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Electrical and Computer Engineering Faculty Research & Creative Works

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Articles 1711 - 1740 of 3518

Full-Text Articles in Engineering

Dynamic Response Improvement In A Buck Type Converter Using Capacitor Current Feed-Forward Control, Lisheng Shi, Mehdi Ferdowsi, Mariesa Crow Nov 2010

Dynamic Response Improvement In A Buck Type Converter Using Capacitor Current Feed-Forward Control, Lisheng Shi, Mehdi Ferdowsi, Mariesa Crow

Electrical and Computer Engineering Faculty Research & Creative Works

The dynamic performance of dc-dc power electronic converters is mainly determined by the output filtering capacitor and inductor, control loop(s) compensator(s), and the voltage conversion ratio. Normally, a larger capacitance and/or a smaller inductance are not recommended because of the extra cost and size of the capacitor and/or the increment of the inductor current ripple. The capacitor current feed-forward method has gained popularity due its fast dynamic response, simpler structure, and less sensing losses. In applications where a large voltage conversion ratio is needed, dynamic response for a load step-down scenario is worse than that of a load step-up condition. …

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Effects Of Variable Solar Irradiance On The Reactive Power Compensation For Large Solar Farm, Dustin F. Howard, Ronald G. Harley, Jiaqi Liang, Ganesh K. Venayagamoorthy Oct 2010

Effects Of Variable Solar Irradiance On The Reactive Power Compensation For Large Solar Farm, Dustin F. Howard, Ronald G. Harley, Jiaqi Liang, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

Dish-Stirling systems are a form of concentrating solar power (CSP) emerging as an efficient and reliable source of renewable energy. Various technical hurdles are involved in the grid interconnection of dish-Stirling systems, particularly with issues related to power factor correction, low voltage ride-through capability, and reactive power planning. While there are no grid-interconnection requirements specific to dish-Stirling technology, the requirements currently established for wind farms are used as a starting point due to the similar design and operating characteristics between wind farms and dish-Stirling solar farms. a dish-Stirling solar farm requires external reactive power compensation to meet the power factor …

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Estimation Of Voltage Stability Index In A Power System With Plug-In Electric Vehicles, K. Joseph Makasa, Ganesh K. Venayagamoorthy Oct 2010

Estimation Of Voltage Stability Index In A Power System With Plug-In Electric Vehicles, K. Joseph Makasa, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

A Multilayer Perceptron (MLP) neural network-based approach for estimation of the voltage stability L-index in a power system with Plug-in Electric Vehicles (PEVs) is presented. This technique overcomes the limitations of direct calculation of L-index from measurements at a load bus. the L-index calculation is dependent upon the no-load voltage phasor for any given system topology and operating condition. in practice it is difficult to obtain no-load voltage phasor at a bus each time the system topology or operating point changes. an MLP neural network-based method capable of estimating voltage stability L-index at a load bus using direct measurements and …

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Optofluidic Biosensors Based On Color Imaging, Jongwon Park, Chang-Soo Kim Oct 2010

Optofluidic Biosensors Based On Color Imaging, Jongwon Park, Chang-Soo Kim

Electrical and Computer Engineering Faculty Research & Creative Works

A color CCD (charge-coupled device) camera is used as a chemical detector to quantify fluorescence emission intensities from two kinds of optofluidic device platforms. the fluorophores responsive to oxygen are immobilized in photo-patternable hydrogel matrices. the first device is a hydrogel sensor array formed within a commercial silicone elastomer imaging chamber. the second one involves a double-chamber fluidic device composed of a permeable membrane layer and dry film photoresist layers. the results suggest that digital color imagers, in combination with a simple color separation method, can serve as the high-quality chemical detectors for fluidic biosensors and biological culture platforms. © …

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Color Intensity Method For Hydrogel Oxygen Sensor Array, Jongwon Park, Wonhak Hong, Chang-Soo Kim Oct 2010

Color Intensity Method For Hydrogel Oxygen Sensor Array, Jongwon Park, Wonhak Hong, Chang-Soo Kim

Electrical and Computer Engineering Faculty Research & Creative Works

The oxygen imaging technique to obtain a 2-D distribution is a convenient method because it does not require individual addressing of each sensing element in a sensor array. Until recently, color charge coupled devices (CCDs) have rarely been used for oxygen imaging in spite of usefulness for analyzing the spectral content of images. in this work, a color CCD camera was used for luminescence intensity imaging. Two methods of color intensity analysis are investigated and compared. the first method is to analyze the total Red-Green-Blue (RGB) color intensity of the original color image. the second method involves extracting the red …

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Intelligent Coordinated Control Of A Wind Farm And Distributed Smartparks, Pinaki Mitra, Ganesh K. Venayagamoorthy Oct 2010

Intelligent Coordinated Control Of A Wind Farm And Distributed Smartparks, Pinaki Mitra, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

Energy storage is generally recommended in presence of an intermittent source like wind farm for a better control over the power generation from the wind turbine with the variation of the wind speed. In this paper, the potential of plug-in electric vehicle parking lot (SmartPark) as an energy storage in a power system with a large wind farm has been investigated. Also, a fuzzy logic based coordination controller of the wind farm and the distributed SmartParks has been proposed in this paper. The fuzzy controller uses the total state-of-charge of the SmartParks and the difference between instantaneous demand and the …

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Optimized Waveform Relaxation Solution Of Electromagnetic And Circuit Problems, Martin J. Gander, Albert E. Ruehli Oct 2010

Optimized Waveform Relaxation Solution Of Electromagnetic And Circuit Problems, Martin J. Gander, Albert E. Ruehli

Electrical and Computer Engineering Faculty Research & Creative Works

New algorithms are needed to solve electromagnetic problems using today's widely available parallel processors. In this paper, we show that applying the optimized waveform relaxation approach to a partial element equivalent circuit will yield a powerful technique for solving electromagnetic problems with the potential for a large number of parallel processor nodes.

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Opportunistic Cooperation For Multi-Antenna Multi-Relay Networks, Weiliang Zeng, Chengshan Xiao, Youzheng Wang, Jianhua Lu Oct 2010

Opportunistic Cooperation For Multi-Antenna Multi-Relay Networks, Weiliang Zeng, Chengshan Xiao, Youzheng Wang, Jianhua Lu

Electrical and Computer Engineering Faculty Research & Creative Works

A low-complexity, near-optimal transmit antenna selection algorithm is proposed for multi-relay networks where all nodes are equipped with multiple antennas. We first establish a system model and a unified capacity maximization framework for a two-hop opportunistic relaying scheme where the source node (S) transmits signals to multiple relay nodes (R) in the first time slot, and the selected relay antennas and their corresponding relay nodes receive, decode and forward the messages to the destination (D) in the second time slot. based on the system model, we develop a transmit antenna selection algorithm that maximizes the network capacity assuming that the …

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Nonlinear Control Of Facts Controllers For Damping Interarea Oscillations In Power Systems, Mahyar Zarghami, Jagannathan Sarangapani, Mariesa Crow Oct 2010

Nonlinear Control Of Facts Controllers For Damping Interarea Oscillations In Power Systems, Mahyar Zarghami, Jagannathan Sarangapani, Mariesa Crow

Electrical and Computer Engineering Faculty Research & Creative Works

This paper introduces a new nonlinear control of flexible ac transmission systems (FACTS) controllers for the purpose of damping interarea oscillations in power systems. FACTS controllers consist of series, shunt, or a combination of series-shunt devices which are interfaced with the bulk power system through injection buses. Controlling the angle of these buses can effectively damp low frequency interarea oscillations in the system. The proposed control method is based on finding an equivalent reduced affine nonlinear system for the network from which the dominant machines are extracted based on dynamic coherency. It is shown that if properly selected, measurements obtained …

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Pso Tuned Flatness Based Control Of A Magnetic Levitation System, Ganesh K. Venayagamoorthy, E. C. Anene Oct 2010

Pso Tuned Flatness Based Control Of A Magnetic Levitation System, Ganesh K. Venayagamoorthy, E. C. Anene

Electrical and Computer Engineering Faculty Research & Creative Works

Investigation on the application of flatness-based feedback linearization to the magnetic levitation model of INTECOTm Maglev system is presented in this paper. The MAGLEV system dynamics studied consists of a set of third order nonlinear differential equations. Using computational techniques proposed by Levine, it is verified that the ball position is the flat output. The derived flat output is applied in the construction of a nonlinear control law used to control the levitation to a set point as well as tracking a sine function trajectory. The controller gains are obtained and optimized using particle swarm optimization. The simulation results compared …

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Robust Mimo Underwater Acoustic Communications Using Turbo Block Decision-Feedback Equalization, Jun Tao, Yahong Rosa Zheng, Chengshan Xiao, T. C. Yang Oct 2010

Robust Mimo Underwater Acoustic Communications Using Turbo Block Decision-Feedback Equalization, Jun Tao, Yahong Rosa Zheng, Chengshan Xiao, T. C. Yang

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, a robust detection scheme is proposed for high data rate single-carrier multiple-input multiple-output (MIMO) underwater acoustic communications. the new scheme adopts turbo block decision-feedback equalization, where the soft-decision equalizer performs successive soft interference cancellation of both the InterSymbol interference in the time domain, and the multiplexing interference in the space domain. Attributed to the inherent advantage of the block decision-feedback equalizer (BDFE) over other conventional equalizers, the MIMO turbo detection algorithm provides high performance with fast convergence speed. with the interblock interference properly removed, the MIMO BDFE is performed with overlapped information blocks without guard intervals, thus …

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Real-Time Study Of A Current Controlled Plug-In Vehicle For Vehicle-To-Grid Transaction, P. Mitra, Ganesh K. Venayagamoorthy, Keith Corzine Sep 2010

Real-Time Study Of A Current Controlled Plug-In Vehicle For Vehicle-To-Grid Transaction, P. Mitra, Ganesh K. Venayagamoorthy, Keith Corzine

Electrical and Computer Engineering Faculty Research & Creative Works

A real-time model of a current controlled plugin electric vehicle (PEV) parking lot (SmartPark) has been presented in this paper. the controller of the SmartPark is designed in such a way that the active and reactive power transaction with the grid can be controlled independently. Also, the controller limits the current going out of the vehicle during grid faults for batter protection. the real-time modeling is carried out on a Real-Time Digital Simulator (RTDS). Initially, the performance of the controller is studied while being connected to an infinite bus. Also, twelve such parking lot models are integrated to a 12-bus …

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Efficient Utilization Of Renewable Energy Sources By Gridable Vehicles In Cyber-Physical Energy Systems, Ahmed Yousuf Saber, Ganesh K. Venayagamoorthy Sep 2010

Efficient Utilization Of Renewable Energy Sources By Gridable Vehicles In Cyber-Physical Energy Systems, Ahmed Yousuf Saber, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

The main sources of emission today are from the electric power and transportation sectors. One of the main goals of a cyber-physical energy system (CPES) is the integration of renewable energy sources and grid able vehicles (GVs) to maximize emission reduction. GVs can be used as loads, sources and energy storages in CPES. a large CPES is very complex considering all conventional and green distributed energy resources, dynamic data from sensors, and smart operations (e.g., charging/discharging, control, etc.) from/to the grid to reduce both cost and emission. If large number of GVs are connected to the electric grid randomly, peak …

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Physics-Based Inductance Extraction For Via Arrays In Parallel Planes For Power Distribution Network Design, Jingook Kim, Liehui Ren, Jun Fan Sep 2010

Physics-Based Inductance Extraction For Via Arrays In Parallel Planes For Power Distribution Network Design, Jingook Kim, Liehui Ren, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

A systematic approach for inductance extraction for via arrays between two parallel planes is presented. Both self and mutual inductance values are obtained based on a cavity model. the physics associated with the via inductances is analyzed, and a rigorous method is developed to derive an equivalent total inductance for multiple via arrays. Analytical equations for the equivalent total inductance are derived in closed forms for simple cases. the proposed method is corroborated with measurements, and application of the method for power distribution network designs is demonstrated. © 2010 IEEE.

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Design Of A Conditioner For Smoothing Wind Turbine Output Power, Murali Bottu, Mariesa Crow, A. Curt Elmore Sep 2010

Design Of A Conditioner For Smoothing Wind Turbine Output Power, Murali Bottu, Mariesa Crow, A. Curt Elmore

Electrical and Computer Engineering Faculty Research & Creative Works

As a result of wind speed intermittency, highly variable wind power output can adversely impact local loads. We propose a conditioner to smooth the variable wind power by utilizing the energy of an ultracapacitor. The conditioner is based on a single phase voltage source inverter (VSI) connected between the grid interconnection point and the ultracapacitor. The shunt VSI injects or absorbs active power from the line to smooth the wind power by utilizing the short term storage capabilities of the ultracapacitor. The ultracapacitor is connected to the DC link through a DC-DC converter, which maintains the voltage of the DC …

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Hamiltonian Theory Based Coordinated Nonlinear Control Of Generator Excitation And Statcoms, Keyou Wang, Mariesa Crow Sep 2010

Hamiltonian Theory Based Coordinated Nonlinear Control Of Generator Excitation And Statcoms, Keyou Wang, Mariesa Crow

Electrical and Computer Engineering Faculty Research & Creative Works

A coordinated controller for generator excitation and STATCOMs is studied based on the Hamiltonian function method. The Hamiltonian realization structure for multimachine power systems including STATCOMs is developed leading to a proposed coordinated scheme of excitation control and STATCOM control. Simulation results illustrate the effectiveness of the proposed control strategy.

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Adaptive Quadrant Filter Based Phase Locked Loop System, L. Shi, Mariesa Crow Sep 2010

Adaptive Quadrant Filter Based Phase Locked Loop System, L. Shi, Mariesa Crow

Electrical and Computer Engineering Faculty Research & Creative Works

Phase-Locked-Loop (PLL) is one of the key technologies extensively used in grid connected power electronics system. A good PLL system can detect the grid phase angle and frequency fast and accurately, and additionally it can extract the positive sequence (or fundamental component for single phase system) exactly. In real applications, source signal (voltage or current) sensed for PLL usually includes harmonic distortion, unbalanced components, noises and frequency variations. Conventional PLL strategy cannot solve all the problems, especially the unbalanced and harmonic distortion. There is a trade-off between the dynamic response and phase angle tracking accuracy. Different PLL solutions are proposed …

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The Use Of Spike-Based Representations For Hardware Audition Systems, Shih Chii Liu, Nima Mesgarani, John Harris, Hynek Hermansky Aug 2010

The Use Of Spike-Based Representations For Hardware Audition Systems, Shih Chii Liu, Nima Mesgarani, John Harris, Hynek Hermansky

Electrical and Computer Engineering Faculty Research & Creative Works

Humans are able to process speech and other sounds effectively in adverse environments, hearing through noise, reverberation, and interference from other speakers. To date, machines have been unable to match human performance. One profound difference between biological and engineering systems comes at the input stage. In machines, an acoustic signal is typically chopped into short equally spaced segments in time. In biological systems, the cochlea outputs asynchronous spikes that respond in real-time to acoustic inputs. In this paper we describe a spiking cochlea implementation and recent experiments in both speaker and speech recognition that use spikes as input. ©2010 IEEE.

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Mean Firing Rate Spike Representations For Speech Recognition, John G. Harris, Yukun Feng Aug 2010

Mean Firing Rate Spike Representations For Speech Recognition, John G. Harris, Yukun Feng

Electrical and Computer Engineering Faculty Research & Creative Works

The nature of spike coding of auditory signals is studied by comparing mean firing rate codes with conventional approaches in speech recognition tasks. Mean firing rate spike representations are problematic since most auditory nerve fibers are saturated at typical conversation levels. However, these problems are eased somewhat when it is considered that there are other nerve fibers (e.g. low spontaneous firing rate fibers) that could efficiently encode the information at each channel of the cochlea. We show that window-based, mean firing rate features can be used with a crude cochlea model to achieve the same level of performance as a …

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An Adaptive Neuron Circuit For Signal Compression, Sheng Feng Yen, John G. Harris Aug 2010

An Adaptive Neuron Circuit For Signal Compression, Sheng Feng Yen, John G. Harris

Electrical and Computer Engineering Faculty Research & Creative Works

We present a low-bandwidth analog circuit for implementing an adaptive biphasic leaky integrate-and-fire neuron. This neuron circuit is targeted for signal compression in neural recording applications. Unlike other adaptive neuron circuits, this adaptive integrate-and-fire neuron supports signal reconstruction with known threshold voltages. Matlab simulations show promising bandwidth reduction comparing to an integrate-and-fire neuron without the adaptive feature. We quantify the circuit performance in terms of the tradeoff between signal reconstruction accuracy and bandwidth. ©2010 IEEE.

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Opportunistic Relaying For Multi-Antenna Cooperative Decode-And-Forward Relay Networks, Weiliang Zeng, Chengshan Xiao, Youzheng Wang, Jianhua Lu Aug 2010

Opportunistic Relaying For Multi-Antenna Cooperative Decode-And-Forward Relay Networks, Weiliang Zeng, Chengshan Xiao, Youzheng Wang, Jianhua Lu

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, we investigate the relaying scheme for multi-antenna cooperative networks without channel state information at the transmitters. It is shown that the classic opportunistic relaying scheme, which allows only one relay node to forward the message, may lead to significant loss when it is extended to the corresponding multi-antenna relay scenarios. a generalized opportunistic relaying approach, which selects more transmit antennas distributed on multiple relay nodes to transmit data simultaneously, is proposed to maximize the network throughput via balancing the source-relay and the relay-destination channels. Numerical examples show the large impact of multiple antennas and relays on the …

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Low-Complexity Turbo Block Decision Feedback Equalization For Mimo Systems, Jun Tao, Jingxian Wu, Yahong Rosa Zheng Aug 2010

Low-Complexity Turbo Block Decision Feedback Equalization For Mimo Systems, Jun Tao, Jingxian Wu, Yahong Rosa Zheng

Electrical and Computer Engineering Faculty Research & Creative Works

This paper proposes a low-complexity turbo block decision feedback equalizer (BDFE) with reliability-Based successive soft interference cancellation (SSIC) for multiple-input multiple-output (MIMO) systems. Turbo equalization in MIMO systems needs to combat both InterSymbol interference (ISI) due to frequency-selective fading and multiplexing interference (MI) among data streams transmitted by different antennas. the proposed MIMO BDFE performs SSIC on both ISI in the time domain and MI in the space domain. for an SSIC receiver, the order in which the symbols are detected and canceled is critical to the system performance, yet it is often overlooked in the literature. We propose a …

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Layered Frequency-Domain Turbo Equalization For Single Carrier Broadband Mimo Systems, Jian Zhang, Yahong Rosa Zheng, Jingxian Wu Aug 2010

Layered Frequency-Domain Turbo Equalization For Single Carrier Broadband Mimo Systems, Jian Zhang, Yahong Rosa Zheng, Jingxian Wu

Electrical and Computer Engineering Faculty Research & Creative Works

A new layered frequency-domain turbo equalization (LFDTE) scheme is proposed for single carrier (SC) multiple input multiple-output (MIMO) systems. the proposed scheme combines the respective advantages of layered detection and turbo equalization to further lower the bit error rate (BER) for high-data-rate communications. Different from the traditional frequency-domain turbo equalization (FDTE) method for MIMO systems, our new detection algorithm employs a layered structure in each turbo iteration, and at each layer a group of best data streams is detected in the form of soft symbols and then canceled from the received signals in frequency domain. the extrinsic information for the …

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Solving Multi-Scale Low Frequency Electromagnetic Problems, Zhi Guo Qian, Mao Kun Li, Zu Hui Ma, Li (Lijun) Jun Jiang, Weng Cho Chew Aug 2010

Solving Multi-Scale Low Frequency Electromagnetic Problems, Zhi Guo Qian, Mao Kun Li, Zu Hui Ma, Li (Lijun) Jun Jiang, Weng Cho Chew

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, we will discuss two methods to tackle the low-frequency, multi-scale electromagnetics problem. First we will discuss the augmented electric field integral equation (AEFIE), and then, we will discuss the equivalence principle algorithm (EPA). The AEFIE allows the solution of such problems without the need to perform a loop search of a complex structure. The EPA allows the separation of circuit physics from wave physics in a multiscale problem. Hybridization of these two methods will be discussed.

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Channel Equalization For Single Carrier Mimo Underwater Acoustic Communications, Chengshan Xiao, Jun Tao, Yahong Rosa Zheng, T. C. Yang, Wen Bin Yang Aug 2010

Channel Equalization For Single Carrier Mimo Underwater Acoustic Communications, Chengshan Xiao, Jun Tao, Yahong Rosa Zheng, T. C. Yang, Wen Bin Yang

Electrical and Computer Engineering Faculty Research & Creative Works

Multiple-input multiple-output (MIMO) underwater acoustic (UWA) channels introduce both space-time interference (STI) and time-varying phase distortion for transmitted signals. in such cases, the equalized symbols produced by conventional equalizer aiming for STI cancelation suffer phase rotation and thus cannot be reliably detected. in this paper, we propose a new equalization scheme for high data rate single carrier MIMO UWA channels. Different from existing methods employing joint equalization and symbol wise phase tracking technology, the proposed scheme decouples the interference cancelation (IC) operation and the phase compensation operation, leading to a generalized equalizer structure combining an IC equalizer with a phase …

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A New Receiver Placement Scheme Using Delaunay Refinement-Based Triangulation, Mohammed Rana Basheer, Sarangapani Jagannathan Aug 2010

A New Receiver Placement Scheme Using Delaunay Refinement-Based Triangulation, Mohammed Rana Basheer, Sarangapani Jagannathan

Electrical and Computer Engineering Faculty Research & Creative Works

In this paper, a sub-optimal solution to the receiver placement and number of receiver determination problem is introduced. to achieve this overall goal, first, localization error for a received signal strength indicator (RSSI)-Based N-receiver system localizing a transmitter is estimated. Subsequently, this estimator error along with the 2D-tessellation techniques such as Delaunay refinement are used to position candidate receivers not only to minimize their number needed to meet the location error threshold but also to reduce the dilution of localization accuracy due to the layout of receivers. Rigorous mathematical analysis indicates that the receiver count generated by our Delaunay Refinement-Based …

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A New Adaptive Compression Scheme For Data Aggregation In Wireless Sensor Networks, Priya Kasirajan, Carl Larsen, S. Jagannathan Aug 2010

A New Adaptive Compression Scheme For Data Aggregation In Wireless Sensor Networks, Priya Kasirajan, Carl Larsen, S. Jagannathan

Electrical and Computer Engineering Faculty Research & Creative Works

Wireless sensor nodes typically have limited processing capabilities and are powered by batteries. the amount of energy expended in transmitting a single data bit would be several orders of magnitude higher when compared to the energy needed for a 32-bit computation. Thus, to maximize network lifetime, data transmissions should be minimized without losing vital information. in this paper, a novel adaptive compression scheme using nonlinear estimation theory is proposed for data aggregation. Satisfactory performance of the proposed compression scheme in the presence of noise, distortion, and quantization errors is demonstrated using Lyapunov approach. the proposed scheme is contrasted with existing …

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Electrical Modelling Of Temperature Distributions In On-Chip Interconnects, Packaging, And 3d Integration, Lijun Jiang, Chuan Xu, Howard Smith, Barry Rubin, Alina Deutsch, Alain Caron Aug 2010

Electrical Modelling Of Temperature Distributions In On-Chip Interconnects, Packaging, And 3d Integration, Lijun Jiang, Chuan Xu, Howard Smith, Barry Rubin, Alina Deutsch, Alain Caron

Electrical and Computer Engineering Faculty Research & Creative Works

In this talk, we will introduce a novel methodology using existing electromagnetic modelling tools for interconnect and packaging structures to simulate and model the temperature distribution without major modifications to these tools or simulated structures. This methodology can easily be integrated with the chip technology information and frame an electrical circuit simulator into an automatic, template-based simulation and optimization flow. A new accurate closed-form thermal model is further developed to simplify unnecessary object details. The model allows an equivalent medium with effective thermal conductivity (isotropic or anisotropic) to replace details in non-critical regions accurately so that complex interconnect structures can …

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Analysis Of Mutual Inductance Effect Between Decoupling Capacitors On Planar Power Bus, Jingook Kim, Bruce Archambeault, James L. Knighten, Jun Fan Aug 2010

Analysis Of Mutual Inductance Effect Between Decoupling Capacitors On Planar Power Bus, Jingook Kim, Bruce Archambeault, James L. Knighten, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

The physics associated with mutual inductance between vias has been analyzed, and a method has been proposed to calculate the total equivalent inductance including the effect of mutual inductance. the method has been further simplified to an expression in a closed form. the equations have also been verified and shown to be accurate by measurements. © 2010 IEEE.

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Improving Electromagnetic Compatibility Performance Of Packages And Sip Modules Using A Conformal Shielding Solution, Nozad Karim, Jingkun Mao, Jun Fan Aug 2010

Improving Electromagnetic Compatibility Performance Of Packages And Sip Modules Using A Conformal Shielding Solution, Nozad Karim, Jingkun Mao, Jun Fan

Electrical and Computer Engineering Faculty Research & Creative Works

High-speed digital and wireless devices radiate unintentional electromagnetic noise, which can affect the normal operation of other devices within the same system, causing intra-system electromagnetic interference (EMI) problems, or contribute to the total radiated EMI from the system, resulting in potential system-level EMI issues. PCB and system level shielding may alleviate the system-level EMI between wireless PCB board and the outside environment, but seldom prevent the intra-system EMI within the shielding enclosure. Package and System in Package (SiP) level shielding is desirable to shield the unintended radiation and protect the other circuits on board. Traditionally an external metal lid is …

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