Download or read book Adaptive Phase Shifter Nulling Techniques for Large Aperture Phased Arrays written by W. F. Gabriel and published by . This book was released on 1988 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several simple phase-shifter nulling techniques are investigated for application to large-aperture phased arrays to provide a modest, partial adaptive capability at reasonable cost. These techniques do not require auxiliary elements, correlators, or beamformers, but they do require access to the array element phase shifters for injection of small phase perturbations. They also require a priori knowledge of interference source directions to facilitate fast cancellation. Particular aperture ripple modulation algorithms, based on beamspace decomposition principles and adaptive search techniques, are described and applied to computer simulated source situations. For example, by using a 16 element linear array, two strong sources of 5% bandwidth were nulled out within about 600 snapshots (range bins) of data; this is remarkably fast for such a simple phase-only adaptive system. The performance results achieved indicate that the concept is feasible and ready for experimental phased-array verification. (rh).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Official Gazette of the United States Patent and Trademark Office written by and published by . This book was released on 1990 with total page 792 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 1991-04 with total page 1364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Smart Antennas written by Theodore S. Rappaport and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1998 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this compendium, you will find some of the classical publications and most promising research papers which have and will continue to impact the emerging field of wireless adaptive arrays. The papers have been compiled based on graduate student research at the Mobile and Portable Radio Research Group (MPRG) at Virginia Tech. This book is a handy, single-source reference to assist graduate students, researchers, and practitioners involved with the design, development, and deployment of smart antenna technology.
Download or read book Adaptive Antennas and Phased Arrays for Radar and Communications written by Alan J. Fenn and published by Artech House. This book was released on 2007-12-01 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the author's extensive research at MIT Lincoln Laboratory, this authoritative resource offers an in-depth description of adaptive array design, emphasizing the RF characteristics, mutual coupling among elements, and field testing methods. It provides you with proven techniques for challenging projects involving radar, communication systems and antenna design. For the first time in any book, you find design guidance on specialized types of arrays, using monopole radiating elements, slotted cylinders and ultrawideband dipoles. Moreover, this unique book presents a focused near-field technique that quantifies the far-field performance of large aperture radar systems and communication systems. The book presents example prototype phased array antennas, including discussions on monopole phased arrays, finite and infinite array analyses, measurements for planar arrays of monopole elements. Further, you get a detailed explanation of focused near-field polarization characteristics of monopole arrays as related to adaptive array testing in the near field. From the fundamentals of adaptive antennas and degrees of freedom for multiple beam antennas and phased arrays… to a test bed monopole phased array and the planar near field testing technique… to arrays of horizontally polarized loop-fed slotted cylinder antennas and ultrawideband dipole arrays, this comprehensive book offers you invaluable, hands-on knowledge for your work in the field.
Download or read book Federal Register written by and published by . This book was released on 1990-11 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Collection of Technical Papers written by and published by . This book was released on 1992 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalog of Government Inventions Available for Licensing 1991 written by and published by . This book was released on 1992-02 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catalog of Government Inventions Available for Licensing written by and published by . This book was released on 1991 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Symposium Digest Antennas and Propagation written by and published by . This book was released on 1990 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index of Patents Issued from the United States Patent and Trademark Office written by and published by . This book was released on 1990 with total page 1754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Lincoln Laboratory Journal written by and published by . This book was released on 2000 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Science Abstracts written by and published by . This book was released on 1995 with total page 1360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Signal written by and published by . This book was released on 1993 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Engineering Index Annual written by and published by . This book was released on 1992 with total page 2264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.
