WM1: Advances in Electrically Small Antennas and Materials for Handset Applications

Date: Monday, January 21, 2008
Time: 1:30 pm–5:30 pm
Organizers: James West, Rockwell Collins
Speakers:

James B. West, Rockwell Collins
Professor John Papapolymerou, Georgia Tech
Professor John Volakis/Dr. Chi Ch Chen, Ohio State
University ESL
Dr. Tayfun Ozdemir, Monarch Antenna, Inc.

This workshop will focus on the challenges and new antenna and materials technologies associated with hand set antenna design. The work shop will begin with a brief overview of antenna fundamentals and will describe the challenges associated with handset antenna design, such as band width vs. antenna size in wavelengths, pattern distortion due to asymmetric and electrically small ground planes, EMI/EMC issues, human body interactions, etc. After this introduction, industry expert lecturers will describe integrated antenna Systems-on-a-Package (SOP) technologies, Metamaterials advances, optimal bandwidth for electrically small structures, and adaptive self-structuring antennas that dynamically sense and adapt to their local electromagnetic environments.

WM2: Radio over fiber technologies

Date: Monday, January 21, 2008
Time: 8:30 Am–5:00 pm
Organizers:

Dr. Yongxin Guo, Institute for Infocomm Research, Singapore
Prof. Jianping Yao, University of Ottawa, Canada

Speakers:

Dr. Masayuki Izutsu, NiCT, Japan
Prof. Thas A Nirmalathas, University of Melbourne, Australia
Prof. Xianmin Zhang, Zhejian University, China
Prof. Woo-Young Choi, Yonsei University, South Korea
Prof. Jianping Yao, University of Ottawa, Canada
Dr. Michael Sauer, Corning USA
Dr. Nathan Gomes, University of Kent, UK
Dr. Jianjun Yu, NEC Laboratories America
Dr. Yongxin Guo, Institute for Infocomm Research, Singapore
Prof. Beatrice Cabon, Institut National Polytechnique de Grenoble, France

Distributing radio signals by means of optical fibers has been a topic of interest for over a decade. With the latest advances in fiber and photonics technology, there has been an explosive growth in this research area in the recent years while gaining more momentum moving ahead.

Radio over fiber techniques have recently been used to enhance and improve existing wireless coverage, especially in large venues such as airports and busy shopping malls with high human traffic. This is especially true for wireless access networks operating at high-frequency bands, in which the radio signals propagating from outdoor base stations encounter considerable difficulties penetrating the insides of large buildings and their basement levels.

A key strength of radio over fiber systems is their extremely wide bandwidth. This allows radio over fiber systems to concurrently transport a wide range of frequencies and air interface standards. For example, these can range from GSM at 800/1900 MHz, WLAN at 2.4/5 GHz, and future broadband wireless access networks operating at 60 GHz bands. The objective of this workshop is to introduce recent developments in radio over fiber techniques, including new cost-effective devices and system implementations for cellular, WLAN, UWB, millimeter-wave and Radar wireless applications using RF and photonic technologies.

1. Dr. Masayuki Izutsu, National Institute of Information and Communications Technology, Japan, “Light modulation devices for advanced radio over fiber technologies”
2. Prof. Thas A Nirmalathas, University of Melbourne, Australia, “Cost-effective radio-over-fiber technologies”
3. Prof. Xianmin Zhang, Zhejian University, China, “Wideband radio over fiber link for radar application”
4. Prof. Woo-Young Choi, Yonsei University, South Korea, “Fiber-fed wireless systems based on remote up-conversion techniques”
5. Prof. Jianping Yao, University of Ottawa, Canada, “Techniques for all-optical UWB pulse encoding”
6. Dr. Michael Sauer, Corning USA, “Short-distance fiber-radio transmission systems using VCSELs”
7. Dr. Nathan Gomes, University of Kent, UK, “Techniques for millimeter-wave over fiber communication systems”
8. Dr. Jianjun Yu, NEC Laboratories America, “Enabling technologies for optical wireless networks”
9. Dr. Yongxin Guo, Institute for Infocomm Research, Singapore, “RoF in the era of WiMedia UWB”
10. 10. Prof. Beatrice Cabon, Institut National Polytechnique de Grenoble, France, “RoF techniques for broadband access”

WM3: Uncertainty Management in Numerical Dosimetry Evaluations for Wireles Applications

Date: Monday, January 21, 2008 Cancelled
Time: 1:30 pm–5:30 pm Cancelled
Organizer: Fouad Hanna Victor, University of Paris
Speakers:

Andrei Grebennikov, M/A-COM
Wiart Joe, Wong Man-Fai, Lautru David, Fouad Hanna Victor, University of Paris

Rigorous Electromagnetic Simulations are intensively used in the field of bioelectromagnetism. The evaluation of the interactions between electromagnetic waves and biological tissues for wireless applications have became a worldwide public concern. Important efforts have been carried out to improve the numerical dosimetry estimation. Numerical methods, in particular
the FDTD, have been applied, enhanced by the improvements in computational power. The main question is how manage the uncertainty of the results in this particular domain. In numerical calculations, the uncertainty of result has been
reduced to the numerical accuracy of the methods. The main uncertainty of numerical simulations coming from the uncertainty related to the modelling (parameters such as meshing) and from the uncertainty of input data. For international standardization working groups, such as IEEE project 1528 or IEC pt62232, these are key questions with un-settled answers. This workshop will discuss the following challenges in numerical simulation:

• Estimation of the uncertainty related to the modelling.
  For instance, in numerical dosimetry the handset are often simplified. How can we estimate the associated uncertainty and how manage it?
  
  
• Estimation of the uncertainty related to the variability.
  The data used in numerical simulations are not exact. Due to industrial process or life variability, the input data should be described using statistical distribution. How can we estimate the uncertainty of output data associated to the uncertainty of input data. In numerical dosimetry, the morphology posture and internal anatomy has an effect on the power absorption distribution in human body. There is a challenge in how to develop methods to assess and manage these uncertainties. Colorado will discuss outphasing amplification using class D and Chireix combiner. This workshop will conclude with a panel session.