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keynote speakers
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Keynote Speakers |
The title |
Abstract |
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Prof. Joshua Le-Wei Li
National University of Singapore |
Nano Electromagnetics: Recent Progress and Future Perspectives |
This talk will review the recent progress of the nano electromagnetic by examples. Specifically, it will look into the research areas of (a) Nano Antennas for the near field radiations, (b) Optical Waveguides for the near field optical wave propagation and also some optical wave shielding effects, and (c) Plasmonics for the surface optical wave polaritons and Plasmon resonances. Some latest results will be depicted and their potential applications discussed, especially when they will be applied for the medical imaging and biological sensors. While some practical examples will be shown, the talk will also address some and tough key issues in the state-of-the-arts research frontiers. Perspectives of future nano electromagnetics research and development will be briefed. |
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Prof. David Thiel
Griffith University |
Sustainable Electronics: Wireless systems with minimal environmental impact |
Global warming, greenhouse gas emissions and e-waste are all major issues world-wide. Antennas are now a very common component in most consumer electronic devices (eg computers, telephones, PDA, etc) in addition to RFID systems used for product management and animal husbandry. In moving to RHoS and WEEE compliant systems, antenna engineers must consider new materials in antenna mass-manufacturing. Of course, minimal system energy use requires radiation efficiency and perhaps, electronic beam steering. This paper reports on the design and manufacture of antenna systems which greatly reduce the "carbon footprint" of wireless systems. |
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Prof. Makoto Ando
Tokyo Institute of Technology |
Physical Optics:
Everlasting improvements to the classical approximation for the updated diffraction analyses |
Physical Optics (PO) is one of the classical methods for diffraction analysis as well as the antenna design. It is simple and has wide applicability though it is inferior to other latest diffraction theories in terms of the accuracy. The talk first extracts the mechanism of approximation and the errors inherent to PO. Then several new ideas and findings developed by the author in the study for improving PO are introduced. They include “modified edge representation(MER)” for surface to line integral reduction, “modified surface normal vectors” for accuracy enhancement up to GTD, “Fresnel zone number” utilized for hybridization with MOM and the MER line integral expression of the geometrical optic (GO) terms. Finally, the relations with the geometrical theory of diffraction (GTD) and the method of moment (MoM) are mentioned.
Based upon these techniques, PO still remains to be the powerful tool in terms of accuracy as well as the wide applicability. |
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Prof. Michael A. Jensen
Brigham Young University |
Multi-Antenna Communication Systems: Propagation Channel Characterization and Antenna Design Considerations |
The rapid adoption of wireless connectivity has resulted in an insatiable demand for high wireless data rates. However, the increased throughput must be 1) achieved without dramatically increasing the spectral occupancy of the wireless signal and 2) maintained even in the presence of channel impairments such as multipath propagation or multi-user interference. Multi-antenna systems using multiple-input multiple-output (MIMO) or antenna diversity technology show promise for providing dramatically increased performance in difficult wireless environments.
This talk examines antenna and propagation considerations for MIMO and diversity systems. The discussion reveals key physical characteristics of multipath propagation based on experimental measurements and illustrates the effectiveness of different mathematical propagation models. It then focuses on the antenna characteristics that maximize MIMO and diversity performance. The talk concludes with insights into open questions within this broad research field. |
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Prof. Wei Hong
Southeast University, China |
Ultra-Wideband Antenna Technology for the Application Environment with Multiple Wireless Communication Systems |
It is known that there already exist many widely used wireless communication systems, such as GSM, cdma2000, WCDMA, WLAN, WiMAX, Bluetooth etc., and people still continually propose new wireless communication systems, such as UWB and 4G systems etc. Different people often choose different kinds of systems for different purpose or favourite, thus it is a frequently appeared situation that there exist many different wireless communication systems in the same environment and at the same time.
Generally, different operation frequency bands are assigned to different wireless communication systems for avoiding the interference between these systems. However, for the environment that there are many wireless systems, only frequency division is not enough for anti-jamming, we have to explore other ways to depress the interference between these systems. One way to depress the interference of UWB systems to other narrow band systems is using UWB antennas with multiple notched frequency bands corresponding to other narrow band systems. Another way to depress the interferences from narrow band systems to UWB systems is using multi-band antennas. In this paper, the recent research progresses of such antennas in the State Key Laboratory of Millimeter Waves, Southeast University are reviewed. |
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Prof. Donglin Su
Beihang Universiy, China. |
A novel method of Top-level EMC Design Technology
for large and complex electronic information systems |
This paper presents a novel method of top-level EMC (electromagnetic compatibility) design technology for large and complex electronic information systems, such as aircraft. A Numerical Airplane Model(NAM) is build with EMC effects. Performance Simulation Models(PSM) of electronic-equipments are made. In order to ensure the NAM and PSM correct, the following information should be concerned, such as the structure of airplane and equipments, the relative locations of equipments, the specification and operation-principles of the electronic-equipments, and the inputs and outputs of the electronic-equipments, etc. The electromagnetic interference matrix (EIM) are build by a novel method, called “field-circuit hybrid method——ECHM”. The EIM is the function of bandwidth, sensitivity, polarization, signal characteristics, non-linear of front-and-end, receiver-antenna, radiation power, characteristics off-bandwidth, harmonious, intermodulation, transmitter antenna, location, and attenuation of cables, etc. Based on the ECHM and EIM and EMI/EMS performance, the safety of plane can be predicated. The safety lever of the equipments can be classified. The whole-plane’s EMC performance can be predicated. The top-level EMC specification can be set down. The top-level EMC specification can be disassembled to the sub-systems and equipments. The whole-plane EMC can be evaluated quantificational. The whole-plane EMC can be controlled quantificational. The methods presented in the paper have been applied to 3 kinds of planes. The validity of the above method has be proved. |
Professor Q.J. Zhang,
IEEE Fellow
Carleton University, Ottawa, Canada |
Advances in Modeling and Optimization Techniques for Microwave Design |
Modeling and optimization of high-frequency/high-speed microelectronic devices and systems are important for achieving next generation information technology and communication systems. Increasing circuit size and design complexity, coupled with stringent design specifications and shorter design cycles, demand tools that are faster, more accurate and automated than possible today. Electromagnetic (EM)/physics-based design accuracies will be needed not only at the component level, but also at the circuit and system levels. Models with EM/physics-oriented accuracy but without the computational expense of direct EM/physics simulations are necessary. Recent applications of neural networks for microwave design lead to new modeling and Computer-aided Design (CAD) with potential advantages in both speed and accuracy. Applications are being made in modeling and design of microstrip and CPW circuits, multilayer interconnects, embedded passives, printed antennas, LTCC circuits, semiconductor devices, measurement standards, filters, amplifiers, mixers and so on. New CAD methods for optimization, statistical design, global modeling, and computational electromagnetics exploiting computational intelligence concepts are being developed. Advanced microwave CAD methodologies such as knowledge-aided design, knowledge-based neural networks, and space mapping are being developed. This leads to new opportunities combining equivalent circuit/empirical models, EM/physics simulation, behavioral modeling, neural network and space mapping optimization algorithms for fast and accurate design of high-frequency components and systems.
This talk presents an overview of the state of the art in these emerging directions. The presentations highlight implementable methodologies for automated modeling and design of RF/microwave components, circuits and systems. The talk covers fundamental concepts and methodologies, industrial applications, and future trends in R&D. |
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