Overview of Electromagnetics Research Weng Cho Chew Director, Center for Computational...
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Overview of Electromagnetics Research
Weng Cho ChewWeng Cho Chew
Director, Center for Computational ElectromagneticsDirector, Center for Computational Electromagnetics
Department of Electrical and Computer EngineeringDepartment of Electrical and Computer EngineeringUniversity of IllinoisUniversity of Illinois
Urbana, IL 61801Urbana, IL 61801USAUSA
Dean’s VisitDean’s Visit
August 21, 2001August 21, 2001
Faculty in the EM Area
Jennifer BernhardJennifer Bernhard– Wireless antennasWireless antennas
Andreas CangellarisAndreas Cangellaris– EM for circuitsEM for circuits
Weng ChewWeng Chew– CEM (computational EM), fast algorithms, inverse scatteringCEM (computational EM), fast algorithms, inverse scattering
Shun-Lien ChuangShun-Lien Chuang– Optics, lasersOptics, lasers
Jianming JinJianming Jin– CEM, bioelectromagnetics, finite elementsCEM, bioelectromagnetics, finite elements
Eric MichielssenEric Michielssen– CEM, fast time-domain solvers, genetic algorithmsCEM, fast time-domain solvers, genetic algorithms
Jose Schutt-AineJose Schutt-Aine– EM for circuits, computer clusters, computer visulizationEM for circuits, computer clusters, computer visulization
Areas of Research
Computational electromagneticsComputational electromagnetics Fast algorithmsFast algorithms Inverse scattering and imagingInverse scattering and imaging Genetic algorithmsGenetic algorithms Computer chip simulationComputer chip simulation Antennas, reconfigurable antennasAntennas, reconfigurable antennas Wireless communicationWireless communication BioelectromagneticsBioelectromagnetics Subsurface sensing, remote sensingSubsurface sensing, remote sensing Radar cross sectionRadar cross section Electromagnetic compatibility/electromagnetic Electromagnetic compatibility/electromagnetic
interferenceinterference Optoelectronics and lasersOptoelectronics and lasers Computer visualizationComputer visualization
IMPACT OF ELECTROMAGNETICSIMPACT OF ELECTROMAGNETICSIMPACT OF ELECTROMAGNETICSIMPACT OF ELECTROMAGNETICS
ELECTRO-ELECTRO-MAGNETICSMAGNETICS
BiomedicalEngineering& BioTech
WirelessComm. &Propagation
Physics BasedSignalProcessing &Imaging
ComputerChip Design& Circuits
Lasers &Optoelectronics
MEMS &MicrowaveEngineering
RCS Analysis,Design, ATR& StealthTechnology
AntennaAnalysis &Design
EMC/EMIAnalysis
RemoteSensing &SubsurfaceSensing & NDE
VFY218 at 3 GHz (W. Chew)
Bistatic RCS of VFY218 at 3 GHz8 processors of SGI Origin 2000# of Unknowns N = 2 millions
FISCLUDCG
Memory Matrix-fill LUD One-RHS (GB) (days) (years) (hrs)
5 0.1 932,000 600.0 200 432,000 600.0 500
AZ
83 Camaro at 1 GHz by FISC (W. Chew)
Irradiation of a 83 Camaro at 1 GHz by a Hertzian Irradiation of a 83 Camaro at 1 GHz by a Hertzian dipole.dipole.
3D Layered Medium Problems 3D Layered Medium Problems
- Numerical Results (W. Chew)- Numerical Results (W. Chew) Underground BunkerUnderground Bunker
f = 300MHzf = 300MHzN = 100,314N = 100,3146 level ML-6 level ML-FIPWAFIPWA
, 60 , 90inc inc o o
2m
5m5m
2m
zxy
2 3.5r
Luneburg Lens – Scattering (J. Jin)
Inlet Scattering (J. Jin)
Simulation Measurement
> 2,000,000 unknowns
Corrugated Horn Antenna (J. Jin)
Corporate-Fed Antenna Array (J. Jin)
Current distribution
Radiation patterns
EM Interaction (J. Jin)
Magnetic field
SAR at 171 MHz
EM VFY218: Current distribution (snapshots in time) (E. Michielssen)
.
25 cm
25 cm
5 cm
17.5 cm
10 cm
1 cm
20 cm
4.5 cm6 cm
xy
z
Broadband Analysis of Wave Interactions with Nonlinear Electronic Circuitry
k̂
excE
0.5 cm
15 cm
1 cm
y
500 500 500 500
Voltages on the varistors
0 2 4 6 8x 10
-3
-1.5
-1
-0.5
0
0.5
1
1.5line1line2line3
Vo l
t ag e
(kV
)
( )t s
PWTD solvers permit analysis of wave broadband EMC/EMI phenomena, and the assessment of electronic upset and terrorism scenarios
PWTD solvers are used to fully characterize a 25-88 MHz log-periodic monopole array mounted on a C-12 aircraft. The array serves in foilage penetration radar studies.
Broadband Analysis of Antennas, Scattering, and Radiation Phenomena
Prof. Jennifer T. Bernhard, Electromagnetics Laboratory, UIUC ([email protected])
Reconfigurable Antennas for Wireless Communication(Jennifer Bernhard)
Planar and microstrip Planar and microstrip antenna development antenna development
– Reconfigurable in frequency, Reconfigurable in frequency, bandwidth, and/or radiation bandwidth, and/or radiation patternpattern
– Linear and circular polarizationLinear and circular polarization
– Patch, spiral, sinuousPatch, spiral, sinuous
For applications in:For applications in:– Planar phased arrays and Planar phased arrays and
reflectarraysreflectarrays
– Single element wireless Single element wireless communication implementationscommunication implementations
Courtesy NASA GRC
Advanced Electromagnetic Modeling of Mixed-Signal Systems (A.
Cangellaris) ObjectiveObjective Establish a comprehensive modeling capability with Establish a comprehensive modeling capability with
electromagnetic accuracy and simulation efficiency electromagnetic accuracy and simulation efficiency necessary for virtual prototyping of multi-functional, necessary for virtual prototyping of multi-functional, mixed-signal, multi-GHz (digital/RF/microwave/opto -mixed-signal, multi-GHz (digital/RF/microwave/opto -electronic) integrated systemselectronic) integrated systems
ImpactImpact Global modeling and simulation environment that comprehends the temporal and Global modeling and simulation environment that comprehends the temporal and
spatial multi-scale features of mixed-signal, multi-GHz, integrated electronic spatial multi-scale features of mixed-signal, multi-GHz, integrated electronic subsystems and systemssubsystems and systems
Comprehensive electromagnetic modeling at the chip, package, board and system Comprehensive electromagnetic modeling at the chip, package, board and system levellevel
Enable a universal computer-aided design environment for multi-physics (electrical, Enable a universal computer-aided design environment for multi-physics (electrical, optical, thermal, mechanical) modeling & simulation aimed at the virtual prototyping optical, thermal, mechanical) modeling & simulation aimed at the virtual prototyping of tomorrow’s integrated systemsof tomorrow’s integrated systemsA.C. Cangellaris’ Research Group: “Modeling from dc to light!”“Modeling from dc to light!”
Specific Research TasksSpecific Research Tasks a)a) Electromagnetic (EM) modeling of on- and off-chip electronic and optical interconnectsElectromagnetic (EM) modeling of on- and off-chip electronic and optical interconnects
b)b) EM modeling of passive digital/RF/microwave signal processing components (filters, couplers, EM modeling of passive digital/RF/microwave signal processing components (filters, couplers, power dividers, etc.) integrated in a 3-D substratepower dividers, etc.) integrated in a 3-D substrate
c)c) Comprehensive modeling of power distribution networks for mixed-signal systemsComprehensive modeling of power distribution networks for mixed-signal systems
d)d) Behavioral modelingBehavioral modeling of non-linear digital, analog/RF, and optical devices of non-linear digital, analog/RF, and optical devices
e)e) Methodologies for Methodologies for EM complexity abstractionEM complexity abstraction and and model order reductionmodel order reduction that lead to compact that lead to compact and accurate and accurate macro-modelsmacro-models for complex EM and opto-electronic devices and functional blocks for complex EM and opto-electronic devices and functional blocks
f)f) Methodologies for the incorporation of EM macro-models in a Methodologies for the incorporation of EM macro-models in a universal, state space- based, universal, state space- based, non-linear simulation environmentnon-linear simulation environment
SponsorsSponsors DARPA (Automated Design Tools for Integrated Mixed-Signal Microsystems-NEOCAD)DARPA (Automated Design Tools for Integrated Mixed-Signal Microsystems-NEOCAD) Intel, Motorola, IBM, Texas Instruments, Semiconductor Research CorporationIntel, Motorola, IBM, Texas Instruments, Semiconductor Research Corporation NSFNSF Army Research Office (MURI Program on Quasi-Optical Power Combining Systems)Army Research Office (MURI Program on Quasi-Optical Power Combining Systems)
Advanced Electromagnetic Modeling of Mixed-Signal Systems (A.
Cangellaris)
A.C. Cangellaris’ Research Group: “Modeling from dc to light!”“Modeling from dc to light!”
Optical Communication (S.
Chuang) The exploding demand for Internet access, The exploding demand for Internet access,
telecommunications, and broadband services has led to a telecommunications, and broadband services has led to a push for greater lightwave transmission capacity.push for greater lightwave transmission capacity. – Optical fiber networks now carry a large amount of voice and Optical fiber networks now carry a large amount of voice and
data traffic all over the world.data traffic all over the world. Improving the high-speed performance of semiconductor Improving the high-speed performance of semiconductor
lasers benefits the telecommunication industry and society.lasers benefits the telecommunication industry and society.
Transmitter Receiver
Laser
Electrical data source
Photodetector
Electrical data recovered
Fiber cable(Installed on land,
under the ocean, and in the walls of buildings)
Modulated optical signal
Location 2Location 1
Four-channel Wavelength Division Multiplexing (WDM) integrated laser source
(S. Chuang) This device consists of four This device consists of four
wavelength-tunable three-electrode wavelength-tunable three-electrode DFB lasers which are coupled into a DFB lasers which are coupled into a single waveguide, optical amplifier, single waveguide, optical amplifier, and modulator. and modulator.
Professor S. L. Chuang’s group Professor S. L. Chuang’s group conducts research on high-speed conducts research on high-speed semiconductor optoelectronic semiconductor optoelectronic devices, fiber optics, and optical devices, fiber optics, and optical transmission characteristics. Both transmission characteristics. Both theory and experiment are theory and experiment are researched.researched.
Distributed-feedbacklasers
Electroabsorptionmodulator
s-bends
Star coupler
Optical amplifier