Ultrawideband Antennas for Microwave Imaging Systems

Ultrawideband Antennas for Microwave Imaging Systems PDF

Author: Tayeb A. Denidni

Publisher: Artech House

Published: 2014-08-01

Total Pages: 211

ISBN-13: 1608077152

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This book presents ultrawideband antennas and their applications on microwave imaging. The chapters focus on recent techniques, analysis, and applications along with the future vision of this emerging field of applied electromagnetics. Several emerging topics are essayed, including dielectric resonator antennas and planar ultrawideband antennas for microwave imaging. This resource incorporates modern design concepts, analysis, and optimization techniques based on recent developments. Readers are also provided with an extensive overview of current regulations, including those related to microwave effects in biological tissues.

Ultra Wideband Antennas

Ultra Wideband Antennas PDF

Author: Giselle M. Galvan-Tejada

Publisher: CRC Press

Published: 2017-12-19

Total Pages: 295

ISBN-13: 148220651X

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Ultra Wideband Antennas: Design, Methodologies, and Performance presents the current state of the art of ultra wideband (UWB) antennas, from theory specific for these radiators to guidelines for the design of omnidirectional and directional UWB antennas. Offering a comprehensive overview of the latest UWB antenna research and development, this book: Discusses the developed theory for UWB antennas in frequency and time domains Delivers a brief exposition of numerical methods for electromagnetics oriented to antennas Describes solid-planar equivalence, which allows flat structures to be implemented instead of volumetric antennas Examines the impedance matching, phase linearity, and radiation patterns as design objectives for omnidirectional and directional antennas Addresses the time domain signal analysis for UWB antennas, from which the distortion phenomenon can be modeled Includes illustrative examples, design equations, CST MICROWAVE STUDIO® simulations, and MATLAB® plot generations Compares the performance of different UWB antennas, supplying useful insight into particular tendencies and unresolved problems Ultra Wideband Antennas: Design, Methodologies, and Performance provides a valuable reference for the scientific community, as UWB antennas have a variety of applications in body area networks, radar, imaging, spectrum monitoring, electronic warfare, wireless sensor networks, and more.

Ultra Wideband Antennas

Ultra Wideband Antennas PDF

Author: Giselle M. Galvan-Tejada

Publisher: CRC Press

Published: 2017-12-19

Total Pages: 295

ISBN-13: 1351831402

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Ultra Wideband Antennas: Design, Methodologies, and Performance presents the current state of the art of ultra wideband (UWB) antennas, from theory specific for these radiators to guidelines for the design of omnidirectional and directional UWB antennas. Offering a comprehensive overview of the latest UWB antenna research and development, this book: Discusses the developed theory for UWB antennas in frequency and time domains Delivers a brief exposition of numerical methods for electromagnetics oriented to antennas Describes solid-planar equivalence, which allows flat structures to be implemented instead of volumetric antennas Examines the impedance matching, phase linearity, and radiation patterns as design objectives for omnidirectional and directional antennas Addresses the time domain signal analysis for UWB antennas, from which the distortion phenomenon can be modeled Includes illustrative examples, design equations, CST MICROWAVE STUDIO® simulations, and MATLAB® plot generations Compares the performance of different UWB antennas, supplying useful insight into particular tendencies and unresolved problems Ultra Wideband Antennas: Design, Methodologies, and Performance provides a valuable reference for the scientific community, as UWB antennas have a variety of applications in body area networks, radar, imaging, spectrum monitoring, electronic warfare, wireless sensor networks, and more.

Ultra-wideband Dielectric Resonator Antennas for Communication and Microwave Imaging Applications

Ultra-wideband Dielectric Resonator Antennas for Communication and Microwave Imaging Applications PDF

Author: Seungwoo Ryu

Publisher:

Published: 2010

Total Pages: 276

ISBN-13:

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Since the Federal Communication Commission (FCC) allowed the 3.1-10.6GHz unlicensed band for UWB communication, Ultra-wideband (UWB) systems have attracted great attention in the wireless worldwide because of their advantages, including high speed data rate, extremely low spectral density, high precision, low cost, and low complexity. As in the case in conventional wireless communication systems, antennas play a very crucial role in UWB systems. However, there are more challenges in designing a UWB antenna than a narrow band one. UWB antennas should have sufficient impedance bandwidth, and in some cases it is required to have band-notch characteristics to avoid interference with other bands for the communication system. For radar and sensor applications it is required to have constant group delay to achieve better pulse shape for the microwave signal. Here we show several promising UWB antennas to overcome several difficulties. The interference problem of the wireless communication systems is resolved by adding strip(s) to a UWB antenna, which can control not only the rejection frequency as well as the width of the band-notch. The efficiency problem of UWB antennas is resolved by using a Dielectric Resonator as a radiating element, because DRAs provide higher than 98% radiation efficiency. The radiation pattern problem of the monopole UWB antennas is also solved by the characteristics of the DRA, because there are no edge currents as in the printed antennas. Also, the volume characteristic of DRAs provide small size at the expense of the thickness compared with the printed antennas, because the maximum path length in a certain direction can be reduced to the other introduced direction. To solve the radiation pattern problem of the UWB DRA with broadside pattern, we introduce a gap between the DR and the ground plane edge to make balanced the electric field between both sides, and eliminate some disordered field at two spots that affect the radiation patterns. Therefore, we removed the dielectric materials from these spots to shift the resonant frequency of these modes far away from our frequency band of interest and to leave a well structured higher order field distribution. Due to very good characteristics of the UWB DRA with broadside pattern such as the high antenna efficiency, nearly constant gain, consistent radiation pattern, compact size, and very low variation of the group delay, we apply this sensor to the breast tumor detection for proving the performance in a radar sensor application. Our sensor provides very wide half power beamwidth, so that it can scan whole breast even if the location of the sensor is close to or in contact with the breast skin. Also, the compact size of our proposed sensor allows a large number of sensors to be placed around the breast. In addition, the small variation of the point source makes a very compact image of the breast tumor.

Body Matched Antennas for Microwave Medical Applications

Body Matched Antennas for Microwave Medical Applications PDF

Author: Li, Xuyang

Publisher: KIT Scientific Publishing

Published: 2014-01-23

Total Pages: 230

ISBN-13: 3731501473

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In this work, new concepts of body-matched antennas for microwave medical applications were developed, where the antennas are placed directly on or in the human body. Two types of antennas were designed - on-body matched antennas for diagnosis and implantable antennas for data telemetry with the main focus of miniaturization yet maintained a high radiation performance. The applicability of the antennas was verified using a medical imaging system for the detection of hemorrhagic stroke.

Ultrawideband Antennas

Ultrawideband Antennas PDF

Author: Daniel Valderas

Publisher: World Scientific

Published: 2011

Total Pages: 210

ISBN-13: 1848164912

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Ultrawideband (UWB) technology, positioned as the cutting edge of research and development, paves the way to meet the emerging demands set by broadband wireless applications, such as high-speed data transmission, medical imaging, short-range radars, electromagnetic testing, etc. This breathtaking resource builds upon the basics of UWB technology to provide a complete compilation of figures of merit along with a vital state-of-the-art of the different antenna alternatives that are to be employed according to the specific application. Without excessive recourse to mathematics, this volume emphasizes on the UWB antenna design and equips readers with practical prediction techniques based on simple formulas and models. The big picture of UWB antenna technology would not be complete without addressing its applications, and this will serve to provide consultants with key clues for slot market searching. Containing over 150 supporting illustrations and figures, this comprehensive overview of UWB technology, antenna design and applications is a vital source of information and reference for R&D organizations, researchers, practitioners, consultants, RF professionals and communication engineers.

Handbook of Ultra-Wideband Short-Range Sensing

Handbook of Ultra-Wideband Short-Range Sensing PDF

Author: Jürgen Sachs

Publisher: John Wiley & Sons

Published: 2013-01-15

Total Pages: 802

ISBN-13: 3527651837

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Ranging from the theoretical basis of UWB sensors via implementation issues to applications, this much-needed book bridges the gap between designers and appliers working in civil engineering, biotechnology, medical engineering, robotic, mechanical engineering, safety and homeland security. From the contents: * History * Signal and systems in time and frequency domain * Propagation of electromagnetic waves (in frequency and time domain) * UWB-Principles * UWB-antennas and applicators * Data processing * Applications

Band-Notch Characteristics in Ultra-Wideband Antennas

Band-Notch Characteristics in Ultra-Wideband Antennas PDF

Author: Taimoor Khan

Publisher: CRC Press

Published: 2021-06-08

Total Pages: 128

ISBN-13: 1000383997

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This book comprehensively reviews ultra-wideband (UWB) and UWB multi-input multi-output (MIMO) antennas with band-notched characteristics, with a focus on interference cancellation functionality. The book is organized into seven chapters that cover single band, dual band, and multi band-notched UWB antennas, followed by band-notched characteristics in UWB (MIMO) antennas. Further, it explains the mechanism of reconfigurability and tunability in band-notched UWB antennas, including advanced applications of UWB systems. Overall, it covers different techniques of canceling the electromagnetic interference in UWB in a concise volume. Features Provides a comprehensive presentation of avoiding interference in UWB systems Reviews state of the art literature related to UWB antennas, filtennas, and various reconfigurable technologies Explains different techniques for producing band-notch characteristics in UWB systems Includes discussion on historical perspectives of UWB technology Consolidates different research activities carried out on the electromagnetic interference cancellation techniques in the UWB communication systems Band-Notch Characteristics in Ultra-Wideband Antennas is aimed at researchers and graduate students in electrical and antenna engineering. Taimoor Khan has been an Assistant Professor at the Department of Electronics and Communication Engineering, National Institute of Technology Silchar since 2014. In addition to this, Dr. Khan has also worked as a Visiting Assistant Professor at Asian Institute of Technology Bangkok, Thailand during September–December, 2016. His active research interests include Printed Microwave Circuits, Electromagnetic Bandgap Structures, Ultra-wideband Antennas, Dielectric Resonator Antennas, Ambient Microwave Energy Harvesting, and Artificial Intelligence Paradigms in Electromagnetics. Dr. Khan has successfully guided three Ph.D. theses, and is supervising six Ph.D. students. He has published over 75 research articles in well-indexed journals and in world-renowned conference proceedings. Currently, he is executing three funded research projects, including two international collaborative SPARC and VAJRA research projects. In September 2020, Dr. Khan has been awarded a prestigious national IETE-Prof SVC Aiya Memorial Award for the year 2020. Yahia M. M. Antar has been a Professor at the Department of Electrical and Computer Engineering, Royal Military College of Canada since 1990. He served as the Chair of CNC, URSI from 1999 to 2008, Commission B from 1993 to 1999, and has a cross appointment at Queen’s University in Kingston. He has authored and co-authored over 250 journal papers, several books and chapters in books, over 500 refereed conference papers, holds several patents, has chaired several national and international conferences, and has given plenary talks at many conferences. Dr. Antar is a fellow of the Engineering Institute of Canada, the Electromagnetic Academy, and an International Union of Radio Science (URSI). He was elected by the URSI to the Board as the Vice President in 2008 and in 2014, and to the IEEE AP AdCom in 2009. In 2011, he was appointed as a member of the Canadian Defence Advisory Board (DAB) of the Canadian Department of National Defence. He serves as an Associate Editor for many IEEE and IET Journals, and as an IEEE-APS Distinguished Lecturer. Presently, he is working as President-Elect for IEEE Antenna and Propagation Society for the year 2020.