Introduction to electrical_engineering_from_roy_2009

Electrical Engineering
Electrical EngineeringElectrical Engineering
Electrical Engineering Overview DEPARTMENT OF
ELECTRICAL
Wireless EEG system with internet/cell
phone /GPS data transfer Capability
Wireless EEG system with internet/cell
phone /GPS data transfer Capability

Why does the world need electrical engineers?
There are many challenges in facing the world for
sustainable and enhanced quality of life:
Transportation
Electrical Engineering Overview
Transportation
Energy
Communication
Medicine
Housing
2

Electrical Engineers are needed for
creating electrical and electronic
solutions to these challenges!
For example…..
3

Transportation
Power Semiconductors
and energy storage
technology – Plug-in
Hybrid Electric Vehicles
(IEEE Spectrum May 2008)
4

Energy: Photovoltaic Materials
Renewable Energy –
Solar Power from
Photovoltaic Materials
Wind Power from
Generators
(IEEE Spectrum, August 2008)
5

Communication
Integrated Circuits and
RF/Microwave Electronics
Apple
iPHONEiPHONE
iPHONEiPHONE
(IEEE Spectrum October 2007)
6

Medical Technologies
Implantable radiation
sensors to improve
cancer therapy
Electromagnetic imaging
(IEE Spectrum June 2008)
7

Housing
Electronic Systems:
energy management
Telecommunications
security
security
entertainment
8

What can you do as an electrical engineering student?
Start designing and building electronic systems!
Start designing and building electronic systems!
For example…
9

Razor-Lazer Music Transmitter
Designed and Built by Students Eric A. DeCuir Jr. and David Fryauf
Electrical Engineering Overview 10
••Project Goal:Project Goal:
•Transmit stereo music over a laser beam to a remote stereo receiver
••How it works:How it works:
•MP3 player outputs varying electrical signal from mini headphone jack this electrical
signal is converted into amplitude modulated 635nm laser light via an audio transformer
silicon phototransistor converts modulated laser light back into varying electrical
signal transducer (speaker) converts electrical energy back into sound by compressing
the air in front of a moving cone creating what our ear interprets as sound.

Razor-Lazer Music Transmitter
Lasers Silicon
Music
out
3V 9V
Audio
transformer
(1000/8)
LED*
Lasers Silicon
photodiodes
Music in
3V 9V
Audio
transformer
(1000/8)
LED*
* LED protects laser
diode from voltage
spikes

Electrical engineers have the opportunity of:Electrical engineers have the opportunity of:
-- Advancing the state of the art in any of theAdvancing the state of the art in any of the
above fieldsabove fields
-- Having a very rewarding professional careerHaving a very rewarding professional career
-- Having a very rewarding professional careerHaving a very rewarding professional career
-- Average entry salary of $56,512Average entry salary of $56,512
-- Entering the job market at the right timeEntering the job market at the right time
12

•• Texas Instruments, National Semiconductor, Micron,Texas Instruments, National Semiconductor, Micron,
IntelIntel
•• National Labs (Sandia, NREL, …)National Labs (Sandia, NREL, …)
•• Government (NSA, Pine Bluff Arsenal)Government (NSA, Pine Bluff Arsenal)
SWEPCO (AEP), SPP, OG&ESWEPCO (AEP), SPP, OG&E
EE Employers
•• SWEPCO (AEP), SPP, OG&ESWEPCO (AEP), SPP, OG&E
•• Northrop Grumman, RaytheonNorthrop Grumman, Raytheon
•• Small BusinessesSmall Businesses
13

19 Faculty Members19 Faculty Members
Fellows of the Institute of Electrical and ElectronicsFellows of the Institute of Electrical and Electronics
EngineeringEngineering
Distinguished Professor Samir El-Ghazaly
Professor Len Schaper
Fellows of Other InstitutesFellows of Other Institutes
Professor Simon Ang
EE Department
Professor Simon Ang
Distinguished Professor Vasu Varadan
Distinguished Professor Vijay Varadan
Dr. Samir ElDr. Samir El--Ghazaly (elGhazaly (el--ghazal@uark.edu)ghazal@uark.edu)
Department Head
3217 Bell Engineering
Dr. Juan Carlos Balda (jbalda@uark.edu)Dr. Juan Carlos Balda (jbalda@uark.edu)
Associate Department Head
3217 Bell Engineering
14

Many opportunities to develop leadership and practical
engineering experience:
• IEEE
• HKN
Student Activities
• HKN
• IMAPS
• IEEE CPMT
• Solar Boat (Annual Solar Splash Competition)
15

The Department has dedicated more than
$55K in scholarship funds for the 2008-2009
FEP class.
Several scholarships will be available for top
EE Scholarships
Several scholarships will be available for top
students, typically $1000 to $2000 per year
• Up to 3 years provided that the student
maintains required academic standards.
16

EE faculty members normally provide opportunities for
undergraduate to engage in research work at their
laboratories.
These opportunities not only enhance your
EE Undergrad Research
These opportunities not only enhance your
undergraduate learning experience but:
(1) you could use this work up to 6 hours of ELEG6 hours of ELEG
technical electivestechnical electives, and
(2) Many cases you are areare paid for conductingpaid for conducting
research!research!
17

Dr. SimonDr. Simon Ang’sAng’s ResearchResearch
ELEG 2113ELEG 2113
Brain Probes and Sensors
E-coli bacteria detection
e-coli
Olfactory bulb recording in rat
Microsystems
Microthruster for
micro spacecraft
Nano-Spring
Nano-Electrical
Contact

Medical ImagingMedical Imaging
Microwave Techniques for Breast CancerMicrowave Techniques for Breast Cancer
Dr. Magda ElDr. Magda El--ShenaweeShenawee
ELEG 3133ELEG 3133 –– ELEG 3703ELEG 3703
TransmittingTransmitting
AntennaAntenna
ReceivingReceiving
AntennaAntenna
BreastBreast
TumorTumor
ELECTRICAL
Radar SystemRadar System
Wave penetrationWave penetration∝ 1/(frequency, tissue conductivity)1/(frequency, tissue conductivity)
High frequency waveHigh frequency wave
Low frequency waveLow frequency wave
Not goodNot good
GoodGood
GoodGood
Not goodNot good

Semiconductor NanostructuresSemiconductor Nanostructures
Dr. Omar ManasrehDr. Omar Manasreh
ELEG 3213ELEG 3213
To deep space applications
ELECTRICAL
From mine detection
using giant rats
To 15 or more color detection
systems using lighter weight and
smaller size satellites
12 11 10 9 8
800 900 1000 1100 1200 1300 1400
0
1x10
3
2x10
3
3x10
3
4x10
3
5x10
3
Wavelength (µm)
VB
=0.6 V
Photoresponse(arbit.units)
Wavenumber (cm
-1
)
T=7.0K VB
=2.0 V
Sample No. SC-QWIP
bottom Stack GaAs/Al0.09
Ga0.91
As
Multi-Color Focal Plane Arrays
Infrared Detectors Based on
Semiconductor Nanostructures
Nanocrystals

MixedMixed--Signal ApplicationsSignal Applications
Dr. Alan MantoothDr. Alan Mantooth
ELEG 3223ELEG 3223
ELECTRICAL

Smart Vest with CNT NanoSmart Vest with CNT Nano--Fibers andFibers and
SensorsSensors
Dr. Vijay VaradanDr. Vijay Varadan
Aligned multiwalled carbon
nanotubes
Vegus nerve stimulator
ELECTRICAL
Wireless smart vest for ECG, EKG, Respiration etc., and
for blood flow , oxygen and viscosity of blood measurement

What’s in your cell phone?What’s in your cell phone?
Dr. Len SchaperDr. Len Schaper
ELEG 3913ELEG 3913
ELECTRICAL
There may be only 1010 –– 15 integrated circuits15 integrated circuits on both sides of a cell
phone printed circuit board, but several hundred passive componentshundred passive components
(resistors and capacitors) highlighted in yellow.
Research work at UAResearch work at UA is finding manufacturing processes to build these
passive components on a layer .002” thick within the circuit board,
freeing up space on the front and back of the board for more ICs andfreeing up space on the front and back of the board for more ICs and
additional functionsadditional functions.
In cell phones, Thin is In!

Embedded Systems at UAEmbedded Systems at UA
Dr. Scott SmithDr. Scott Smith
ELEG 2903, ELEG 2913ELEG 2903, ELEG 2913
Embedded systems are ubiquitous in our daily lives
• e.g. cell phone, MP3 player, PDA, GPS receiver, video game
systems
Bay Area Rapid Transit
(BART) Train Control System
Electric Wheelchair Capable of
Autonomously Traversing Stairs
Fishing System for Tetraplegics
ELECTRICAL

Radio Frequency Identification (RFID)Radio Frequency Identification (RFID)
Dr. Kazem SohrabyDr. Kazem Sohraby
ELEG 3123, ELEG 3133ELEG 3123, ELEG 3133
ELECTRICAL
Main Functions
• Reader-to-Tag
• Tag-to-Reader
• Reader-to-Server
• Server-to-Reader
Basic Operations to Identify Tags
RFID System Architecture

Microwave & Optics Laboratory for Imaging &
Characterization
Dr. Vasundara VaradanDr. Vasundara Varadan
Research Areas Applications
Negative Property MW Materials Collision Avoidance Automotive Radars, Stealth Materials, Cloaks
for ‘Invisibility”, LTCC fabrication of metamaterials
Broadband MW Characterization 5-110 GHz, -40°C-1500°C, MW ceramics, biological tissues,
phantoms
MW Imaging Early detection of Breast Cancer
Non-Destructive Evaluation (NDE) Non-contact security screening for detection of objects concealed
under clothes & footwear - protects privacy of airport passengers!!
Embedded Sensor Systems Self-contained, compact point of care medical monitoring systems
- cough, pulse, blood pressure, respiration
- cough, pulse, blood pressure, respiration
Fully automated computer
controlled
imaging, scanning,
characterization.
MW characterization of critical MW devices,
antenna substrates, space tiles, shielding
& radar absorbing materials, normal and
cancerous breast tissue phantoms, etc.
Excellent opportunities for
undergraduate
research, international summer
research
programs

Power Electronics and Power SystemsPower Electronics and Power Systems
Dr. Juan Carlos Balda,Dr. Juan Carlos Balda,
Dr. Alan Mantooth, Dr. Roy McCannDr. Alan Mantooth, Dr. Roy McCann
ELECTRICAL
www.climatetechnology.gov/library/2005/tech-options/tor2005-135.pdf

QUESTIONS?QUESTIONS?
www.ee.uark.eduwww.ee.uark.edu
EE Contact
www.ee.uark.eduwww.ee.uark.edu
--oror googlegoogle “electrical“electrical
engineering university ofengineering university of
arkansasarkansas””
28

Freshman Year
1 GNEG 1111 Intro to Engineering I 3 GNEG 1121 Intro to Engineering II
3 ENGL 1013 Composition I 4 MATH 2564 Calculus II
3 CHEM 1103 University Chemistry I 4 XXXX XXX4 Freshman Science Elective
4 PHYS 2054 University Physics I 3 XXXX XXX3 University Core Elective
4 MATH 2554 Calculus I 3 ENGL 1023 Technical Composition II
15 semester hours 15 semester hours
Sophomore Year
Sophomore Year
3 ELEG 2903 Digital Design I 3 CSCE 2003 Programming Foundations I
0 ELEG 2900L Digital Design I Lab 1 CSCE 2001L Prog. Found. I Lab
3 ELEG 2103 Electric Circuits I 3 ELEG 2113 Electric Circuits II
1 ELEG 2101L Electric Circuits I Lab 1 ELEG 2111L Electric Circuits II Lab
4 MATH 2574 Calculus III 3 ELEG 2913 Digital Design II
4 XXXX XXX4 Sophomore Science Elective 0 ELEG 2910L Digital Design II Lab
4 MATH 3404 Differential Equations
3 History Government Requirement

Junior Year
3 ELEG 3123 Systems and Signals 3 ELEG 3223 Electronics II
1 ELEG 3121L System & Signal Lab 1 ELEG 3221L Electronics II Lab
3 ELEG 3213 Electronics I 3 ELEG 3303 Energy Conversion
1 ELEG 3211L Electronics I Lab 1 ELEG 3301L Energy Conversion Lab
3 ELEG 3923 Microprocessor Design 3 ELEG 3703 Electromagnetics
0 ELEG 3920L Microprocessor Design Lab 3 Humanities/Social Science Elective
3 CSCE 2013 Programming Foundations II
1 CSCE 2011L Prog. Foundations II Lab
1 CSCE 2011L Prog. Foundations II Lab
3 Math/Science elective
Senior Year
1 ELEG 4061 EE Design I 1 ELEG 4071 EE Design II
3 ELEG 4143 Stochastic Signal Processing 6 Electrical Eng Technical Elective
3 Electrical Engineering Technical Elective 3 Technical Elective
3 Engineering Science Elective 3 Upper-level humanities/Social Science Elective
3 Technical Elective 3 Humanities/Social Science Elective
3 Upper-level Hum/Social Science Elective

Introduction to electrical_engineering_from_roy_2009

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