Microwave
& RF Research Group
Research activities are carried out in the Center
for Microwaves and Radio Frequency, which comprises
the Radar & Signal Processing Laboratory, Antenna & Scattering
Laboratory, MMIC Laboratory
and the Microwave Laboratory.
The current focuses in the Microwave & RF group are on electromagnetic modeling and design of passive and active devices and systems, where the aim is to develop expertise in the fabrication of components, circuits and systems for applications such as wireless communications systems
and phased arrays for radar. Major facilities on-campus include a Virtual Center for Device Modeling and MMIC Design, a national
EMI/EMC Research Center and an externally-funded $5.5 million high-specifications microwave anechoic chamber to serve as national
resource centers. |
Antenna & radar
cross - section
measurement facility,
Center for Microwaves
and Radio Frequency
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Communications &
Information Engineering Group
With a general
interest on computers and their applications, the group has four research groups and
four well-equipped laboratories: Biomedical Engineering Laboratory, Computer
Communication Networks Laboratory, Digital Systems and Applications Laboratory,
and Vision and Image Processing Laboratory.
| In biomedical engineering, the
current focuses are medical expert systems, biomedical signal processing and
interpretation, portable ECG instrumentation, and healthcare information systems. In
computer communication networks, the focuses include broadband and high-speed network
applications, congestion control, internetworking, multimedia networking, quality service
management, and mobile and wireless networking. In digital systems and applications,
current interests include implementation platforms (for e.g. architectural design of DSPs,
multi-processor systems and applications of single chip micro-controllers) and algorithms
(for e.g. signal processing, multimedia-based algorithms). In vision and image processing,
the focuses are on neural network applications, machine vision algorithms, image and video
content retrieval, 3-D vision, image compression, wavelet applications, medical imaging,
and parallel processing algorithms. |
Health monitoring
over
the web,
Biomedical
Engineering Laboratory
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Drives,
Power & Control Systems Group
The Drives, Power & Control Systems group
is organised in 2 sections:
a) Drives & Power
Systems section, and
b) Control System section
Drives & Power Systems
section
The Drives
& Power Systems section comprises 12 academic staff members. Current teaching and research activities are
centered around 4 laboratories: Power Systems Laboratory, High Voltage
Laboratory, Electrical Machines
& Drives Laboratory and Power Electronics Laboratory.
| Current research focuses are on power
electronics, electric drives and control, operation and control of power systems,
lightning and lightning protection, fuzzy control, neural networks and expert systems.
Significant achievements include development of a high-speed fluid bearing spindle motor,
development of a new generation power supply product, application of artificial neural
networks in power system operation, high performance electric drives, high efficiency
single phase AC-DC power factor correction, and intelligent online decision support for
control and operation of power distribution system. |
Developing a set of
integrated platform
for research on
electrical drives,
Electrical Machines
& Drives Laboratory
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Control System section
Teaching in the
Control System section serves to impart basic and advanced control knowledge to undergraduate and
graduate students while research activities have concentrated on the general field of
intelligent control, control system design, engineer and technology development. Currently
the Control System section has three well-equipped laboratories, namely, the Control and
Simulation Laboratory, Mechatronics and Automation Laboratory and the Advanced
Control Technology Laboratory.
| Current research focuses are on
automatic tuning methods, adaptive control systems, neural and fuzzy control, intelligent
motion control, computer-aided engineering of advanced controllers, and knowledge-based
control using expert system methodologies. In addition to the above fundamental research,
the activities of the section also encompass the design, testing and practical
applications of advanced control theory. |
Array of heaters,
Advanced Control
Technology Laboratory
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Microelectronics Group
The research activities
in the group are carried out at Center of Optoelectronics, Center for
Integrated Circuit Failure Analysis and Reliability, the Microelectronics
Laboratory, MOS device laboratory, Optical Crystal Laboratory, the Laser
Microprocessing Laboratory, the Microsensor Laboratory, the Information
Storage Materials Laboratory, and Signal Processing and VLSI Design Laboratory.
In
VLSI design, current research interests include high-speed circuits and device modeling,
mixed-signal ASIC, MEMS interface, and low voltage low-power analog ICs. In information
storage materials, the current research focuses are on micro-magnetic modeling,
fabrication of nano-structures, development of characterization techniques,
characterizations of thin films, new materials for information storage, and interface
studies. In laser microprocessing, the current research focuses are on ultrafast (ps, fs)
cool laser processing, laser-plasma combined processes, laser-SPM-combined nanoprocessing,
laser cleaning and deflash, and laser-materials interactions and different energy,
wavelength and pulse duration regions. In silicon IC technology, research interests lie in
new gate dielectric materials, new silicide materials, ultra-shallow junction and advanced
thermal process, new substrate materials, and new gate electrode and etching technologies.
In sensors and MEMS, current research focuses are on microbolometers, new readout schemes
for on-chip correction, large format (320x240) microbolometer array, and high sensitivity
uncoolled IR camera. Research interests in IC reliability and instrumentation include MOS
device reliability physics and characterization, NANO characterization techniques, optical
beam techniques, and electron/Ion beam techniques. In optical crystal growth and
applications, the current research focuses are on non-linear optical crystals for blue SHG
applications, frequency-conversion crystals for UV or deep UV laser light generation,
photorefractive crystals for holographic data storage applications, and holographic and
optical disk recording system development based on photopolymer media. In optoelectronics,
the current research interests are on optoelectronic materials and devices, laser
microprocessing, and optical crystals and magnetic media.
| Significant
achievements include a number of world first reports of exciton localization in
InGaAlAs/Inp, phonon replicas in AlGaAs/GaAs, high frequency optical intensity
oscillations in nipi structures and gain calculations in InGaN lasers. Other significant
achievements include the patented SEMICAP and other failure analysis systems such as
Spectroscopic Photon Emission Microscopy System (SPEMS) and Cathodoluminescence 300
(CL300) which have won several prizes and have been successfully marketed in many
countries through Image Transforms, a NUS spin-off company. |
Holographic Storage,
Optical Crystal Laboratory
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