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A Microstrip Reflect Array Using Crossed DipolesMicrostrip reflect arrays offer a flat profile and light weight, combined with many of the electrical characteristics of reflector antennas. Previous work [1]-[7] has demonstrated a variety of microstrip reflect arrays, using different elements at a range of frequencies. In this paper we describe the use of crossed dipoles as reflecting elements in a microstrip reflectarray. Theory of the solution will be described, with experimental results for a 6" square reflectarray operating at 28 GHz. The performance of crossed dipoles will be directly compared with microstrip patches, in terms of bandwidth and loss. We also comment on the principle of operation of reflectarray elements, including crossed dipoles, patches of variable length, and patch elements with tuning stubs. This research was prompted by the proposed concept of overlaying a flat printed reflectarray on the surface of a spacecraft solar panel. Combining solar panel and antenna apertures in this way would lead to a reduction in weight and simpler deployment, with some loss of flexibility in independently pointing the solar panel and the antenna. Using crossed dipoles as reflectarray elements will minimize the aperture blockage of the solar cells, in contrast to the use of elements such as microstrip patches.
Document ID
20050230095
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
Authors
Pozar, David M.
(Massachusetts Univ. Amherst, MA, United States)
Targonski, Stephen D.
(Massachusetts Univ. Amherst, MA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 1998
Publication Information
Publication: IEEE Antennas and Propagation Society International Symposium 1998 Digest. Antennas: Gateways to the Global Network, Volume 2
Subject Category
Electronics And Electrical Engineering
Distribution Limits
Public
Copyright
Other

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