Download or read book Planar Active Antennas and Quasi optical Power Combining Arrays Using FET s and Slots written by Shigeo Kawasaki and published by . This book was released on 1993 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents design concepts and experimental data of planar active antenna and quasi-optical power combining arrays with strong coupling to realize a compact and low-cost radar and communication system. The prototype circuits for this purpose were made in a layered configuration using microstrip lines and in a uniplanar structure using CPW's. As an active source, an FET was selected. As a unit cell of the power combining array, a single layered active antenna using microstrip lines and slots was fabricated. In the design, small signal S-parameters were used to determine the circuit configuration while a large signal analysis to the entire circuit involving the slot antenna input impedance was carried out. The circuit designed for 10 GHz was found to operate at 9.3 GHz and the other designed for 25 GHz at 24 GHz. In addition, the circuit with CPW's and slot designed for 10 GHz was found to operate at 8.6 GHz. Based on these successful results, linear power combining arrays were made. For the strong coupling, each oscillator output is connected by a single transmission line. Several 6-element microstrip arrays and a 4-element CPW array were fabricated. In the former, sharp main beams were obtained. To obtain a millimeter-wave operating frequency, the second harmonic spatial power combining array made with FET's were demonstrated around 40 GHz. To show a topology of a 2-dimensional array, a 16-element dual polarized array at 7.8 GEL was made. To obtain the maximum in-phase radiation signal, impedance matching, a phase of the radiation signal and a signal phase of each oscillator were taken into account ... Active antenna, Quasi-optical technique, Optical control, Spatial power combiner.
Download or read book Active Antennas and Quasi Optical Arrays written by Amir Mortazwi and published by Wiley-IEEE Press. This book was released on 1999 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrical Engineering Active Antennas and Quasi-Optical Arrays Whether communications, radar, transportation, or defense drives your interest in solid-state devices at microwave and millimeter-wave frequencies, this ready reference book provides you with a useful review of quasi-optical power combining and active integrated antennas. Brought to you in one convenient volume are key reprinted papers from leading experts in microwave technology. Their valuable perspectives range from the most current advances to historical developments. Included as a special feature is an invited paper, never-before-published, which presents an overview of quasi-optical power combining by noted authority J. W. Mink and colleagues. You will discover other helpful highlighted topics such as: Transmitting and receiving active antennas Spatial power combining oscillators Spatial combining amplifiers Beam control Active integrated antennas and quasi-optical systems Analysis and CAD Emerging technologies—two dimensional quasi-optics
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reconfigurable Active and Passive Planar Antennas for Wireless Communication Systems written by Shiban Kishen Koul and published by Springer Nature. This book was released on 2022-10-14 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents state-of-the-art trends in reconfigurable active and passive planar antennas and their applications in wireless communication systems operating in the frequency band 5-6 GHz. Due to various key features such as multifunction antenna design, compactness, planar nature, and low cost, these technologies are becoming popular for current and future wireless applications. This book discusses different novel antenna designs and their working principles in detail. The modern and future wireless systems require wideband antennas to accommodate various channels in a single band or in separate bands. The carrier aggregation (CA) has been introduced in the modern wireless systems such as LTE-advanced systems and 5G./6G. In CA, a device can use several channels for transmission and reception. The used channels can exist in the same frequency band (intra-band CA) or in distinct bands (inter-band CA). To accommodate more channels, more bandwidth is required within the operating band. For portable devices, circularly polarized (CP) antennas are more advantageous over linearly polarized antennas since in CP antennas, there is low risk of misalignment and, hence encountering interference. Circularly polarized antenna also provides higher link reliability for the portable devices. To provide high data rates, more bandwidth is needed to accommodate more channels. Various multifunction, compact, and wideband antennas for plethora of applications are addressed in detail in this book. The scope of developing reconfigurable active antennas for application in beam switching, beam steering, wireless charging, security systems, etc., is described. This book concludes by giving glimpses of antenna requirements for future wireless communication systems.
Download or read book Research in Progress written by and published by . This book was released on 1992 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Directions in Terahertz Technology written by J.M. Chamberlain and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed study of the science, engineering and applications of terahertz technology, based on room-temperature solid-state devices, which are seen as the key technology for wider applications in this frequency range. The relative merits of electronic and optical devices are discussed and new device principles identified. Issues of terahertz circuit design, implementation and measurement are complemented by chapters on current and future applications in communications, sensing and remote surveillance. Audience: The unique coverage of all aspects of terahertz technology will appeal to both new and established workers in the field, as well as providing a survey for the interested reader.
Download or read book Topology of planar active integrated antenna arrays using FET s and slots written by Shigeo Kawasaki and published by . This book was released on 1994 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conference Proceedings written by and published by . This book was released on 1993 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active and Quasi Optical Arrays for Solid State Power Combining written by Robert A. York and published by Wiley-Interscience. This book was released on 1997-04-11 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed and timely overview of recent developments in active quasi-optical arrays In recent years, active quasi-optics has emerged as one of the most dynamic fields of contemporary research—a highly unconventional approach to microwave and millimeter-wave power generation that integrates solid-state devices into a single quasi-optical component in which all devices operate in unison. This book defines and describes active quasi-optical arrays, reviews the current state of the art, and answers numerous basic and technical questions on the design, analysis, and application of these devices. The contributors to this volume are leading researchers in the field who present results and views from government, industrial, and university laboratories and offer a balanced discussion on a high technical level. They also offer insight into the applicability and commercial value of this technology for military systems, manufacturing processes, communications, and consumer products. Topics presented include: Analysis and design methodologies for quasi-optical active arrays Power-added and power-combining efficiencies of quasi-optical amplifier arrays Phase-shifterless beam steering in oscillator and amplifier arrays Integrating quasi-optical active components into a compact subsystem Design and fabrication of quasi-optical oscillators, amplifiers, multipliers, and tuners Characterization and measurement of quasi-optical components
Download or read book Integrated Active Antennas and Spatial Power Combining written by Julio A. Navarro and published by Wiley-Interscience. This book was released on 1996-08-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the only book currently available that covers this subject. The authors piece together information from diverse areas which is essential to understand integrated and integrated active antennas. Emphasis is placed on active antennas and power combining applications, consolidating the work from numerous researchers. Early chapters lay the foundation for oscillator, antenna, array and power combining theory. Chapter five discusses important testing parameters and techniques for active antenna measurements and includes definitions for equivalent isotropic radiated power, locking gain and locking bandwidth. The last chapter sheds light on beam steering, a more recent development in active antenna arrays. Contains over 200 illustrations.
Download or read book Design and Applications of Active Integrated Antennas written by Mohammad S. Sharawi and published by Artech House. This book was released on 2018-05-31 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive new resource guides professionals in the latest methods used when designing active integrated antennas (AIA) for wireless communication devices for various standards. This book provides complete design procedures for the various elements of such active integrated antennas such as the matching network, the amplifier/active element as well as the antenna. This book offers insight into how active integration and co-design between the active components (amplifier, oscillator, mixer, diodes) and the antenna can provide better power transfer, higher gains, increased efficiencies, switched beam patterns and smaller design footprints. It introduces the co-design approach of active integrated antennas and its superior performance over conventional methods. Complete design examples are given of active integrated antenna systems for narrow and wideband applications as well as for multiple-input-multiple-output (MIMO) systems. Readers find the latest design methods for narrow and broadband RF matching networks. This book provides a complete listing of performance metrics for active integrated antennas. The book serves as a complete reference and design guide in the area of AIA.
Download or read book Proceedings written by and published by . This book was released on 1992 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Subharmonic Mixing Antenna for Millimeter wave Receivers and Oscillating Slot Antennas for Quasi optical Power Combining written by Brian Kenneth Kormanyos and published by . This book was released on 1994 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Graduate Quarterly written by and published by . This book was released on 1994 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1995 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FET Active Notch Antennas for Quasi optical Power Combining written by William Kent Leverich and published by . This book was released on 1993 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A subharmonic mixing antenna for millimeter wave receivers and oscillating slot antennas for quasi optical power combining written by Brian Kenneth Komanyos and published by . This book was released on 1994 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
