Download or read book Microstrip Reflectarray Antenna for the Scanscat Radar Application written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-10-28 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication presents an antenna system that has been proposed as one of the candidates for the SCANSCAT (Scanned Scatterometer) radar application. It is the mechanically steered planar microstrip reflectarray. Due to its thin, lightweight structure, the antenna's mechanical rotation will impose minimum angular momentum for the spacecraft. Since no power-dividing circuitry is needed for its many radiating microstrip patches, this electrically large array antenna demonstrates excellent power efficiency. In addition, this fairly new antenna concept can provide many significant advantages over a conventional parabolic reflector. The basic formulation for the radiation fields of the microstrip reflectarray is presented. This formulation is based on the array theory augmented by the Uniform Geometrical Theory of Diffraction (UTD). A computer code for analyzing the microstrip reflectarray's performances, such as far-field patterns, efficiency, etc., is also listed in this report. It is proposed here that a breadboard unit of this microstrip reflectarray should be constructed and tested in the future to validate the calculated performance. The antenna concept presented here can also be applied in many other types of radars where a large array antenna is needed. Huang, John Jet Propulsion Laboratory NAS7-918...
Download or read book Reflectarray Antennas written by John Huang and published by John Wiley & Sons. This book was released on 2007-11-09 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the configuration and principles of a reflectarray antenna, its advantages over other antennas, the history of its development, analysis techniques, practical design procedures, bandwidth issues and wideband techniques, as well as applications and recent developments. Both authors are well respected practitioners who have build these antennas and developed them for space flight.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reflectarray Antennas written by Payam Nayeri and published by John Wiley & Sons. This book was released on 2018-02-23 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides engineers with a comprehensive review of the state-of-the-art in reflectarray antenna research and development. The authors describe, in detail, design procedures for a wide range of applications, including broadband, multi-band, multi-beam, contour-beam, beam-scanning, and conformal reflectarray antennas. They provide sufficient coverage of basic reflectarray theory to fully understand reflectarray antenna design and analysis such that the readers can pursue reflectarray research on their own. Throughout the book numerous illustrative design examples including numerical and experimental results are provided. Featuring in-depth theoretical analysis along with practical design examples, em style="mso-bidi-font-style: normal;"Reflectarray Antennas is an excellent text/reference for engineering graduate students, researchers, and engineers in the field of antennas. It belongs on the bookshelves of university libraries, research institutes, and industrial labs and research facilities.
Download or read book The Telecommunications and Data Acquisition Progress Report written by and published by . This book was released on 1994-10 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Digest written by IEEE Antennas and Propagation Society. International Symposium and published by . This book was released on 1991 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Antennas and Propagation Society Symposium written by IEEE Antennas and Propagation Society and published by . This book was released on 1991 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstrip Reflectarray Antenna Program written by Frank Opp and published by . This book was released on 1977 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of a study to determine the feasibility and design limitations of a microstrip reflectarray antenna are presented. This antenna, which has been proposed as a means to provide potential low-cost corporate-fed phased arrays, utilizes microwave integrated circuit techniques to integrate the radiating element, phase-shifter components, dc distribution, and logic circuitry into a single structure. The report contains design and performance data on such an element operating at 3 GHz. The performance was measured using a waveguide test fixture to simulate the array. Fundamental element performance is in agreement with the results of supporting analysis. The usefulness of the element in an array is severely restricted by very narrow bandwidths and relatively high losses. However, supporting theoretical analysis showed the element's loss and operating bandwidth are a strong function of the element spacing in an array environment. Results indicate reduced loss and increased bandwidth with decreased spacing, thereby suggesting that the present performance deficiencies could be overcome. (Author).
Download or read book Advances in Microstrip Reflectarray Antenna Designs and Diagnostics written by Harish Rajagopalan and published by . This book was released on 2011 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1720 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 1992-12 with total page 2022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Performance of a Microstrip Reflectarray Antenna written by Ronald David Javor and published by . This book was released on 1994 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the Jet Propulsion Laboratory 1990 and 1991 written by and published by . This book was released on 1993 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstrip Phased Array Antenna for Radar Application written by Saiful Nubli Abdul Ghani and published by . This book was released on 2007 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstrip Reflectarray Antennas written by Ang Yu and published by . This book was released on 2010 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reflectarray antenna takes advantages of both the reflector antenna and the array antenna, by spatially illuminating an array of phased antenna elements distributed on a planar surface. In this dissertation, a general reflectarray system model is characterized by a group of configuration parameters, whose relationship with the aperture efficiency is established. This leads to rules of thumb for reflectarray antenna designs. Reflectarray antenna elements are analyzed by the infinite array theory, whereas a model based on the Equivalence Principle is applied to calculate the far-field pattern of a reflectarray system. A general procedure is proposed for reflectarray antenna designs. The phase control over individual elements is realized by the element rotation technique and the variable element size technique. The examples of an X-band, a Ka-band, a C-band, and a single-layer tri-band circularly polarized reflectarray prototype have been designed, fabricated, and measured. The X-band prototype has a gain of 30.4 dB and an aperture efficiency of 53%. The axial ratio bandwidth (AR
Download or read book JPL Bibliography written by and published by . This book was released on 1988 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
