Important DatesExtended Paper Submission Deadline: June 30, 2009 Extended Acceptance Notification: July 25, 2009 Advance Registration Deadline: August 15, 2009 |
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Tutorial for ISAP 2009 Complimentary for all attendants October 20, 2009 (13.00 -16.00)
Miniaturization Methods for UWB and Multiband Antennas John L. Volakis, Chi-Chih Chen and Kubilay Sertel The
Abstract This short course will cover several topics related to small antennas for narrowband and ultrawideband applications. The course will start with a presentation on small antenna performance limits for narrowband and UWB antennas followed by methods for achieving miniaturization. Techniques such as (a) inductive/capacitive loading (lumped or distributed RF circuits), (b) shaping, (c) matching circuits (passive and active), (d) novel modes and metamaterials and (d) materials and composites will be presented. Antenna examples will include (a) miniature spirals (from VHF and higher) (b) GPS and SATCOM, (c) conformal arrays, including the current sheet wideband array, (d) RFIDs, (e) Spirals and other conformal wideband antennas, (f) Polymer-based and Carbon Nanotube (CNT) antennas, (g) on-chip and mm-wave antennas, (h) body-worn antennas with diversity, and (i) a variety of printed designs on layered textured dielectrics. A good part of the course will be devoted to metamaterial antennas, particularly on substrates and coupled circuit lines that emulate anisotropy for achieving optimal gain x bandwidth limits. Multistage passive and active impedance matching will be also discussed. OUTLINE
--Review of Antenna Parameters Efficiency, Directivity, Gain, Impedance, Polarization
- Q limits - Performance limitations: gain, bandwidth, pattern, impedance
- Shaping - Artificial transmission line concept (loading using LC circuits) -- Material loading --Magnetic Materials - Metamaterials and novel resonance modes -- Emulating anisotropy using printed circuits
- Optimization approaches - Interfacing optimization and antenna analysis tools - Data mining approaches for optimal multi-objective designs
- Narrowband miniature antennas: dipoles, patches, GPS, SATCOM, body-worn, RFID etc. - Broadband miniature antenna: bowties, spirals, helices, new shapes
Biography John (Yiannis) L. Volakis obtained his Ph.D. from the Ohio State Univ. in 1982. After 2 years at Boeing Phantom Works, in 1984 he was appointed Assistant Professor at The Univ. of Michigan, becoming a full Professor in 1994. Since Jan. 2003, he has been the R.&L. Chope Chair Professor at The Ohio State University, Electrical and Computer Engineering Dept.. He also serves as the Director of the ElectroScience Laboratory with $7.2M in external research funding. Over the years he has carried out research on diffraction theory and radar scattering, antennas, computational methods, electromagnetic compatibility and interference, propagation, design optimization, RF materials, multi-physics engineering and ioelectromagnetics. His publications include 4 books (including the 4th ed. classic Antenna Engineering Handbook), 260 journal papers and over 400 conference papers. He has graduated/mentored nearly 60 doctoral students/post-docs with 10 of them having co-authored papers that won awards at international conferences. He has served as Associate Editor of several journals, was twice the general Chair of the IEEE Antennas and Propagation Symposium, and in 2004 he was the IEEE Antennas and Propagation Society President. He is also listed by ISI among the top 250 most referenced authors John L. Volakis, Chi-Chih Chen and Kubilay Sertel The
Small Antennas for Multiband Wireless Communication Devices Kin-Lu Wong, IEEE Fellow Sun Yat-sen Chair Professor, Electrical Engineering Department Vice President, http://antenna.ee.nsysu.edu.tw Tel: +886-7-5252000 ext 4161, Fax: +886-7-5254199 Email: wongkl@mail.nsysu.edu.tw
Abstract 1. The course title: "Small Antennas for Multiband Wireless Communication Devices" 2. The course abstract: Small antennas in the form of printed antennas, metal-plate antennas, ceramic chip antennas, and the like are demanded for achieving multiband operation in modern wireless communication devices. Small multiband antennas can find extensive applications in WWAN (850/900/1800/1900/2050 MHz bands), WLAN (2.4/5.2/5.8 GHz bands), WiMAX (2.5/3.5/5.5 GHz bands), UWB (3.1~10.6 GHz band) systems, and other related communications systems. Many innovative small multiband antennas for related applications such as in the internal handset/laptop antennas, WLAN/WiMAX antennas, and UWB antennas have been reported recently. These recently developed small multiband antennas will be addressed. The SAR (specific absorption rate) and HAC (hearing aid compatibility) results of some promising internal handset antennas for practical applications will also be discussed. The topics for this short course will include: (1) Internal multiband handset/laptop antennas for WWAN systems, including using the printed monopole (λ/4 and λ/8 mode excitation), PIFA (λ/4 and λ/8 mode excitation), loop (lλ, λ/2 and λ/4 mode excitation) and slot (λ/2 and λ/4 mode excitation) antennas; the printed antennas can have a very small size for penta-band WWAN operation and are suitable to be directly printed on the system circuit board of the mobile device, hence allowing the mobile device to have a very thin profile. The concept for EM compatible (EMC) internal mobile device antennas will also be introduced. (2) WLAN/WiMAX antennas, including dual-band and/or diversity operations for mobile devices. Promising antennas with broadband CP (broadside and omnidirectional) radiation, high-gain omnidirectional radiation and diversity operation for access points will also be presented. (3) UWB antennas for mobile devices and access points, including the design techniques for UWB impedance matching, improved omnidirectionality, pattern stability, polarization purity and band-notching. 3. The course prerequisite: For senior or graduate students or antenna engineers/scientists interested in wireless communication antenna design, especially for internal antenna design for mobile communication devices. 4. Course instructor: Kin-Lu Wong, see the biography below.
Kin-Lu Wong, IEEE Fellow Sun Yat-sen Chair Professor, Electrical Engineering Department Vice President, http://antenna.ee.nsysu.edu.tw Tel: +886-7-5252000 ext 4161, Fax: +886-7-5254199 Email: wongkl@mail.nsysu.edu.tw
Antennas for Body-Centric Wireless Communications Koichi Ito Department of Medical System Engineering Abstact In recent years, a study on body-centric wireless communications has become an important and active area of research because of their various applications such as e-healthcare, support systems for specialized occupations, indoor security systems and personal communications. The outline of this new Short Course is as follows: 1. Introduction 2. Basic study 3. Wearable antennas 4. Wearable devices at VHF band 5. Implantable antennas 6. Evaluation with human phantoms 7. Conclusions and future work Since candidate frequencies for body-centric wireless communications widely range from MHz to GHz, dielectric properties of the human body tissues, relative dimensions of the human body to wavelength at the frequency, and the propagation channels around the human body extremely vary with frequencies. In Section 2, to bring objective and unified idea on the frequency dependence, electric field distributions around the human body wearing a small antenna in a wide frequency range of 2.5 MHz to 2.5 GHz are numerically calculated. Section 3 overviews wearable antennas to be used in GHz or UWB range. Many different types of wearable antennas have been developed and reported. They should be compact and flexible, and sometimes even washable. On the contrary, in Section 4, wearable devices at VHF band are introduced. These devices utilize the human body as a transmission channel and they consume quite low energy. Such wearable devices have been developed especially in Section 5 introduces implantable antennas which are used for particularly medical and security applications. As an example, a cavity slot antenna operating at 2.45 GHz is proposed for a short-rang wireless communication system. Because these antennas are used on or in the human body, human phantoms are indispensable to evaluate antenna performance as well as SAR (Specific Absorption Rate) distributions. In Section 6, firstly various types of numerical phantoms or human models which are used for theoretical analysis and computational simulation are briefly introduced. On the contrary, tissue-equivalent liquid, gel, semi-hard or solid phantoms are usually used for experimental evaluation. Some different experimental phantoms are introduced and compared. Finally, conclusions and future work are described in Section 7. Biography
Dr. Ito is a Fellow of the IEEE, a Fellow of the IEICE (Institute of Electronics, Information and Communication Engineers, Japan), a member of the American Association for the Advancement of Science, the Institute of Image Information and Television Engineers of Japan (ITE) and the Japanese Society for Thermal Medicine (formerly, Japanese Society of Hyperthermic Oncology). He served as Chair of the Technical Group on Radio and Optical Transmissions, ITE from 1997 to 2001, Chair of the Technical Committee on Human Phantoms for Electromagnetics, IEICE from 1998 to 2006, Chair of the IEEE AP-S Japan Chapter from 2001 to 2002, TPC Co-Chair of the 2006 IEEE International Workshop on Antenna Technology (iWAT2006), Vice-Chair of the 2007 International Symposium on Antennas and Propagation (ISAP2007) in Japan, General Chair of iWAT2008 which was held in Japan in March 2008 and Co-Chair of ISAP2008 which was held in Taiwan in October 2008. He currently serves as an Associate Editor for the IEEE Transactions on Antennas and Propagation, a Distinguished Lecturer and an AdCom member for the IEEE Antennas and Propagation Society. He will serve as Chair of the Technical Committee on Antennas and Propagation, IEICE, from May 2009. Koichi Ito, Professor, D.E. Department of Medical System Engineering 1-33 Yayoi-cho, Inage-ku, Chiba-shi, 263-8522 E-mail: ito.koichi@faculty.chiba-u.jp / k-ito@ieee.org
RFID tags and other Applications and their Performance Enhancement using EBG’s and Metamaterials Raj Mittra Electromagnetic Communication Laboratory, 319 EE East, the rajmittra@ieee.org
Abstract The advent of new wireless devices and sensors have fueled a continuing trend toward the miniaturization of antenna size, and the challenges faced in designing these devices need to be met by innovations in antenna technology. As an example, modern cell phones routinely require antennas covering five bands or more, each band having stringent requirements with respect to bandwidth, efficiency and coupling. The design of such an antenna in a minimal space requires the right blend of high performance design strategies, appropriate simulation tools and adapted optimization schemes. Recently, systems such as WiMAX, UWB, MIMO and RFID have instigated the development of new techniques for designing small antennas with enhanced performance. This workshop will focus on the design of small antennas for a wide variety of applications, including sensors, RFID and multiband antennas. State-of-the-art design solutions for practical applications will be presented, and practical issues such as integration of small antennas into their environment will be discussed. Topics will include: Techniques for size reduction; bandwidth enhancement; multiband design; small antenna characterization; and, optimization techniques. The potential for using metamaterials and EBGs to enhance the performance of small antennas will also be discussed.
Raj Mittra is Professor in the Electrical Engineering department of the Raj is the President of RM Associates, which is a consulting organization that provides services to industrial and governmental organizations, both in the Raj Mittra Electromagnetic Communication Laboratory, 319 EE East, the rajmittra@ieee.org
From Fundamentals to Recent Developments Yahya Rahmat-Samii Distinguished Professor
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