Plenary Speaker 1
Hiroyuki Arai, Yokohama National University
Title: High Gain Optical Beam Scanning Antenna and Its Measurement
This talk presents optical high gain beam scanning antenna for the future short-range wireless communication system. Base on the link budget of indoor system, we design high gain beam scanning antenna fabricated by silicon photonics technology. The antenna is leaky wave antenna consisted of waffled or waffle iron waveguide on silicon substrate. Its fundamental characteristics are shown by prototype optical antennas and a novel feeding structure called 2D photonic reflector is demonstrated. This talks also presents phase-less optical antenna pattern measurement technique to evaluate the optical antenna performance.
Biography:
Hiroyuki Arai received the D.E.in Physical Electronics from Tokyo Institute of Technology in 1987, and he is professor in Department of Electrical and Computer Engineering, Yokohama National University. His research includes mobile antenna systems and measurements. He developed diversity mobile terminal antennas, outdoor and indoor cellular base station antennas, DOA estimation systems and near/very near field measurement sytems.
He was editor-in-chief of IEICE Transactions on Communications, 2005-2007, chair of IEEE AP-S Japan Chapter, 2009-2010. chair of Technical Group on Antennas and Propagation of IEICE, 2013-2014. He is Fellow of IEEE and IEICE. He will serve general the chair of ISAP 2020, Osaka, Japan.
Plenary Speaker 2
Ibrahim Elshafiey, Electrical Engineering Department, King Saud University
Title : Adaptive Energy Concentration in Hyperthermia Treatment of Cancer
Defeating cancer is one of the major challenges to the research community. An emerging approach with the potential of reducing the side effects of conventional therapeutic methods depends on hyperthermia therapy. By elevating temperature, tumor cell vitality can be reduced, and treatment efficacy is enhanced. Various challenges still face the maturity of hyperthermia treatment. In particular, commercial systems use narrow band operation and implement single element applicator, which limit energy focus capability and negatively affect healthy tissue. This research aims at addressing some of the limitations of hyperthermia treatment.
A system is developed with multichannel structure to increase the number of degrees of freedom and improve performance. Novel techniques are implemented to design the electromagnetic (EM) applicator and power amplifiers (PA) modules targeting increasing the bandwidth, augmenting efficiency and improving linearity. Tools are presented for energy focus depending on phased array approach and genetic algorithm optimization. A robust technique is also introduced based on time reversal (TR) approach to enhance energy localization.
This ambitious system has limitations that can deter its clinical use. Techniques are required to deal with system complexity. EM energy is limited in targeting small size tumors. Power amplifiers nonlinearity can also distort energy localization. Feedback mechanism is necessary to guide waveform shaping.
Novel features are thus introduced to address these limitations. The concept of big-data-based treatment is introduced to deal with system complexity. Ultrasound (US) based energy transducers are hosted to target small sized deep malignant tissues. High-intensity-focused-ultrasonic HIFU scheme analysis is conducted using COMSOL multi-physics environment. A methodology is suggested based on digital pre-distortion (DPD) linearization approach to mitigate the nonlinear effects of PA elements. Nearfield high-resolution imaging techniques are presented based on compressed sensing methods as a novel non-invasive thermometry feedback mechanism.
Experimental facility is developed during the coursework of this research and is operated by undergraduate and graduate students. Remote operation system is designed to protect the operators, where high power field is confined into a shielded room. Waveform shaping subsystem is built based on software-defined radio (SDR) modules. Material characterization and specific absorption rate (SAR) assessment are performed using dielectric assessment kit and DASY 5 robotic system from SPEAG. An ultrasound-field-analysis system is installed with transducers, hydrophones, and a scanning tool from Precision Acoustics.
This research thus addresses practical challenges of clinical use of hyperthermia treatment. Success in this regards will provide a new paradigm to improve cancer treatment and help patients.
Biography
Dr. Ibrahim Elshafiey received his BS degree in communications and electronics engineering from Cairo University in 1985. He obtained his MS and PhD degrees in Electrical Engineering from Iowa State University in 1992 and 1994, respectively. He is currently a professor in the Electrical Engineering Department at King Saud University. His academic experience includes working at Fayoum University, and National Water Research Center, Egypt. He has also been a researcher at the University of Texas-Houston, Medical School, and at the Center for Nondestructive Evaluation, Ames, Iowa.
Dr. Elshafiey has authored and reviewed extended number of publications at various journals and conference proceedings. He has also been the PI of various funded research projects on the fields of medical imaging, hyperthermia treatment, communication systems, microsatellite remote sensing, radar systems, and aging aircraft inspection. His research interests include computational electro-magnetics, biomedical imaging, communication systems and nondestructive evaluation.
Plenary Speaker 3
Kunio Sakakibara, Nagoya Institute of Technology
Title: Multi-beam Antennas using Multi-layer Substrate in Millimeter-wave Band
Multi-beam antennas can cover wide angular area with high gain. Therefore, they are expected to be used for discrete beam scanning systems such as digital and analogue hybrid massive MIMO for 5G mobile communication systems and beam-scanning antennas for automotive radar systems in the millimeter wave band. We are in the development of various multi-beam antennas using multi-layer substrate. A Rotman-lens phase shifter is a feeding circuit for array antennas. Different beam-directions can be achieved by different phase inclination of the quasi lens feature in the parallel plate waveguide to the output ports assigned to each input port. A Butler matrix and a Blass circuit have a similar function. However, Rotman-lens operates broad frequency bandwidth due to the lens principle. On the other hand, the Rotman-lens suffers from loss consumed into the dummy ports and reduces aperture efficiency due to the deviation from the uniform output illumination. A Rotman lens multi-beam antenna with double-layer structure was developed in this work. Microstrip linear array antennas are connected to the output ports of the backed Rotman lens via microstrip-to-waveguide transitions. Consequently, a compact and low-profile multi-beam system was achieved. The beam-scanning performance of the fabricated antenna confirmed by electromagnetic simulation and measurement at 76 GHz band was presented in this talk.
Biography
Kunio Sakakibara was born in Aichi, Japan, on November 8, 1968. He received the B.S. degree in electrical and computer engineering from Nagoya Institute of Technology, Nagoya, Japan, in 1991, and the M.S. and D.E. degrees in electrical and electronic engineering from Tokyo Institute of Technology, Tokyo, Japan in 1993 and 1996, respectively. From 1996 to 2002, he worked at TOYOTA CENTRAL R&D LABS., INC., Aichi, and was engaged in the development of millimeter-wave antennas for automotive radar systems. From 2000 to 2001, he was with the Department of Microwave Techniques at the University of Ulm, Ulm, Germany, as a Guest Researcher. In 2002, he joined Nagoya Institute of Technology as a Lecturer. From 2004, he was an Associate Professor and he became a Professor in 2012. His research interest has been millimeter-wave antennas, feeding circuits and meta surfaces.
Plenary Speaker 4
Prof Lutfi Albasha, American University of Sharjah
Title: Smart Dental: A new Frontier?
Smart dental is becoming an area of interest for RF microelectronics researchers and dental practitioners. It promises to attract significant interest from industry. The ability to wirelessly monitor oral health with minimum power devices is clearly a major advantage. However, the mouth cavity does not allow for easy transmission of waves due to its complex structure and constantly changing and variable environment. In this presentation the speaker will discuss current trends in implantable devices for dental fixtures and orthodontics. The challenges in placing devices, including sensors and miniaturized antenna will be outlined. Recent work by the authors have shown that it is possible to embed self-powered especially designed devices into dental fixtures and use then for various monitoring purposes including teeth health and even on longer terms predict illnesses in the body.
Biography
Dr Albasha joined Sony Corporation after graduation and worked on commercial RFIC chip products. Hethen joined Filtronic Semiconductors as senior principal engineer and created an IC design team. The team supported the company foundry design ennoblement for mass production and taped-out its first commercial chips. He returned to Sony as lead principal engineer and worked on highly integrated RFCMOS transceivers for cellular and TV applications. Dr Albasha joined the American University of Sharjah in 2007 and he is now Professor of Microelectronics. His current areas of research interest are in energy harvesting, low power wearable and implantable devices, and integrated radar transceivers. Dr. Albasha received several outstanding Recognition Awards from Sony Corporation, the IET and the University of Leeds. He is an Associate Editor for the IET Microwaves, Antenna and Propagation Journal and served as President of the UAE Chapter of IEEE Solid-State Circuits Society for few years. Prof Albasha received his BEng and PhD degrees in Electronic and Electrical Engineering from the University of Leeds, UK.
Plenary Speaker 5
Chia-Chan Chang, Dept. of Electrical Engineering, National Chung-Cheng University, Taiwan
Title: Designs of Deformed Butler Matrix in 0.18 um-CMOS for Array Beamforming
The array beamforming is an essential feature in communication and radar systems but can become a great design challenge when it comes to System-on-Chip (SoC) integration. In this presentation, a novel folding technique is proposed to deform the conventional Butler matrix (BM) beamformer. The design concept is based on the mirror symmetry in the structure and the beamforming characteristics of conventional BMs. By embedding some switches from the feeding network into the internal BMs, the structure can be folded in half so that the number of building blocks and input ports can be saved. For demonstration, a 38-GHz 4×8 BM was designed and implemented using 0.18-um CMOS process. Measurement results of this proposed 4×8 BM MMIC show that eight orthogonal beams can be successfully generated, while beam synthesizing capability is also achieved by properly controlling the switches, providing more design freedom in system design.
Biography
Prof. Chia-Chan Chang received the B.S. degree in communication engineering from National Chiao-Tung University, Hsinchu, Taiwan, in 1995, the M.S. and Ph.D. degrees in Electrical and Computer Engineering from the University of California at Davis (UCD), CA, USA in 2001 and 2003, respectively. She joined the faculty of the Dept. of Electrical Engineering at National Chung-Cheng University, Chiayi, Taiwan in 2004, becoming a full Professor since 2015. She also holds a joint appointment with the Dept. of Communications Engineering. She has published over 70 technical papers and has contributed to five books. Her current research interests include phased antenna array and beamforming technologies, microwave/millimeter-wave integrated circuit designs, reconfigurable circuit designs, radar technology and.its application in bio-sensing and positioning.
Plenary Speaker 6
Prof. Qing-Xin Chu, South China University of Technology, China
Title : Design of Broadband Base-Station Antennas Based on Control of Modes
At present, mobile communication has entered the fifth generation, 5G. New applications and requirements have posed unprecedented challenges to the design of base-station antennas. On the one hand, the antennas need to work in a wide frequency range in order to satisfy the simultaneous operation of multiple communication systems of different generations. On the other hand, in order to reduce the space occupied by base-station antennas, multiple arrays need to have a common aperture, that is, they need to share one reflector plate and one antenna radome, and RF modules even need to be directly integrated into the antenna, therefore the antenna elements are required to be as small as possible. In fact, conventional broadband antennas either can not meet the requirements or they are too large. Traditionally, the designs of compact broadband antennas are mainly based on full-wave simulation software and experimental adjustment, lack of the direction of theoretical foundation or mechanism. Based on the concept of the mode control from input impedance, this talk proposes the broadband mechanism and design method of multi-mode compact antennas, in which the broadband antennas can be realized almost without increasing the antenna size. The proposed method has been applied to design many broadband antennas for the mobile base stations.
Biography
Qing-Xin Chu is the chair professor with the School of Electronic and Information Engineering, the director of the Research Institute of Antennas and RF Techniques, the director of the Engineering Center of Antennas and RF Techniques of Guangdong Province, the director of the Electrical Information and Control National Experimental Teaching Demonstration Center in South China University of Technology. He is the founder and chair of IEEE Guangzhou AP/MTT Chapter, vice-chair of China Electronic Institute (CEI) Antenna Society, IEEE Fellow and CEI Fellow. His undergraduate course “Radio Frequency Circuit and Antenna” was rated as the national high-quality course in 2009, and the national high-quality resource-sharing course in 2012. He was awarded with the title of excellent teacher of Guangdong Province in 2010. He has published 1 book and more than 700 academic papers with SCI citations more than 4000 times, especially more than 70 of which has been published in the IEEE Transactions on Microwave Theory and technology, IEEE Transactions on Antennas and Propagation. Since 2008, many papers became the top ESI (Essential Science Indicators) papers, In 2018, 8 papers (2 for 1% and 6 for 3%) were selected for ESI highly cited papers. Since 2014, he has been selected as the highly cited scholar of China in electrical and electronic engineering field by Elsevier every year. It has been authorized more than 70 Chinese invention patents. He was the recipient of the Science Award by CEI in 2018 and 2016, the Science Award by Guangdong Province of China in 2013, the Science Awards by the Education Ministry of China in 2008 and 2002, the Fellowship Award by Japan Society for Promotion of Science (JSPS) in 2004, the Singapore Tan Chin Tuan Exchange Fellowship Award in 2003, the Educational Award by Shaanxi Province in 2003. His current research interests include antennas and microwave filters in wireless communication, spatial power combining technology.
Plenary Speaker 7
Professor Dr Mohamad Kamal A Rahim, Advanced RF and Microwave Research Group, School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia
Title : Antenna with Artificial Magnetic Conductor for Wireless Application
Metamaterials are designed to exhibit electromagnetic properties that cannot naturally be found in nature. Artificial Magnetic Conductor (AMC) can mimic the characteristic of the Perfect Magnetic Conductor (PMC) which is unnatural and does not exist in real life. AMC is also known as High Impedance Surface (HIS). Over a certain frequency band, AMC exhibits characteristic of in-phase reflection of electromagnetic waves forming a high impedance ground plane that is useful for antenna applications, especially for low profile and conformal antenna. Generally, AMC structures consist of periodical cells composed of metallic patches at the upper layer of a grounded dielectric substrate. Square patch AMC is the most common and simplest AMC structure. In recent years, the interest in investigating AMC structures to address the needs of various communication devices has gradually grown. By utilizing the unique characteristics of metamaterials which are not naturally existed, the performance enhancement of various microwaves devices can be accomplished. This talk elaborated on the technical perspective and recent works on AMC for antenna applications. The technical perspective discusses on the theoretical aspects, simulation design procedures, and the measurement setup used to characterize the AMC unit cell. Subsequently, various recent works of antenna design which involves the incorporation of AMC are discussed thoroughly. Each of the recent works is highlighted with specific performance enhancement that can be achieved by the use of AMC. The flexible textile AMC with flexible textile antenna will also be discussed for wearable application to enhance the transmission of the signal. The other applications of the AMC with antenna is for RFID detection on the metal. The employment of AMC has solves many issues whilst overcoming the typical limitations in conventional antenna design.
Biography
Mohamad Kamal A Rahim received the B Eng. degree in Electrical and Electronic Engineering from University of Strathclyde, UK, in 1987. He obtained his M.Eng Science from University of New South Wales Australia in 1992 and PhD degrees in Electrical Engineering from University of Birmingham UK in 2003. He is the Professor in RF/Microwave and Antenna at School of Electrical Engineering Universiti Teknologi Malaysia. His research interest include the areas of microstrip antennas, small antennas, microwave sensors, RFID antennas for readers and tags, Multi-function antennas, microwave circuits, EBG, artificial magnetic conductors, metamaterials, phased array antennas and design of millimeter wave frequency antennas. He has published over 350 articles in journals and conference papers. He received Distinguished Researcher during CITRA KARISMA 2018 and at the same year he was awarded as Top Research Scientist under Academy Science Malaysia.
Plenary Speaker 8
Professor Mohd Fadzil Ain, School of Electrical and Electronic Engineering, Universiti Sains Malaysia, Nibong Tebal 14300, Malaysia
Title : 28 GHz mmWave Quasi-Lumped Element Resonator Antenna on Air-Substrate
The increasing applications for nomadic computing have experienced enormous development over the preceding period. This has eventually prejudiced to the lack of bandwidth. Accordingly, to fulfil the consumers’ necessity, economical radiating elements needs to be constructed for the next generation wireless network. As a result, this paper presents a quasi-lumped element (LE) resonator antenna printed on an air-substrate. Copper (Cu) was employed to construct the quasi-LE model. The impacts of antenna’s and substrate’s thickness on bandwidth or resonant frequency have been studied. The finalized arrangement occupied 1219 mm2 extent and operated at 28 GHz with approximately 2 GHz bandwidth. The system displayed efficiency and peak gain values of 94% and 9.26 dBi, respectively. The primary objective of this article is to describe an antenna featuring cost-effective and simple design together with premium results for mmWave frequency band.
Biography
PROF. Ir. Dr. MOHD FADZIL AIN received the B.Eng in electronic engineering from Universiti Teknologi Malaysia, in 1997; the MSc. in radio frequency and microwave engineering from Universiti Sains Malaysia (USM), in 1999; and the PhD. in radio frequency and microwave from the University of Birmingham, United Kingdom in 2003.
In 2003, he joined the School of Electrical and Electronic Engineering, USM. He is Dean of School of Electrical and Electronic Engineering, and the Director of Collaborative Microelectronic Design Excellence Centre (CEDEC). He is actively involved in technical consultancy with several companies in repairing microwave equipment. His current research interests include MIMO wireless system on FPGA/DSP, Ka-band transceiver design, dielectric antenna, RF characterization of dielectric material, and microwave propagation study.
Professor Ir Dr Mohd Fadzil Ain awards and honors include International Invention Innovation Industrial Design and Technology Exhibition, International Exposition of Research and Inventions of Institution of Higher Learning, Malaysia Technology Expo, Malaysian Association of Research Scientists, Seoul International Invention Fair, iENA, Best Paper for the 7th WSEAS International Conference on Data Networks, Communications, Computers and International Conference on X-Ray & Related Techniques in Research and Industry
Plenary Speaker 9
Prof. Yoshihide YAMADA, Malaysia-Japan International Institute of Technology, UTM
Title : Aperture Antennas for 5G Mobile Base Stations
The fifth-generation (5G) mobile communication system will require the multi beam base station antennas. By taking into account a small antenna size at millimeter wave, any antenna types such as array, reflector and dielectric lens antennas become possible candidate. In this paper, aperture type antennas of reflector and lens are selected because of excellent multi beam performances. Fundamental antenna design technologies by a MATLAB software and expected radiation patterns by an electromagnetic simulator are shown.
Biography
Prof. Yamada received the B.E. and M.E. degrees on electronics from Nagoya Institute of Technology, Nagoya, Japan in 1971and 1973, respectively. And he received the D.E. degree on electrical engineering from Tokyo Institute of Technology, Tokyo, Japan in 1989.
In 1973, he joined the Electrical Communication Laboratories of Nippon Telegraph and Telephone Corporation (NTT). Till 1984, he was engaged in research and development of reflector antennas for terrestrial and satellite communications. From 1985, he engaged in R&D of base station antennas for mobile radio systems. In 1993, he moved to NTT Mobile Communications Network Inc. (NTT DoCoMo). In 1995, he was temporarily transferred to YRP Mobile Telecommunications Key Technology Research Laboratories Co., Ltd. At the same time, he was a guest professor of the cooperative research center of Niigata University, and a lecturer of Science University of Tokyo, both from 1996 to 1997. In 1998, he changed his occupation to a professor of National Defense Academy, Kanagawa, Japan. In 2014, he had started working as a professor at Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Kuala Lumpur, Malaysia. Now, he is interested in very small antennas, array antennas, aperture antennas and electromagnetic simulation of radar cross section. He received the best paper award and the best tutorial paper award from IEICE in 2013 and 2014, respectively. He is a Fellow member of the IEICE and a member of JSST of Japan. He is also a senior member of IEEE AP society and a member of the ACES.
Plenary Speaker 10
Prof. Widad Ismail, Universiti Sains Malaysia
Title : Size Reduction Percentage Study of 5G Hairpin Filter Non-uniform Transmission Line Resonator
A study on the maximum size reduction percentage of 5G Hairpin Bandpass filter (HPBF) nonuniform transmission line resonator is presented in this paper. Size reduction is obtained by applying Nonumiform Transmission Lines (NTLs) theory on each λ/2 uniform transmission line (UTL) resonator of the filter. To get the required compact-sized filter, some constraints should be applied to satisfy the matching condition in addition to meet the uniform transmission line filter design specifications. High Frequency Structure Simulator (HFSS) software and Computer Simulation Technology (CST) software are used in this study.
Biography
Widad Ismail is a professor and founder for the Auto-ID Research Laboratory (AIDL), Universiti Sains Malaysia (USM). She received her BEng(H) First Class Honors in Electronics and Communication Engineering from The University of Huddersfield, United Kingdom (1999) as the first woman engineer graduated with first class honors at the university. Then, at the age of 27, she obtained her PhD (2004) in Electronics and Electrical Engineering specializing in Active Integrated Antenna (AIA) with Image Rejection from the University of Birmingham, United Kingdom. Since the year 2000, she worked as a Postgraduate Teaching Assistant at the university for three years. Once graduated, she started her career at USM as a lecturer until today. In December 2014, she was promoted from Associate Professor to Professor at the School of Electrical and Electronics Engineering, USM which is the first woman professor in Electrical & Electronics Engineering at USM. Her main areas of research are wireless system design, Internet of things (IoT), RFID (Radio Frequency Identification), active integrated antennas (AIA) and RF and microwave systems engineering. Her research and scientific outputs have been translated to numbers of awards, publications and patents. To date, she is a Principal Investigator for 27 research grants. These research works have produced 4 granted and 4 filed patents, 10 international awards, 4 commercialized main research products and more than 170 publications including the international journal papers, conference/seminars and other publications. Furthermore, several incomes to the University are received mainly from the Commercialization of research innovative products and also the services as a principle consultant. In addition, there are more than 36 consultations and collaborations are established with various agencies and institutions which bridging the gap between the academicians to the industrialists. Currently, she is the main supervisor of 8 PhD students (active candidature) and she has graduated a total of 16 PhD and 16 Master’s students under her supervision and guidance. On top of these, she is also a member of IEEE and Wireless World Research Forum (WWRF).