Download or read book Polarization Reconfigurable Patch Antenna Using Microelectromechanical Systems MEMS Actuators written by and published by . This book was released on 2002 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Novel On Wafer Radiation Pattern Measurement Technique for Mems Actuator Based Reconfigurable Patch Antennas written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-20 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper presents a novel on-wafer, antenna far field pattern measurement technique for microelectromechanical systems (MEMS) based reconfigurable patch antennas. The measurement technique significantly reduces the time and the cost associated with the characterization of printed antennas, fabricated on a semiconductor wafer or dielectric substrate. To measure the radiation patterns, the RF probe station is modified to accommodate an open-ended rectangular waveguide as the rotating linearly polarized sampling antenna. The open-ended waveguide is attached through a coaxial rotary joint to a Plexiglas(Trademark) arm and is driven along an arc by a stepper motor. Thus, the spinning open-ended waveguide can sample the relative field intensity of the patch as a function of the angle from bore sight. The experimental results include the measured linearly polarized and circularly polarized radiation patterns for MEMS-based frequency reconfigurable rectangular and polarization reconfigurable nearly square patch antennas, respectively. Simons, Rainee N. Glenn Research Center NASA/TM-2002-211816, NAS 1:15:211816, E-13508
Download or read book Reconfigurable Array Antenna Using Microelectromechanical Systems MEMS Actuators written by and published by . This book was released on 2001 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Novel On Wafer Radiation Pattern Measurement Technique for MEMS Actuator Based Reconfigurable Patch Antennas written by and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reconfigurable Antennas written by Jennifer T. Bernhard and published by Springer Nature. This book was released on 2022-05-31 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: This lecture explores the emerging area of reconfigurable antennas from basic concepts that provide insight into fundamental design approaches to advanced techniques and examples that offer important new capabilities for next-generation applications. Antennas are necessary and critical components of communication and radar systems, but sometimes their inability to adjust to new operating scenarios can limit system performance. Making antennas reconfigurable so that their behavior can adapt with changing system requirements or environmental conditions can ameliorate or eliminate these restrictions and provide additional levels of functionality for any system. For example, reconfigurable antennas on portable wireless devices can help to improve a noisy connection or redirect transmitted power to conserve battery life. In large phased arrays, reconfigurable antennas could be used to provide additional capabilities that may result in wider instantaneous frequency bandwidths, more extensive scan volumes, and radiation patterns with more desirable side lobe distributions. Written for individuals with a range of experience, from those with only limited prior knowledge of antennas to those working in the field today, this lecture provides both theoretical foundations and practical considerations for those who want to learn more about this exciting subject. Contents: Introduction / Definitions of Critical Parameters for Antenna Operation / Linkage Between Frequency Response and Radiation Characteristics: Implications for Reconfigurable Antennas / Methods for Achieving Frequency Response Reconfigurability / Methods for Achieving Polarization Reconfigurability / Methods for Achieving Radiation Pattern Reconfigurability / Methods for Achieving Compound Reconfigurable Antennas / Practical Issues for Implementing Reconfigurable Antennas / Conclusions and Directions for Future work
Download or read book Microstrip and Printed Antennas written by Debatosh Guha and published by John Wiley & Sons. This book was released on 2011-02-02 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on new techniques, analysis, applications and future trends of microstrip and printed antenna technologies, with particular emphasis to recent advances from the last decade Attention is given to fundamental concepts and techniques, their practical applications and the future scope of developments. Several topics, essayed as individual chapters include reconfigurable antenna, ultra-wideband (UWB) antenna, reflectarrays, antennas for RFID systems and also those for body area networks. Also included are antennas using metamaterials and defected ground structures (DGSs). Essential aspects including advanced design, analysis and optimization techniques based on the recent developments have also been addressed. Key Features: Addresses emerging hot topics of research and applications in microstrip and printed antennas Considers the fundamental concepts, techniques, applications and future scope of such technologies Discusses modern applications such as wireless base station to mobile handset, satellite earth station to airborne communication systems, radio frequency identification (RFID) to body area networks, etc. Contributions from highly regarded experts and pioneers from the US, Europe and Asia This book provides a reference for R&D researchers, professors, practicing engineers, and scientists working in these fields. Graduate students studying/working on related subjects will find this book as a comprehensive literature for understanding the present and future trends in microstrip and printed antennas.
Download or read book Reconfigurable array antenna using Microelectromechanical Systems MEMS actuators written by Rainee Simons and published by . This book was released on 2001 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Mems for Wireless and Mobile Applications written by Deepak Uttamchandani and published by Elsevier. This book was released on 2013-08-31 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing demand for mobile and wireless sensing necessitates the use of highly integrated technology featuring small size, low weight, high performance and low cost: micro-electro-mechanical systems (MEMS) can meet this need. The Handbook of MEMS for wireless and mobile applications provides a comprehensive overview of radio frequency (RF) MEMS technologies and explores the use of these technologies over a wide range of application areas.Part one provides an introduction to the use of RF MEMS as an enabling technology for wireless applications. Chapters review RF MEMS technology and applications as a whole before moving on to describe specific technologies for wireless applications including passive components, phase shifters and antennas. Packaging and reliability of RF MEMS is also discussed. Chapters in part two focus on wireless techniques and applications of wireless MEMS including biomedical applications, such as implantable MEMS, intraocular pressure sensors and wireless drug delivery. Further chapters highlight the use of RF MEMS for automotive radar, the monitoring of telecommunications reliability using wireless MEMS and the use of optical MEMS displays in portable electronics.With its distinguished editor and international team of expert authors, the Handbook of MEMS for wireless and mobile applications is a technical resource for MEMS manufacturers, the electronics industry, and scientists, engineers and academics working on MEMS and wireless systems. Reviews the use of radio frequency (RF) MEMS as an enabling technology for wireless applications Discusses wireless techniques and applications of wireless MEMS, including biomedical applications Describes monitoring structures and the environment with wireless MEMS
Download or read book Reconfigurable Array Antenna Using Microelectromechanical Systems MEMS Actuators Final Report NASA CR 2001 210889 August 16 2001 written by and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Antennas for Ubiquitous Radio Services in a Wireless Information Society written by Ioan Ernest Lager and published by IOS Press. This book was released on 2010 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless applications are now an integral part of everyday life. On the one hand, these applications are being praised for making lives better by facilitating efficient communication and effectively treating disease. On the other hand, they are criticised for invading privacy and representing a potential health hazard. In any case, we are aware of them everywhere in sound, image and data carrying systems, but they are also intrinsic to weather and traffic monitoring systems and in defence and security technology. In recognition of the need for continuous and sustained effort in the field of antenna engineering, the WiSE project (Wide Band Sparse Element Array Antennas) was initiated in 2004 to assemble a catalogue of wide-band radiators and explore the functional possibilities of a shared aperture concept. This book is a collection of papers which offers a retrospective of the WiSE project s main achievements, whilst also assessing their relevance within a wider antenna engineering perspective. There is a constant demand from wireless systems to provide increased performance; higher channel transmission capacity for multimedia and the pattern shaping and beam agility required for high-end radar and space-borne telecommunications. Addressing innovative concepts and state-of-the-art aspects in array antenna design, manufacturing and measurement, this volume provides an overview of the increasingly complex functionalities demanded by evolving radio services. IOS Press is an international science, technical and medical publisher of high-quality books for academics, scientists, and professionals in all fields. Some of the areas we publish in: -Biomedicine -Oncology -Artificial intelligence -Databases and information systems -Maritime engineering -Nanotechnology -Geoengineering -All aspects of physics -E-governance -E-commerce -The knowledge economy -Urban studies -Arms control -Understanding and responding to terrorism -Medical informatics -Computer Sciences
Download or read book Tunable Patch Antennas Using Microelectromechanical Systems written by Steven Christopher Yee and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Patch antennas are enablers in wireless applications due to their manufacturability, conformability, low cost, and low weight. However, they have narrow bandwidths and fixed operating frequencies that limit their utility when frequency agility is critical. The solution is a tunable patch antenna that retains the desirable features of its fixed frequency counterparts. Patch antennas can be tuned without changes in geometry through loading with variable capacitors or inductors. These components must be small, compatible with antenna and integrated electronics processing, and electrically controlled. Microelectromechanical systems (MEMS) variable components have these characteristics and have been applied in reconfigurable patch antennas. Loading with MEMS capacitors is a more mature technology while the use of MEMS inductors is in its infancy. Antennas tuned with both MEMS variable inductors and capacitors in combination have not been reported. This research presents tunable patch antennas using MEMS variable inductors and capacitors co-fabricated in the same process.
Download or read book Digest written by IEEE Antennas and Propagation Society. International Symposium and published by . This book was released on 2002 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Tech Briefs written by and published by . This book was released on 2004 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reconfigurable Antennas written by Jennifer T. Bernhard and published by Morgan & Claypool Publishers. This book was released on 2007-12-01 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: This lecture explores the emerging area of reconfigurable antennas from basic concepts that provide insight into fundamental design approaches to advanced techniques and examples that offer important new capabilities for next-generation applications. Antennas are necessary and critical components of communication and radar systems, but sometimes their inability to adjust to new operating scenarios can limit system performance. Making antennas reconfigurable so that their behavior can adapt with changing system requirements or environmental conditions can ameliorate or eliminate these restrictions and provide additional levels of functionality for any system. For example, reconfigurable antennas on portable wireless devices can help to improve a noisy connection or redirect transmitted power to conserve battery life. In large phased arrays, reconfigurable antennas could be used to provide additional capabilities that may result in wider instantaneous frequency bandwidths, more extensive scan volumes, and radiation patterns with more desirable side lobe distributions. Written for individuals with a range of experience, from those with only limited prior knowledge of antennas to those working in the field today, this lecture provides both theoretical foundations and practical considerations for those who want to learn more about this exciting subject. Contents: Introduction / Definitions of Critical Parameters for Antenna Operation / Linkage Between Frequency Response and Radiation Characteristics: Implications for Reconfigurable Antennas / Methods for Achieving Frequency Response Reconfigurability / Methods for Achieving Polarization Reconfigurability / Methods for Achieving Radiation Pattern Reconfigurability / Methods for Achieving Compound Reconfigurable Antennas / Practical Issues for Implementing Reconfigurable Antennas / Conclusions and Directions for Future work
Download or read book Research Technology 2001 written by and published by DIANE Publishing. This book was released on with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reconfigurable Compact Cross Patch Antenna for Switchable Polarization written by Nishamol Saidmuhammed and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antennas are necessary and vital components of communication and radar systems, but sometimes their mobility to adjust to new operating scenarios can limit system performance. Reconfigurable antennas can adjust with changing system requirements or environmental conditions and provide additional levels of functionality that may result in wider instantaneous frequency bandwidths, more extensive scan volumes and radiation patterns with more desirable side lobe distributions. Their agility and diversity created new horizons for different types of applications especially in cognitive radio, Multiple Input Multiple Output Systems, satellites and many other applications. Reconfigurable antennas satisfy the requirements for increased functionality, such as direction finding, beam steering, radar, control and command, within a confined volume.
Download or read book Proceedings of the International Conference on Recent Cognizance in Wireless Communication Image Processing written by Nitin Afzalpulkar and published by Springer. This book was released on 2016-04-28 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprises the proceedings of the International Conference on Recent Cognizance in Wireless Communication & Image Processing. It brings together content from academicians, researchers, and industry experts in areas of Wireless Communication and Image Processing. The volume provides a snapshot of current progress in computational creativity and a glimpse of future possibilities. The proceedings include two kinds of paper submissions: (i) regular papers addressing foundation issues, describing original research on creative systems development and modeling; and (ii) position papers describing work-in-progress or research directions for computational creativity. This work will be useful to professionals and researchers working in the core areas of wireless communications and image processing.
