V-Band Fully Metallic Geodesic Luneburg Lens Antenna
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IEEE
Materia
Fully metallic antenna Geodesic lens Luneburg lens antenna Multiple beam antenna V-band
Fecha
2023-02-03Referencia bibliográfica
Zetterstrom, O. et al. V-Band Fully Metallic Geodesic Luneburg Lens Antenna. IEEE Transactions on antennas and propagation, vol. 71, Nº. 2, February 2023. [https://doi.org/10.1109/TAP.2022.3228690]
Patrocinador
Strategic Innovation Program Smarter Electronics System under Project High-Int 2019-02103; European Space Agency European Commission 4000125905/18/NL; VR Project 2019-03933Resumen
Antennas in emerging millimeter-wave (mm-wave) appli-
cations are often required to have low losses and produce a steerable
directive beam. These properties are achievable with fully metallic
geodesic Luneburg lens antennas. In this communication, we report the
first experimental verification of a geodesic Luneburg lens antenna in the
V-band. The designed lens antenna is fed with 13 waveguides providing
beam switching capability in a 110◦ range. The lens is implemented
in the parallel plate waveguide (PPW) technology. The antenna is
manufactured in two pieces, and a tolerance analysis indicates that
gaps between the pieces can cause a severe performance degradation.
Based on this tolerance analysis, two measures are taken to alleviate
the manufacturing tolerances for the prototype. First, electromagnetic
band gap (EGB) structures are placed around the feeding waveguides.
Second, the electrical contact between the two pieces is improved in
critical regions. Two prototypes are manufactured, one without and one
with the extra measures implemented. The measured radiation patterns
of the prototype without these measures have high side lobes and low
realized gain compared with the simulation. The measurements of the
robust version of the prototype agree well with the simulations and
demonstrate the applicability of geodesic Luneburg lens antennas for
applications in the V-band.