Title:
Off-Axis Performances of Half Maxwell Fish-Eye Lens Antennas at 77GHz
Author(s):
Benjamin Fuchs, Olivier Lafond, Mohamed Himdi, Sébastien Rondineau, and Laurent Le Coq
Source:
Proc. ‘EuCAP 2006’, Nice, France
Vol./Issue/Date:
Year:
2006
Page(s):
Keywords:
Lens Antennas; Millimeter-wave antenna; multiple-beam antennas; automotive radars
Abstract:
This paper presents the off-axis performances at 77GHz of multi-layered half Maxwell fish-eye (HMFE) lenses fed by an open-ended waveguide. The ability of the HMFE lens to form multiple beams by moving the feed with respect to (w.r.t.) the lens is studied. Several off-axis configurations of the lens antenna are investigated and compared using a full-wave electromagnetic software. The directivity, far field pattern and scan angle of the lens antenna are reported for a rectilinear and angular off-axis displacement of the feed and also for various distances between the feed and the lens. The influence of the number of shells is also studied to reduce the side lobe levels as well as to enhance the lens antenna directivity. Finally, off-axis measurements done with a three-shell 6.15 ¸0 - diameter HMFE lens antenna are compared to computed results to validate the simulations.
Document:
Reference Id:
220
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