric Properties of Materials. Application Note
Keysight Technologies Basics of Measuing the Dielectic Popeties of Mateials Application Note Contents Intoduction...3 Dialetic Theoy...4 Dielectic constant...4 Pemeability...7 Electomagnetic Popagation...8
More informationDESIGN AND PARAMETRIC EVALUATION OF RECTANGULAR MICROSTRIP PATCH ANTENNA FOR GSM APPLICATION
DESIGN AND PARAMETRIC EVALUATION OF RECTANGULAR MICROSTRIP PATCH ANTENNA FOR GSM APPLICATION RAHUL T. DAHATONDE, SHANKAR B. DEOSARKAR Dept. of E & TC, D. Babasaheb Ambedka Technological Univesity, Lonee,
More informationDetermination of The Winding Inductances Of A Two-Phase Machine.
IOSR Jounal of Engineeing (IOSRJEN) ISSN (e): 5-31, ISSN (p): 78-8719 Vol. 5, Issue 4 (Apil. 15), V1 PP 16- www.iosjen.og Detemination of The Winding Inductances Of A Two-Phase Machine. * I.K. Onwuka,
More informationVolume 1, Number 1, 2015 Pages 1-12 Jordan Journal of Electrical Engineering ISSN (Print): , ISSN (Online):
JJEE Volume, Numbe, 5 Pages - Jodan Jounal of Electical Engineeing ISSN (Pint): 49-96, ISSN (Online): 49-969 Discimination between Tansfome Inush Cuent and Intenal Fault using Combined DFT-ANN Appoach
More informationStatement of Works Data Template Version: 4.0 Date:
Statement of Woks Data Template Vesion: 4.0 Date: 16.08.17 This Statement of Woks (SoW) Data Template is to be completed by Distibution Netwok Opeatos (DNOs) in ode to povide National Gid the equied data
More informationPublished in: International Journal of Material Forming. Document Version: Peer reviewed version
A Vitual Inspection Technique fo Assessing the Dimensional Accuacy of Foged Compesso Blades Using FE Modeling and CMM Inspection Makem, J., Ou, H., Amstong, C., Rennie, A., & Nikov, S. (2008). A Vitual
More informationISSN: [Reddy & Rao* et al., 5(12): December, 2016] Impact Factor: 4.116
IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY SIMULATION COMPARISONS OF INDUCTION MOTOR DRIVE WITH ESTIMATOR AND PLL V. Nasi Reddy *, S. Kishnajuna Rao*, S.Nagenda Kuma * Assistant
More informationNew Approach for Optimizing Control of Switched Reluctance Generator
New Appoach fo Optimizing Contol of Switched Reluctance Geneato R. Rebbah, A. Bentounsi and H. Benalla Abstact This pape pesents a new switching appoach that detemines the optimal contol of the Switched
More informationWireless Communication (Subject Code: 7EC3)
COMPUCOM INSTITUTE OF TECHNOLOGY & MANAGEMENT, JAIPUR (DEPARTMENT OF ELECTRONICS & COMMUNICATION) Notes Wieless Communication (Subject Code: 7EC3) Pepaed By: LOKESH KUMAR ARYA Class: B. Tech. IV Yea, VII
More informationParameters of spinning AM reticles
Paametes of spinning AM eticles onald G. Digges, Cal E. Halfod, and Glenn D. Boeman A new method of obtaining amplitude modulation (AM) fo detemining taget location with spinning eticles is pesented. The
More informationMACRO-DIVERSITY VERSUS MICRO-DIVERSITY SYSTEM CAPACITY WITH REALISTIC RECEIVER RFFE MODEL
MACRO-DIVERSITY VERSUS MICRO-DIVERSITY SYSTEM CAACITY WITH REALISTIC RECEIVER RFFE MODEL I Ouachani, Duhamel, K Gosse, S Rouquette-Léveil and D Bateman *Laboatoie des Signaux et Systèmes 3 ue Joliot-Cuie
More informationKey Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, China
Shake Table Test fo Lage Indiect-Ai-Cooling Towe Stuctue of Fie Powe Plant Pat I Junwu DAI, Yongqiang YANG & Xuan WNG Key Laboatoy of athquake ngineeing and ngineeing Vibation, China athquake Administation,
More informationElectrical characterization of thin film ferroelectric capacitors
1 Electical chaacteization of thin film feoelectic capacitos M. P. J. Tiggelman, K. Reimann, M. Klee, D. Beelen, W. Keu, J. Schmitz, and R. J. E. Hueting Abstact Tunable capacitos can be used to facilitate
More informationAnalysis and Design of a 1MHz LLC Resonant Converter with Coreless Transformer Driver
Analysis and Design of a MHz C Resonant Convete with Coeless Tansfome Dive Mingping Mao, Dimita Tchobanov, Dong i 3, Matin Maez.,Tongji Univesity, Siping Rd 39, 9 Shanghai -China., Faunhofe Institute of
More informationERROR ESTIMATIONS IN CYLINDRICAL NEAR FIELD SYSTEM FOR LARGE RADAR ANTENNAS
ERROR ESTIMATIONS IN CYLINDRICAL NEAR FIELD SYSTEM FOR LARGE RADAR ANTENNAS S. Bugos (), F. Matín (), M. Siea-Castañe () and J.L.Besada () () Gupo de Radiación. Dpto. de Señales, Sistemas y Radiocomunicaciones.
More informationA. Ebadi*, M. Mirzaie* and S. A. Gholamian*
A Compaison Between Electical Cicuit and Finite Element Modeling Methods fo Pefomance Analysis of a Thee-Phase nduction Moto unde oltage Unbalance A. Ebadi*, M. Mizaie* and S. A. Gholamian* Abstact: nduction
More informationPerformance Analysis of Z-Source Inverter Considering Inductor Resistance
Pefomance Analysis of Z-Souce Invete Consideing Inducto Resistance Fatma A. Khea * and Essam Eddin M. Rashad ** Electic Powe and Machines Engineeing Depatment, Faculty of Engineeing, anta Univesity, anta,
More information2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media,
2011 IEEE. Pesonal use of this mateial is pemitted. Pemission fom IEEE must be obtained fo all othe uses, in any cuent o futue media, including epinting/epublishing this mateial fo advetising o pomotional
More informationA Study Of a Wide-Angle Scanning Phased Array Based On a High-Impedance Surface Ground Plane
1 A Study Of a Wide-Angle Scanning Phased Aay Based On a High-Impedance Suface Gound Plane Tian Lan, Qiu-Cui Li, Yu-Shen Dou, Xun-Ya Jiang axiv:1901.04895v1 [physics.app-ph] 15 Jan 2019 Abstact This pape
More informationGas Tube Arresters. Certifications, Device Selection Purpose, Operation, Installation Part Number Construction, Part Marking. General Information
Gas Tube Aestes The Potection Poducts Goup of Wold Poducts Inc., specializing in potection poducts fo AC and DC cicuits, is poud to featue a full line of Gas Tube Aestes. Ceamic Gas Tube Aestes povide
More informationDiscrepancies Between Euclidean and Spherical Trigonometry. David Eigen
Discepancies Between Euclidean and Spheical Tigonomety David Eigen 1 Non-Euclidean geomety is geomety that is not based on the postulates of Euclidean geomety. The five postulates of Euclidean geomety
More informationNICKEL RELEASE REGULATIONS, EN 1811:2011 WHAT S NEW?
NICKEL RELEASE REGULATIONS, EN 1811:2011 WHAT S NEW? BACKGROUND: EN 1811 is the intenationally ecognised test method which was devised almost 12 yeas ago to detemine the ate of nickel elease fom jewelley,
More informationA BROADBAND SPECTROSCOPIC SENSOR PROBE
A BROADBAND SPECTROSCOPIC SENSOR PROBE I M Woodhead 1, I Platt, J H Chistie, S Kenek 1 Lincoln Ventues Ltd, Lincoln Univesity Cantebuy, New Zealand. Email: Woodhead@lvl.co.nz Abstact- The electical popeties
More informationProposal of Circuit Breaker Type Disconnector for Surge Protective Device
Poposal of Cicuit Beake Type Disconnecto fo Suge Potective Device MASAO SHIBAYAMA, HITOSHI KIJIMA Polytechnic Univesity 2-32-1 Ogawanishi, Kodaia, Tokyo, 187-0035 JAPAN hkijima@uitec.ac.jp Abstact: - A
More informationAPPLIED ELECTROMAGNETISM
Volume 7 June 05 Numbe (ISSN 09-606) Jounal of APPLIED ELECTROMAGNETISM Institute of Communication and Compute Systems Athens - GREECE Volume 7 June 05 Numbe (ISSN 09-606) JOURNAL OF APPLIED ELECTROMAGNETISM
More informationIMPACT OF DIELECTRIC CONSTANT ON THE DIMENSION OF SQUARE MICROSTRIP PATCH L-BAND ANTENNA
ISSN: 78 7798 Intenational Jounal o Science, Engineeing and Technology Reseach (IJSETR) Volume 6, Issue 1, Januay 17 IMPACT OF DIEECTRIC CONSTANT ON THE DIMENSION OF SQUARE MICROSTRIP PATCH -BAND ANTENNA
More informationComparison of winding topologies in a pot core rotating transformer Smeets, J.P.C.; Encica, L.; Lomonova, E.
Compaison of winding topologies in a pot coe otating tansfome Smeets, J.P.C.; Encica, L.; Lomonova, E. Published in: Poceedings of the 2 2th Intenational Confeence on Optimiation of Electical and Electonic
More informationComparison Between Known Propagation Models Using Least Squares Tuning Algorithm on 5.8 GHz in Amazon Region Cities
106 Compaison Between Known Popagation Models Using Least Squaes Tuning Algoithm on 5.8 GHz in Amazon Region Cities Buno S. L. Casto, Mácio R. Pinheio, Gevásio P. S. Cavalcante Fedeal Univesity of Paá
More informationAbsolute calibration of null correctors using twin computer-generated holograms
Absolute calibation of null coectos using twin compute-geneated hologams Poteep C.V. Mallik a, Rene Zehnde a, James H. Buge a, Alexande Poleshchuk b a College of Optical Sciences, The Univesity of Aizona,
More informationParametric study of retangular patch antenna using denim textile material
Univesidade de São Paulo Biblioteca Digital da Podução Intelectual - BDPI Depatamento de Sistemas Eletônicos - EP/PSI Comunicações em Eventos - EP/PSI 014-03-6 Paametic study of etangula patch antenna
More informationDiscussion #7 Example Problem This problem illustrates how Fourier series are helpful tools for analyzing electronic circuits. Often in electronic
Discussion #7 Example Poblem This poblem illustates how Fouie seies ae helpful tools fo analyzing electonic cicuits. Often in electonic cicuits we need sinusoids of vaious fequencies But we may aleady
More informationDirectivity of an antenna embedded inside a Fabry-Perot cavity: Analysis and design
Diectivity o an antenna embedded inside a Faby-Peot cavity: Analysis and design Halim Boutayeb, Kouoch Mahdjoubi, Anne-Claude Taot, Tayeb Denidni To cite this vesion: Halim Boutayeb, Kouoch Mahdjoubi,
More informationDesign of an LLC Resonant Converter Using Genetic Algorithm
Design of an LLC Resonant Convete Using Genetic Algoithm H. H. Nien, C. K. Huang, S. K. Changchien, C. H Chan Dept. of Electical Engineeing, Chienkuo Technology Univesity E-mail: nien@ctu.edu.tw Dept,
More informationAnalysis of the Radiation Resistance and Gain of Full-Wave Dipole Antenna for Different Feeding Design
Jounal of lectomagnetic Analysis and Applications, 01, 4, 35-4 http://dx.doi.og/10.436/jemaa.01.46033 Published Online June 01 (http://www.scirp.og/jounal/jemaa) 35 Analysis of the Radiation Resistance
More informationMinimizing Ringing and Crosstalk
Minimizing Ringing and Cosstalk By Glen Dash, Ampyx LLC, GlenDash at alum.mit.edu Copyight 1998, 26 Ampyx LLC When viewed on a schematic, a wie is just a wie. Howeve, when isetimes shink to a few nanoseconds
More informationAn Efficient Control Approach for DC-DC Buck-Boost Converter
2016 Published in 4th Intenational Symposium on Innovative Technologies in Engineeing and Science 3-5 Novembe 2016 (ISITES2016 Alanya/Antalya - Tukey) An Efficient Contol Appoach fo DC-DC Buck-Boost Convete
More information