Journal ArticleDOI
An improved design method of Rotman lens antennas
Takashi Katagi,S. Mano,S. Sato,S. Tahara,E. Tomimatsu +4 more
- Vol. 32, Iss: 5, pp 524-527
TLDR
The design method which minimizes the phase error on the aperture of the linear array antenna has been shown and makes it possible to design small and low-loss Rotman lens antennas.Abstract:
A Rotman lens is used to feed a linear array antenna for wideband use. A relationship between design parameters for realizing a Rotman lens has been derived by introducing a new design variable. The design method which minimizes the phase error on the aperture of the linear array antenna has been shown. For large array length, the above phase error due to this method becomes considerably smaller than that due to a conventional method. This improved method makes it possible to design small and low-loss Rotman lens antennas.read more
Citations
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Journal ArticleDOI
Design trades for Rotman lenses
TL;DR: In this paper, the effects of seven design parameters (focal angle, focal ratio, beam angle ratio, maximum beam angle, beam port curve ellipticity, array element spacing, and focal length/ lambda ) on the shape, and on the geometric phase and amplitude errors of a Rotman lens are described.
Journal ArticleDOI
Compact Two-Layer Rotman Lens-Fed Microstrip Antenna Array at 24 GHz
TL;DR: In this article, a two-layer Rotman lens-fed antenna array is demonstrated at 24 GHz aiming for an automotive sensing radar, where the layout of the lens body is placed on the bottom layer and the antennas are placed on top layer.
Journal ArticleDOI
Beamforming Lens Antenna on a High Resistivity Silicon Wafer for 60 GHz WPAN
TL;DR: Wafer-scale beamforming lenses for future IEEE802.15.3c 60 GHz WPAN applications are presented in this article. But the authors focus on the beamforming lens with antenna arrays.
Journal ArticleDOI
True-Time-Delay Beamforming With a Rotman-Lens for Ultrawideband Antenna Systems
TL;DR: An analytical design model for Rotman-lenses is presented, with an accurate treatment of the return loss of the ports and their phase centers, for true-time-delay phasing of an antenna array for the ultrawideband frequency range from 3.1 GHz - 10.6 GHz.
Journal ArticleDOI
Ultra-Wideband Scanning Antenna Array With Rotman Lens
TL;DR: In this article, an ultra-wideband (6-18 GHz) phased-array antenna with a beam scanning angle of ±28° is proposed, and a step-by-step design procedure consisting of beamforming network (BFN), end-launcher feed adapter, and the radiating element is presented.
References
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Journal ArticleDOI
Wide-angle microwave lens for line source applications
W. Rotman,R. Turner +1 more
TL;DR: In this paper, a two-dimensional microwave lens with a straight front face was used to generate fractional degree beams, which can operate at very short pulse lengths and can scan more beamwidths than any previously known device of its type.