Open AccessProceedings Article
Circular Array Retrodirective Action Using a Rotman Lens Beamformer
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In this paper, the first use of a circular array for retrodirection covering full 360° is presented, where the attributes of the circular array when combined with Rotman beam forming are discussed.Abstract:
We present the first use of a circular array for retrodirection covering full 360°. In particular, we discuss the attributes of the circular array when combined with Rotman beam forming. For reference the characteristics of the circular array when performing retrodirective action using local per element conjugation is also demonstrated. Simulated and measurement results at X-band are presented. The retrodirective circular array provides the advantage of 360° coverage when compared to other retrodirectors based on uniform linear arrays, as these typically allow only up to ±40° sector coverage.read more
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Journal ArticleDOI
Active Circular Retro-Directive Array
TL;DR: This paper explores the use of an active circular retro-directive array for up to 360° retro-Directive monostatic coverage and shows by selectively choosing which bank of array elements are to be conjugated how to control sectoral retro- directive coverage.
Proceedings ArticleDOI
Millimeter-wave Multimode Circular Array for Spatially Encoded Beamforming in a Wide Coverage Area
TL;DR: In this paper, the authors proposed a multimode circular antenna array based beamforming capable of specially encoded data transmission in a wide coverage area, which is capable of an entire 360° azimuth sector coverage where broadcast, uni-cast and multi-cast radio transmissions are possible.
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Millimeter-wave Multimode Circular Array for Spatially Encoded Beamforming in a Wide Coverage Area
TL;DR: In this paper, the authors proposed a multimode circular antenna array based beamformer capable of specially encoded data transmission in a wide coverage area, where broadcast, uni-cast and multi-cast radio transmissions are possible.
References
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Journal ArticleDOI
A matrix-fed circular array for continuous scanning
TL;DR: In this paper, a Butler-matrix-fed circular array is used to form a focussed radiation pattern when the proper current distribution is established on the inputs to the matrix.
Journal ArticleDOI
Rotman Lens-Based Retrodirective Array
Steven Christie,Robert Cahill,Neil Buchanan,Vincent Fusco,Neil Mitchell,Y. Munro,G. Maxwell-Cox +6 more
TL;DR: Significantly enhanced RCS within the scan coverage ±40° is demonstrated by comparing the retrodirective behavior of a 12-element Vivaldi array terminated with and without the Rotman lens.
Proceedings ArticleDOI
Multiple target tracking using retrodirective antenna arrays
S.L. Karode,Vincent Fusco +1 more
TL;DR: It is shown that the retrodirective array can simultaneously respond to each individual signal proving its usefulness in mobile wireless applications where multiple signal tracking is required.
Journal ArticleDOI
Radiation from Circular Current Sheets
W.R. Lepage,C.S. Roys,S. Seely +2 more
TL;DR: In this article, an analysis of the radiation from a system of coplanar concentric circular current sheets, in which the current elements are perpendicular to the plane of the circles, is carried out.
Proceedings ArticleDOI
Rotman lens design issues
E.O. Rausch,Andrew F. Peterson +1 more
TL;DR: Peterson et al. as mentioned in this paper developed numerical models to predict the N-port scattering matrix of Rotman lenses for microstrip, stripline, and waveguide realizations using both horizontally and vertically oriented rectangular waveguide feeds.