Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 556
Book Description
Scientific and Technical Aerospace Reports
Author: Development of Theoretical Models of Integrated Millimeter Wave Antennas
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781722354756
Category :
Languages : en
Pages : 94
Book Description
Extensive radiation patterns for Linear Tapered Slot Antenna (LTSA) Single Elements are presented. The directivity of LTSA elements is predicted correctly by taking the cross polarized pattern into account. A moment method program predicts radiation patterns for air LTSAs with excellent agreement with experimental data. A moment method program was also developed for the task LTSA Array Modeling. Computations performed with this program are in excellent agreement with published results for dipole and monopole arrays, and with waveguide simulator experiments, for more complicated structures. Empirical modeling of LTSA arrays demonstrated that the maximum theoretical element gain can be obtained. Formulations were also developed for calculating the aperture efficiency of LTSA arrays used in reflector systems. It was shown that LTSA arrays used in multibeam systems have a considerable advantage in terms of higher packing density, compared with waveguide feeds. Conversion loss of 10 dB was demonstrated at 35 GHz. Yngvesson, K. Sigfrid and Schaubert, Daniel H. Unspecified Center...
Aperture Antennas for Millimeter and Sub-Millimeter Wave Applications
Author: Artem BoriskinPublisher: Springer
ISBN: 3319627732
Category : Technology & Engineering
Languages : en
Pages : 494
Book Description
This book presents the technology of millimetre waves and Terahertz (THz) antennas. It highlights the importance of moderate and high-gain aperture antennas as key devices for establishing point-to-point and point-to-multipoint radio links for far-field and near-field applications, such as high data-rate communications, intelligent transport, security imaging, exploration and surveillance systems. The book provides a comprehensive overview of the key antenna technologies developed for the mm wave and THz domains, including established ones – such as integrated lens antennas, advanced 2D and 3D horn antennas, transmit and reflect arrays, and Fabry-Perot antennas – as well as emerging metasurface antennas for near-field and far-field applications. It describes the pros and cons of each antenna technology in comparison with other available solutions, a discussion supplemented by practical examples illustrating the step-by-step implementation procedures for each antenna type. The measurement techniques available at these frequency ranges are also presented to close the loop of the antenna development cycle. In closing, the book outlines future trends in various antenna technologies, paving the way for further developments. Presenting content originating from the five-year ESF research networking program ‘Newfocus’ and co-authored by the most active and highly cited research groups in the domain of mm- and sub-mm-wave antenna technologies, the book offers a valuable guide for researchers and engineers in both industry and academia.
NASA's University Program Active Projects
Author: Publisher:
ISBN:
Category : Federal aid to research
Languages : en
Pages : 398
Book Description
NASA's University Program
Author: United States. National Aeronautics and Space Administration. Office of University AffairsPublisher:
ISBN:
Category :
Languages : en
Pages : 396
Book Description
Government reports annual index
Author: Monthly Catalog of United States Government Publications
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1156
Book Description
U.S. Government Research & Development Reports
Author: Technology for Large Space Systems
Author: Publisher:
ISBN:
Category : Large space structures (Astronautics)
Languages : en
Pages : 684
Book Description
Technical Abstract Bulletin
Author: Defense Documentation Center (U.S.)Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 1116
Book Description