Electronic Microwave Imaging With Planar Multistatic Arrays

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Electronic Microwave Imaging With Planar Multistatic Arrays

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Author : Sherif Sayed Ahmed
language : en
Publisher: Logos Verlag Berlin GmbH
Release Date : 2014

Electronic Microwave Imaging With Planar Multistatic Arrays written by Sherif Sayed Ahmed and has been published by Logos Verlag Berlin GmbH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Computers categories.

Microwave imagers featuring a fully electronic scanning are highly demanded in security, industrial, and medical applications. Planar multistatic arrays operating at close ranges offer exceptional image resolution and illumination coverage compared to conventional far-field imaging. Novel solutions for synthesizing multistatic arrays for close range imaging with a scalable topology are introduced in this work along with detailed experimental verifications in the millimeter-wave range. Consequently, an electronic microwave imager based on modern digital-beamforming techniques has been successfully realized. High quality imaging of humans has been demonstrated, which represents a key milestone for the future generations of personnel screening systems required for securing air traffic as well as critical infrastructures. The work establishes the theoretical foundations for designing electronic microwave imagers, while addressing the associated challenges, e.g., image reconstruction, illumination adjustment, signal processing, hardware architecture, calibration technique, and results interpretation. The achieved three-dimensional complex-valued images open vast opportunities for new applications to effectively utilize the advanced capabilities of microwave imaging.

Large Aperture Array Radar Systems For Automotive Applications

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Author : Fabian Schwartau
language : en
Publisher: Cuvillier Verlag
Release Date : 2021-10-18

Large Aperture Array Radar Systems For Automotive Applications written by Fabian Schwartau and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-10-18 with Technology & Engineering categories.

The radar, besides camera and Lidar systems, is a core sensor to enable autonomous driving. The relatively limited angular resolution is the major drawback of the radar. This thesis shows the development of a conceptual future radar system for automotive applications. The focus is on providing a large antenna aperture to achieve the required high angular resolution. Two genetic algorithms are developed to optimize the antenna array for a good side lobe level while providing high angular resolution. Two demonstrators are built to implement certain aspects of the proposed radar system and prove the general concept viable. The first demonstrator features a large aperture with a limited side lobe level and is using a modular approach. The modules are synchronized with a radio over fiber system. The second demonstrator uses the previously proposed antenna array, which is implemented with a synthetic aperture radar approach. The system’s capabilities in a real scenario are demonstrated, and the reconstruction of a high-resolution three-dimensional image from the captured data is shown. Das Radar stellt, neben Kamera- und Lidar-Systemen, einen zentralen Sensor für das autonome Fahren dar. Dabei ist die relativ geringe Winelauflösung der primäre Nachteil des Radars. Diese Arbeit zeigt die Entwicklung eines konzeptionellen zukünftigen Radarsystems für automobile Anwendungen. Der Schwerpunkt liegt auf der Umsetzung einer großen Antennenapertur, um die erforderliche hohe Winkelauflösung zu erreichen. Zwei evolutionäre Algorithmen werden vorgestellt, um das Antennen-Array auf einen guten Nebenkeulen-Pegel zu optimieren und gleichzeitig eine hohe Winkelauflösung zu erreichen. Zwei Demonstratoren werden gebaut, um bestimmte Aspekte des vorgeschlagenen Radarsystems zu implementieren und die Durchführbarkeit des allgemeinen Konzepts zu zeigen. Der erste Demonstrator weist eine große Apertur mit einem begrenzten Nebenkeulen-Niveau auf und verwendet einen modularen Ansatz. Die Module sind mit einem Radio-over-Fiber-System synchronisiert. Der zweite Demonstrator verwendet die zuvor entworfene Antennenanordnung, die mit einem Radar mit synthetischer Apertur realisiert wird. Die Fähigkeiten des Systems werden in einem realen Szenario demonstriert und die Rekonstruktion eines hochauflösenden dreidimensionalen Bildes aus den erfassten Daten gezeigt.

Perspectives In Antenna Technology

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Author : Jeffrey S. Herd
language : en
Publisher: MIT Press
Release Date : 2025-03-11

Perspectives In Antenna Technology written by Jeffrey S. Herd and has been published by MIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-03-11 with Computers categories.

The definitive volume of recent innovations in antenna technology developed for a wide variety of system applications at MIT Lincoln Laboratory. Antenna technology plays a key role in enabling next-generation sensing and communications for ground-based, airborne, and spaceborne systems across a wide spectrum of frequencies and applications. Advances in RF microelectronics, commercial high-volume manufacturing and packaging, high-fidelity modeling and simulation tools, and affordable high-speed digital signal processing offer new options for next-generation antenna systems. Perspectives in Antenna Technology, by Jeffrey S. Herd, Alan J. Fenn, and M. David Conway, describes a variety of antenna research and development projects from MIT Lincoln Laboratory over the past fifteen years. In addition to highlighting current systems applications for the new antenna technologies, the book provides a modern perspective on the evolution of antenna technology at MIT Lincoln Laboratory. The contributors to this book are all from MIT Lincoln Laboratory. The developments covered include those aimed at reducing the cost of phased array antennas by leveraging high-volume printed circuit board manufacturing and highly integrated packaging techniques; novel solutions to enable ultra-lightweight deployable antennas for space and airborne applications; vector sensor arrays; two unique imaging radar systems, a video-rate microwave imaging system for person-borne concealed threat detection and a system capable of ultrawideband imaging of satellites; simultaneous transmit and receive (STAR) antennas; a variety of novel wideband array antennas, including dual-polarized stepped-notch arrays and coupled dipole arrays; and several types of custom millimeter wave (mmWave) antennas.

Microwave And Millimeter Wave Remote Sensing For Security Applications

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Author : Jeffrey A. Nanzer
language : en
Publisher: Artech House
Release Date : 2012

Microwave And Millimeter Wave Remote Sensing For Security Applications written by Jeffrey A. Nanzer and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Technology & Engineering categories.

Microwave and millimeter-wave remote sensing techniques are fast becoming a necessity in many aspects of security as detection and classification of objects or intruders becomes more difficult. This groundbreaking resource offers you expert guidance in this burgeoning area. It provides you with a thorough treatment of the principles of microwave and millimeter-wave remote sensing for security applications, as well as practical coverage of the design of radiometer, radar, and imaging systems. You learn how to design active and passive sensors for intruder detection, concealed object detection, and human activity classification. This detailed book presents the fundamental concepts practitioners need to understand, including electromagnetic wave propagation in free space and in media, antenna theory, and the principles of receiver design. You find in-depth discussions on the interactions of electromagnetic waves with human tissues, the atmosphere and various building and clothing materials. This timely volume explores recently developed detection techniques, such as micro-Doppler radar signatures and correlation radiometry. The book is supported with over 200 illustrations and 1,135 equations.

Physics And Applications Of Terahertz Radiation

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Author : Matteo Perenzoni
language : en
Publisher: Springer
Release Date : 2013-10-16

Physics And Applications Of Terahertz Radiation written by Matteo Perenzoni and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-16 with Science categories.

This book covers the latest advances in the techniques employed to manage the THz radiation and its potential uses. It has been subdivided in three sections: THz Detectors, THz Sources, Systems and Applications. These three sections will allow the reader to be introduced in a logical way to the physics problems of sensing and generation of the terahertz radiation, the implementation of these devices into systems including other components and finally the exploitation of the equipment for real applications in some different field. All of the sections and chapters can be individually addressed in order to deepen the understanding of a single topic without the need to read the whole book. The THz Detectors section will address the latest developments in detection devices based on three different physical principles: photodetection, thermal power detection, rectification. The THz Sources section will describe three completely different generation methods, operating in three separate scales: quantum cascade lasers, free electron lasers and non-linear optical generation. The Systems and Applications section will take care of introducing many of the aspects needed to move from a device to an equipment perspective: control of terahertz radiation, its use in imaging or in spectroscopy, potential uses in security, and will address also safety issues. The text book is at a level appropriate to graduate level courses up to researchers in the field who require a reference book covering all aspects of terahertz technology.

Radio Science

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Author :
language : en
Publisher:
Release Date : 2008

Radio Science written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Radio meteorology categories.

Sensor Imaging Systems For Real Time Applications

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Author : S. Kannadhasan
language : en
Publisher: CRC Press
Release Date : 2025-09-12

Sensor Imaging Systems For Real Time Applications written by S. Kannadhasan and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-09-12 with Technology & Engineering categories.

Recent sensor technologies have spurred innovation across many industries and have been employed worldwide to improve transportation, medical treatment, nanotechnology, mobile devices, virtual and augmented reality, and artificial intelligence. This new volume looks at different aspects and kinds of sensors, such as wearable radio frequency devices, machine learning algorithms for sensors, intelligent monitoring systems using RFID technologies, UV-based control systems, Booth algorithm-based sensors for improved multipliers, sensor data analysis using Arduino, piezoelectric sensor signaling, and more. Myriad examples of novel applications of sensor technology are presented in different areas, such as In disaster management, such as for accident detection and rescue systems For development of smart healthcare technology, such as for early prediction of breast cancer, monitoring and gauging of polluted air to alert for asthma triggers In transportation, such as in the development of smart helmets for protective driving, for vehicle-to-vehicle communication for accident prevention, for enabling vehicles to sense rough terrain In urban engineering/smart city management, such as for locating underground cable faults, for sewage surveillance for blockages and hazardous gases and chemical contaminants In agriculture, such as using sensors for agricultural pest control, using IoT for automated drip irrigation For residential and office use, such as for energy management systems, for monitoring ergonomic behaviors Other chapters present sensor technology for audio- and voice-impaired individuals, for smart shopping using smart trolley, and more. Offering a plethora of examples of how sensor imaging can be applied for real-time solutions, this volume will provide inspiration for industry professionals and faculty and students in electronics and communication engineering interested in finding solutions to today’s problems using sensor technology.

Proceedings Of The 5th China And International Young Scientist Terahertz Conference Volume 2

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Author : Chao Chang
language : en
Publisher: Springer Nature
Release Date : 2024-07-06

Proceedings Of The 5th China And International Young Scientist Terahertz Conference Volume 2 written by Chao Chang and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-07-06 with Science categories.

The Proceedings of the 5th China and International Young Scientist Terahertz Conference highlight the important research and technological progresses on terahertz signal sources, terahertz detection, terahertz biophysics, terahertz transmission, terahertz regulation, terahertz device and materials, terahertz communication, terahertz radar and imaging, terahertz spectroscopy and biotechnology, and the intersection and application of terahertz-related disciplines.

Through The Wall Radar Imaging

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Author : Moeness G. Amin
language : en
Publisher: CRC Press
Release Date : 2017-12-19

Through The Wall Radar Imaging written by Moeness G. Amin and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-19 with Technology & Engineering categories.

Through-the-wall radar imaging (TWRI) allows police, fire and rescue personnel, first responders, and defense forces to detect, identify, classify, and track the whereabouts of humans and moving objects. Electromagnetic waves are considered the most effective at achieving this objective, yet advances in this multi-faceted and multi-disciplinary technology require taking phenomenological issues into consideration and must be based on a solid understanding of the intricacies of EM wave interactions with interior and exterior objects and structures. Providing a broad overview of the myriad factors involved, namely size, weight, mobility, acquisition time, aperture distribution, power, bandwidth, standoff distance, and, most importantly, reliable performance and delivery of accurate information, Through-the-Wall Radar Imaging examines this technology from the algorithmic, modeling, experimentation, and system design perspectives. It begins with coverage of the electromagnetic properties of walls and building materials, and discusses techniques in the design of antenna elements and array configurations, beamforming concepts and issues, and the use of antenna array with collocated and distributed apertures. Detailed chapters discuss several suitable waveforms inverse scattering approaches and revolve around the relevance of physical-based model approaches in TWRI along with theoretical and experimental research in 3D building tomography using microwave remote sensing, high-frequency asymptotic modeling methods, synthetic aperture radar (SAR) techniques, impulse radars, airborne radar imaging of multi-floor buildings strategies for target detection, and detection of concealed targets. The book concludes with a discussion of how the Doppler principle can be used to measure motion at a very fine level of detail. The book provides a deep understanding of the challenges of TWRI, stressing its multidisciplinary and phenomenological nature. The breadth and depth of topics covered presents a highly detailed treatment of this potentially life-saving technology.

Science Abstracts

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Author :
language : en
Publisher:
Release Date : 1995

Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Electrical engineering categories.