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A Compact Dual-Frequency Base-Station Dipole Array With Amc Reflector, Min Li, Lijun Jiang
A Compact Dual-Frequency Base-Station Dipole Array With Amc Reflector, Min Li, Lijun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
A compact dual-frequency dipole array is presented for use in base stations operating in the Digital Cellular System (DCS) and Wideband Code Division Multiple Access (WCDMA) bands. The size-miniaturization is realized by utilizing band notch dipole (BND) as array element and artificial magnetic conductor (AMC) as array reflector for reductions in array width and profile height, respectively. Simulation results show that good impedance matching, high antenna isolation, and good radiation performances are achieved simultaneously.
Simulation Study Of 4h-Sic Trench Mosfets With Various Gate Structures, Jheng Yi Jiang, Chih Fang Huang, Tian Li Wu, Feng Zhao
Simulation Study Of 4h-Sic Trench Mosfets With Various Gate Structures, Jheng Yi Jiang, Chih Fang Huang, Tian Li Wu, Feng Zhao
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, we systematically study the effect of gate structures of a 4H-SiC UMOSFET on its performance, focusing on the fast-switching performance. Based on the simulation results, DC and AC characteristics of different gate structures are compared. It is found that a structure of UMOSFET, combining a grounded split-gate (SG), a trench bottom protection P+ shielding layer (PS) and a current spreading layer (CSL), yields the best compromise.
Ultra-Lightweight Mutual Authentication Protocol With Substitution Operation, Al Salour, Douglas D. Trimble, Jagannathan Sarangapani, Eyad S. Taqieddin
Ultra-Lightweight Mutual Authentication Protocol With Substitution Operation, Al Salour, Douglas D. Trimble, Jagannathan Sarangapani, Eyad S. Taqieddin
Electrical and Computer Engineering Faculty Research & Creative Works
A method comprises using at least one of a reader and a passive tag to exchange values according to an ultra-lightweight mutual authentication protocol with a substitution operation to change a Hamming weight of the values.
Graphene Based Functional Devices: A Short Review, Rong Wang, Xin Gang Ren, Ze Yan, Li (Lijun) Jun Jiang, Wei E.I. Sha, Guang Cun Shan
Graphene Based Functional Devices: A Short Review, Rong Wang, Xin Gang Ren, Ze Yan, Li (Lijun) Jun Jiang, Wei E.I. Sha, Guang Cun Shan
Electrical and Computer Engineering Faculty Research & Creative Works
Graphene is an ideal 2D material system bridging electronic and photonic devices. It also breaks the fundamental speed and size limits by electronics and photonics, respectively. Graphene offers multiple functions of signal transmission, emission, modulation, and detection in a broad band, high speed, compact size, and low loss. Here, we have a brief view of graphene based functional devices at microwave, terahertz, and optical frequencies. Their fundamental physics and computational models were discussed as well.
Random Subspace Projection For Predicting Biogeographical Ancestry, Tanjin Toma, Tayo Olufemi-Ajayi, Jeremy Dawson, Donald Adjeroh
Random Subspace Projection For Predicting Biogeographical Ancestry, Tanjin Toma, Tayo Olufemi-Ajayi, Jeremy Dawson, Donald Adjeroh
Electrical and Computer Engineering Faculty Research & Creative Works
Human biogeographical ancestry estimation using genomic information is an important problem with applications in population stratification, admixture mapping, forensic ancestry inference, and in healthcare. Various studies have proposed panels of ancestry informative single nucleotide polymorphisms (SNPs) for distinguishing between widely separated continental populations. There has been limited investigation on identifying SNP panels for sub-continental ancestry prediction, especially given the difficult challenge of identifying SNP markers to distinguish closely associated sub-populations, for instance, within a continent. In this study, we propose an ancestry informative SNP selection algorithm exploiting the concept of random subspace projection using supervised learning. The proposed approach identifies …
3-Dimensional Path Planning For Autonomous Underwater Vehicle, Yiheng Wang, Yahong Rosa Zheng
3-Dimensional Path Planning For Autonomous Underwater Vehicle, Yiheng Wang, Yahong Rosa Zheng
Electrical and Computer Engineering Faculty Research & Creative Works
This paper proposes a new algorithm for Autonomous Underwater Vehicle (AUV) path planning in 3D space to visit multiple targets using Dubins curves. For a given target-sequence, the 3D path planning is usually solved by two steps: Step 1 projects 3D targets to the X-Y plane and designs a 2D path on this plane; Step 2 maps the 2D path into 3D via interpolation. The proposed new algorithm defines a local coordinate system (LCS) for each pair of targets and designs the 2D Dubins curve in the LCS, then uses the Euler's rotation transformation to convert the 2D dubins curve …
Machine-Learning-Based Pml For The Fdtd Method, He Ming Yao, Lijun Jiang
Machine-Learning-Based Pml For The Fdtd Method, He Ming Yao, Lijun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
In this letter, a novel absorbing boundary condition (ABC) computation method for finite-difference time-domain (FDTD) is proposed based on the machine learning approach. The hyperbolic tangent basis function (HTBF) neural network is introduced to replace traditional perfectly matched layer (PML) ABC during the FDTD solving process. The field data on the interface of conventional PML are employed to train HTBF-based PML model. Compared to the conventional approach, the novel method greatly decreases the size of a computation domain and the computation complexity of FDTD because the new model only involves the one-cell boundary layer. Numerical examples are provided to benchmark …
Temperature Dependent Thermoelectric Properties Of Cuprous Delafossite Oxides, Yining Feng, Aline Elquist, Yuepeng Zhang, Kaizhong Gao, Ian Ferguson, Athanasios Tzempelikos, Na Lu
Temperature Dependent Thermoelectric Properties Of Cuprous Delafossite Oxides, Yining Feng, Aline Elquist, Yuepeng Zhang, Kaizhong Gao, Ian Ferguson, Athanasios Tzempelikos, Na Lu
Electrical and Computer Engineering Faculty Research & Creative Works
The use of nanostructured delafossite oxides in thermoelectric (TE) applications has attracted a great interest due to their high performance and long-term stability at elevated temperatures. Cuprous delafossites, CuMO2 (M = Al, Cr, Fe, Ga, Mn), compared to conventional TE materials, such as Bi2Te3, PbTe and SiGe, are non-toxic and more earth abundant. In particular, CuAlO2 compound shows a great potential for high performance thermoelectric materials. In this work, a systematic study of temperature dependent TE properties of cuprous delafossite materials, CuAlO2, is reported. The optimization of the TE properties has been …
A Compact Single-Element Pattern Reconfigurable Antenna With Wide-Angle Scanning Tuned By A Single Varactor, Haozhan Tian, Lijun Jiang, Tatsuo Itoh
A Compact Single-Element Pattern Reconfigurable Antenna With Wide-Angle Scanning Tuned By A Single Varactor, Haozhan Tian, Lijun Jiang, Tatsuo Itoh
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, we propose a convenient fixed-frequency beam steering method, using a single patch antenna controlled by only one electronically tunable component. The antenna is based on coupled-mode patch antenna (CMPA) [1] that is capable to scan the beam as the function of frequency. A ground-etched slot loaded with one varactor diode is tuned to be capacitive, resonant, or inductive. In order to test broader tuning range, two kinds of varactors with the ranges of 9.24 pF-1.77 pF and 2.67 pF-0.63 pF are implemented respectively. By analyzing how the loaded slot affects the cavity modes and fields, we demonstrate …
Applying Deep Learning Approach To The Far-Field Subwavelength Imaging Based On Near-Field Resonant Metalens At Microwave Frequencies, He Ming Yao, Min Li, Lijun Jiang
Applying Deep Learning Approach To The Far-Field Subwavelength Imaging Based On Near-Field Resonant Metalens At Microwave Frequencies, He Ming Yao, Min Li, Lijun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
In this paper, we utilize the deep learning approach for the subwavelength imaging in far-field, which is realized by the near-field resonant metalens at microwave frequencies. The resonating metalens consisting of split-ring resonators (SRRs) are equipped with the strong magnetic coupling ability and can convert evanescent waves into propagating waves using the localized resonant modes. The propagating waves in the far-field are utilized as the input of a trained deep convolutional neural network (CNN) to realize the imaging. The training data for establishing the deep CNN are obtained by the EM simulation tool. Besides, the white Gaussian noise is added …
Corrigendum To ‘Zinc Oxide As An Active N-Layer And Antireflection Coating For Silicon Based Heterojunction Solar Cell’ [Sol. Energy Mater. Sol. Cells 139 (2015) 95–100](S0927024815001324)(10.1016/J.Solmat.2015.03.017), Babar Hussain, Abasifreke Ebong, Ian Ferguson
Corrigendum To ‘Zinc Oxide As An Active N-Layer And Antireflection Coating For Silicon Based Heterojunction Solar Cell’ [Sol. Energy Mater. Sol. Cells 139 (2015) 95–100](S0927024815001324)(10.1016/J.Solmat.2015.03.017), Babar Hussain, Abasifreke Ebong, Ian Ferguson
Electrical and Computer Engineering Faculty Research & Creative Works
The authors regret that permanent email address of the corresponding author is "[email protected]". The authors would like to apologize for any inconvenience caused.
Theory Of Potential-Based Integral-Form A-Φ Formulation In Electromagnetic Applications, Qin S. Liu, Li (Lijun) Jun Jiang, Sheng Sun, Qi Dai, Weng Cho Chew
Theory Of Potential-Based Integral-Form A-Φ Formulation In Electromagnetic Applications, Qin S. Liu, Li (Lijun) Jun Jiang, Sheng Sun, Qi Dai, Weng Cho Chew
Electrical and Computer Engineering Faculty Research & Creative Works
Recent progress on the theory of potential-based A-φ formulationin the integral form and its electromagnetic applications are summarized and presented here. By using Lorenz gauge and solving the vector and scalar potential formulations in tandem, the A-φ formulationac-curately captures the correct physics of both electrostatics and magnetostatics. The wide-band stable, dense-discretization breakdown free and structure-independent solver provides an alternative solution to various electromagnetic scattering and circuital problems. Also, the A-φformulationis applied to solve the characteristic modes at low frequencies.
Orbital Angular Momentum Generation Using Composite Quasi-Continuous Metasurfaces With Perfect Efficiency, Menglin L.N. Chen, Li (Lijun) Jun Jiang
Orbital Angular Momentum Generation Using Composite Quasi-Continuous Metasurfaces With Perfect Efficiency, Menglin L.N. Chen, Li (Lijun) Jun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
A composite perfect electric conductor (PEC)-perfect magnetic conductor (PMC) metasurface is proposed for orbital angular momentum (OAM) generation. Each scatterer on the metasurface consists of an anisotropic PEC layer and an isotropic PMC layer. Unlike conventional metasurfaces that composed of discrete scatterers, the scatterers on the proposed metasurface form a quasi-continuous pattern. Therefore, negative consequences of periodicity breaking from the patterned scatterers with varying sizes or orientations and their mutual coupling are avoided. We model the scatterer using Jones matrix. Its design is based on the features of PEC and PMC, which abandons complicated optimization process. The patterning of scatterers …
Numerical Modeling Of Graphene Nano-Ribbon By Dgtd Taking Into Account The Spatial Dispersion Effects, Ping Li, L. (Lijun) J. Jiang, H. Baǧci
Numerical Modeling Of Graphene Nano-Ribbon By Dgtd Taking Into Account The Spatial Dispersion Effects, Ping Li, L. (Lijun) J. Jiang, H. Baǧci
Electrical and Computer Engineering Faculty Research & Creative Works
It is well known that graphene demonstrates spatial dispersion properties [1]-[3], i.e., its conductivity is nonlocal and a function of spectral wave number (momentum operator) q. In this work, to fully account for effects of spatial dispersion on transmission of high-speed signals along graphene nanoribbon (GNR) interconnects, a discontinuous Galerkin time-domain (DGTD) algorithm is proposed. The atomically thick GNR is modeled using a nonlocal transparent surface impedance boundary condition (SIBC) [4] incorporated into the DGTD scheme. Since the conductivity is a complicated function of q (and one cannot find an analytical Fourier transform pair between q and spatial differential operators), …
On-Demand Band-Rejected Wideband Antenna Based On Peelable Resonator Membrane, Rong Wang, Min Li, Salahuddin Raju, Robert C. Roberts, Mansun Chan, Lijun Jiang
On-Demand Band-Rejected Wideband Antenna Based On Peelable Resonator Membrane, Rong Wang, Min Li, Salahuddin Raju, Robert C. Roberts, Mansun Chan, Lijun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
In this letter, we present a wideband planar antenna with on-demand band-rejected characteristics based on the peelable double electric-LC (DELC) resonator membranes. By applying microfabrication techniques, the subwavelength DELC structure is completely encapsulated in a transparent and flexible thin film with a total thickness of 10 mum. Resonators with four different widths (4.0, 3.6, 3.2, 2.8 mm) are packaged as a solution kit, providing the rejection bands of 4.24-5.11, 4.61-5.38, 4.85-5.48, and 5.20-5.70 GHz, respectively. Owing to the passive and detachable features of this functional sticker, no biasing network is needed for the rejection band's on/off transition and the membrane …
A Wideband 2-D Fast Multipole Algorithm With A Novel Diagonalization Form, Ling Ling Meng, Mert Hidayetoǧlu, Tian Xia, Wei E.I. Sha, Li (Lijun) Jun Jiang, Weng Cho Chew
A Wideband 2-D Fast Multipole Algorithm With A Novel Diagonalization Form, Ling Ling Meng, Mert Hidayetoǧlu, Tian Xia, Wei E.I. Sha, Li (Lijun) Jun Jiang, Weng Cho Chew
Electrical and Computer Engineering Faculty Research & Creative Works
It is well known that Green's function can be expressed by multipole expansion, plane-wave expansion, and exponential expansion (spectral representation). These three expansions constitute of the foundations of the fast multipole algorithm (FMA). The plane-wave expansion has the low-frequency breakdown issue due to its failure in capturing the evanescent spectra, while the multipole expansion is inefficient at high frequencies. The spectral representation usually involves in direction-dependent issue. In this communication, the 2-D FMA is interpreted as Parseval's theorem in Fourier transform. To achieve a stable and accurate transition between the multipole expansion and the plane-wave expansion, a novel diagonalization in …
Applications Of Node-Based Resilience Graph Theoretic Framework To Clustering Autism Spectrum Disorders Phenotypes, John Matta, Junya Zhao, Gunes Ercal, Tayo Obafemi-Ajayi
Applications Of Node-Based Resilience Graph Theoretic Framework To Clustering Autism Spectrum Disorders Phenotypes, John Matta, Junya Zhao, Gunes Ercal, Tayo Obafemi-Ajayi
Electrical and Computer Engineering Faculty Research & Creative Works
With the growing ubiquity of data in network form, clustering in the context of a network, represented as a graph, has become increasingly important. Clustering is a very useful data exploratory machine learning tool that allows us to make better sense of heterogeneous data by grouping data with similar attributes based on some criteria. This paper investigates the application of a novel graph theoretic clustering method, Node-Based Resilience clustering (NBR-Clust), to address the heterogeneity of Autism Spectrum Disorder (ASD) and identify meaningful subgroups. The hypothesis is that analysis of these subgroups would reveal relevant biomarkers that would provide a better …
Dual-Band Filtering Antenna With Novel Transmission Zero Characteristics, Kirti Dhwaj, Li (Lijun) Jun Jiang, Tatsuo Itoh
Dual-Band Filtering Antenna With Novel Transmission Zero Characteristics, Kirti Dhwaj, Li (Lijun) Jun Jiang, Tatsuo Itoh
Electrical and Computer Engineering Faculty Research & Creative Works
A single-layer two-pole dual-band filtering antenna (DBFA) with orthogonal polarizations in the two bands is presented in this letter. The DBFA is based on a common dual-mode T-shaped resonator (TR). The two modes of the common resonator each couple to one of the two orthogonally placed patches, resulting in required radiation. The TR is responsible for generation of three transmission zeroes (TZs) in frequency response corresponding to each polarization at the broadside: two of them being intrinsic TZs due to the TR and the third caused by far field interference of TR's radiation with that of the patch. The low …
Capillary-Tube Package Devices For The Quantitative Performance Evaluation Of Nuclear Magnetic Resonance Spectrometers And Pulse Sequences, Lingyu Chi, Ming Huang, Annalise R. Pfaff, Jie Huang, Rex E. Gerald Ii, Klaus Woelk
Capillary-Tube Package Devices For The Quantitative Performance Evaluation Of Nuclear Magnetic Resonance Spectrometers And Pulse Sequences, Lingyu Chi, Ming Huang, Annalise R. Pfaff, Jie Huang, Rex E. Gerald Ii, Klaus Woelk
Electrical and Computer Engineering Faculty Research & Creative Works
With the increased sensitivity of modern nuclear magnetic resonance (NMR) spectrometers, the minimum amount needed for chemical-shift referencing of NMR spectra has decreased to a point where a few microliters can be sufficient to observe a reference signal. The reduction in the amount of required reference material is the basis for the NMR Capillary-tube Package (CapPack) platform that utilizes capillary tubes with inner diameters smaller than 150 µm as NMR-tube inserts for external reference standards. It is shown how commercially available electrophoresis capillary tubes with outer diameters of 360 µm are filled with reference liquids or solutions and then permanently …
Planar Resonator Embedded Substrate Integrated Waveguide (Siw) Cavity Filter, Kirti Dhwaj, Richard Hadi, Tao Yang, Li (Lijun) Jun Jiang, Joshu Kovitz, Tatsuo Itoh
Planar Resonator Embedded Substrate Integrated Waveguide (Siw) Cavity Filter, Kirti Dhwaj, Richard Hadi, Tao Yang, Li (Lijun) Jun Jiang, Joshu Kovitz, Tatsuo Itoh
Electrical and Computer Engineering Faculty Research & Creative Works
Two capacitor loaded planar resonators are introduced in a two-cavity substrate integrated waveguide (SIW) structure to obtain a fourth order filter. The planar resonators each produce a transmission zero by signal interference. Design methodology for a 5 % bandwidth bandpass filter operating at 2.35 GHz is presented in the paper. Two transmission zeroes are placed on either side of the filter passband to obtain a quasi-elliptic response with a mid-band inserion loss of 1.65 dB. Good agreement is obtained between measured and simulated responses of the single-layer printed circuit board (PCB) filter.
Blazed Metasurface Grating With Handedness Preservation For Circularly Polarized Incident Wave, Xiaoqiang Li, Cheng Tao, Lijun Jiang, Tatsuo Itoh
Blazed Metasurface Grating With Handedness Preservation For Circularly Polarized Incident Wave, Xiaoqiang Li, Cheng Tao, Lijun Jiang, Tatsuo Itoh
Electrical and Computer Engineering Faculty Research & Creative Works
A new blazed metasurface grating for circularly polarized (CP) incident wave operating at 10 GHz is proposed. Such a structure can provide strong auto-collimation for the CP incident wave. Unlike the conventional scatterer, which typically reverses the handedness of the incident CP wave upon reflection, the proposed grating can preserve the handedness. The auto-collimation blazing effect and handedness preservation are achieved by a specially designed reactive impedance surface, which allows independent response controls to transverse electric (TE) and transverse magnetic (TM) polarizations. The proposed idea is demonstrated by simulations and verified by experiments. Comparisons with conventional sawtooth grating are made …
A New Efficient Domain Decomposition Method For Highly Irregular Via Patterns, Ping Li, Lijun Jiang, Xiaoyan Xiong, Hakan Bagci
A New Efficient Domain Decomposition Method For Highly Irregular Via Patterns, Ping Li, Lijun Jiang, Xiaoyan Xiong, Hakan Bagci
Electrical and Computer Engineering Faculty Research & Creative Works
In the high-speed signal path on PCB and packagings, vias usually causes most discontinuities and thereby crosstalks. In simulation and characterizations, they also generate more errors than the trace parts due to rich modes around them. To achieve both efficiency and accuracy, in this paper, a new domain decomposition based finite element time domain (FETD) method is proposed for the analysis of power/ground plate pairs with various types of antipads. Using the magnetic field feature, the 3D computational domain is firstly represented by a quasi-2D field. Then by taking advantage of the fast decaying property of high order modes, the …
Resilient Adaptive Optimal Control Of Distributed Multi-Agent Systems Using Reinforcement Learning, Rohollah Moghadam, Hamidreza Modares
Resilient Adaptive Optimal Control Of Distributed Multi-Agent Systems Using Reinforcement Learning, Rohollah Moghadam, Hamidreza Modares
Electrical and Computer Engineering Faculty Research & Creative Works
This study presents a unified resilient model-free reinforcement learning (RL) based distributed control protocol for leader-follower multi-agent systems. Although RL has been successfully used to learn optimal control protocols for multi-agent systems, the effects of adversarial inputs are ignored. It is shown in this study, however, that their adverse effects can propagate across the network and impact the learning outcome of other intact agents. To alleviate this problem, a unified RL-based distributed control frameworks is developed for both homogeneous and heterogeneous multi-agent systems to prevent corrupted sensory data from propagating across the network. To this end, only the leader communicates …
Model Order Reduction Schemes In Solving Multi-Scale Electromagnetic Problems, Qin S. Liu, Li (Lijun) Jun Jiang, Qi Dai, Hui Gan, Tian Xia, Ting Wan, Sheng Sun, Weng Cho Chew
Model Order Reduction Schemes In Solving Multi-Scale Electromagnetic Problems, Qin S. Liu, Li (Lijun) Jun Jiang, Qi Dai, Hui Gan, Tian Xia, Ting Wan, Sheng Sun, Weng Cho Chew
Electrical and Computer Engineering Faculty Research & Creative Works
Reduced-order models show significant advantages in solving multi-scale electromagnetic problems when the equivalence surfaces are used to enclose the dense-mesh features. With much coarse discretization on the equivalence surface, the computational complexities are largely reduced. Additionally, the scheme is suitable for the scattering problems especially when the location of radiator changes.
Noncontact Time-Domain Emi Measurement Of Two Adjacent Traces On A Pcb, Haimi Qiu, Chengyang Luo, Wenxiao Fang, Lijun Jiang
Noncontact Time-Domain Emi Measurement Of Two Adjacent Traces On A Pcb, Haimi Qiu, Chengyang Luo, Wenxiao Fang, Lijun Jiang
Electrical and Computer Engineering Faculty Research & Creative Works
Nonintrusive electromagnetic interference (EMI) detection is a powerful method for EMI diagnosis in high-speed links and multiple signal PCB designs. However, due to the dispersive nature of signal delivery passages and interferences from neighborhood signals, it is very difficult to locate exactly the EMI source of two adjacent traces without contact. In this paper, a noncontact time-domain voltage measurement method is proposed to detect the EMI signals of two adjacent traces on a PCB. A near-field electric probe is employed and a reconstruction algorithm is developed to recover the voltage signals without contact. Through experimental benchmarks, it is demonstrated that …
The Evolution Of Peec Methods For Si, Pi, And Antennas, Lijun Jiang, Albert E. Ruehli
The Evolution Of Peec Methods For Si, Pi, And Antennas, Lijun Jiang, Albert E. Ruehli
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
Soft Ferrites For Emc Applications, Marina Y. Koledintseva
Soft Ferrites For Emc Applications, Marina Y. Koledintseva
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
Influence Of Higher-Order Modes In Coaxial Waveguide On Measurements Of Material Parameters, Dmitry A. Petrov, Konstantin N. Rozanov, Marina Y. Koledintseva
Influence Of Higher-Order Modes In Coaxial Waveguide On Measurements Of Material Parameters, Dmitry A. Petrov, Konstantin N. Rozanov, Marina Y. Koledintseva
Electrical and Computer Engineering Faculty Research & Creative Works
The use of a coaxial air-filled line as a test fixture for measuring complex permittivity and permeability often shows odd resonance-like behavior of material parameters as functions of frequency. This effect is typically either ascribed to the half-wavelength resonance at the sample length, or erroneously misinterpreted as intrinsic resonance behavior of the material. However, as is shown in this paper, such behavior can be attributed to excitation of the higher-order modes on the surface of the sample resulting in resonance absorption of electromagnetic energy in the test fixture. Herein, analytical, numerical, and experimental results show that there can actually be …
Physical And Technological Aspects Of Microstrip Ebg Filter Design, Marina Koledintseva, Sergiu Radu, Joe Nuebel
Physical And Technological Aspects Of Microstrip Ebg Filter Design, Marina Koledintseva, Sergiu Radu, Joe Nuebel
Electrical and Computer Engineering Faculty Research & Creative Works
Some physical and technological aspects of the electromagnetic bandgap (EBG) common-mode (CM) filters are discussed. A simple EBG notch filter for CM in edge-coupled differential microstrip pair is designed using full-wave numerical electromagnetic software. Mixed-mode S-parameters of the EBG structure are analyzed as functions of its basic geometry, including size and number of EBG patches, gaps between them, geometry and position of signal traces across the EBG patches. In this work, one and two differential pairs crossing the EBG patches are considered. It is shown that the filter performance depends on various technological features, such as frequency-dispersive core and prepreg …
Machine Learning Based Computational Electromagnetic Analysis For Electromagnetic Compatibility, L. (Lijun) J. Jiang, H. M. Yao, H. H. Zhang, Y. W. Qin
Machine Learning Based Computational Electromagnetic Analysis For Electromagnetic Compatibility, L. (Lijun) J. Jiang, H. M. Yao, H. H. Zhang, Y. W. Qin
Electrical and Computer Engineering Faculty Research & Creative Works
While machine learning is becoming a demanding request in every corner of modern technology development, we are trying to see if we could make computational electromagnetic algorithms compatible to machine learning methods. In this paper, we introduce two efforts in line with this direction: solving method of moments (MoM) can be seen as a training training process. Consequently, the artificial neural network (ANN) could be used to solve MoM naturally through training. Amazon Web Service (AWS) can be used as the computations platform to utilize the existing hardware and software resources for machine learning. Another effort regarding to the nonlinear …