Bicollimated near-field Gregorian reflector antenna
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Bicollimated near-field Gregorian reflector antenna

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Published by Naval Research Laboratory in Washington, D.C .
Written in English

Subjects:

  • Antennas, Reflector

Book details:

Edition Notes

StatementJ.B.L. Rao
SeriesNRL report -- 8658
ContributionsNaval Research Laboratory (U.S.)
The Physical Object
Paginationiii, 13 p. :
Number of Pages13
ID Numbers
Open LibraryOL17961799M

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The bicollimated reflector Is obtained by firs, designing a bleollimated cylindrical reflector system using geometrical optics techniques and then revolving the cross section curves to form a surface of revolution, Selected parts of these surfaces will form an offset reflector configuration. Figure I shows the cross section of an offset configuration of a bicollirrated near-field Gregorian reflector antenna. . This is the first truly comprehensive and most up-to-date handbook available on modern reflector antennas and feed sources for diversified space and ground applications. There has never been such an all-encompassing reflector handbook in print, and no currently available title offers coverage of such recent research developments. Cassegrain and Gregorian Reflectors 98 TheEquivalent Paraboloid FeedandSubreflectorBlockage Sidelobes EfficiencyFactors OffsetDual-ReflectorSystems Antenna NoiseTemperature ReflectorShaping OtherClassical Reflectors Corner Reflectors Spherical. The book is aimed for use by practicing antenna engineers and researchers in the industry and academia. This book starts with an introduction to the reflector antennas in Chapter 1, which discusses conventional parabolic symmetric reflector antenna geometry, and ray tracing diagrams for some of the popular reflector antenna configurations.

The designed imaging radar system is made up of a GHz CW-LFM homodyne radar sensor and a novel Bifocal Elliptical Gregorian Reflector System (BEGRS) for standoff detection at . Stutzman's 3rd edition of Antenna Theory and Design provides a more pedagogical approach with a greater emphasis on computational methods. New features include additional modern material to make the text more exciting and relevant to practicing engineers; new chapters on systems, low-profile elements and base station antennas; organizational changes to improve understanding; more details . The most popular dual-reflector antennas are the Cassegrain and Gregorian antennas. Probably one of the most important parameters in a reflector antenna is the ratio of the focal length to antenna aperture size (f / d), where the main aperture of the largest circular reflector is derived. Off Axis or Offset Parabolic Antenna Feed The Gregorian reflector feed technique is incredibly kind of like the Cassegrain style. The foremost distinction is that except that the secondary reflector is dished or additional properly non-circular in form. Typical aperture potency levels of over seventieth are often achieved as a result of the.

A bicollimated Gregorian reflector is structurally similar to a classical confocal Gregorian reflector, but its surfaces are shaped to have better scan capability. A geometrical optics procedure. Additional Physical Format: Online version: Reflector antennas. New York: IEEE Press, © (OCoLC) Document Type: Book: All Authors / Contributors.   Next, authors C. Babu Ravipati and Sudhakar K. Rao, present advanced reflector antennas, which includes discussions on the confocal reflector antenna systems, side fed and front fed offset Cassegrian reflector antennas, non-focused reflector antennas, and reconfigurable s: 1. Another scanable offset antenna arrangement is disclosed in the publication entitled "Limited Electronic Scanning with an Offset-Feed Near-Field Gregorian System" by W. D. Fitzgerald in Technical.