TY - GEN
T1 - Frequency performance of 4-layer discretized Luneburg antennas
AU - Gray, D.
AU - Nikolic, N.
AU - Thornton, J.
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/11/7
Y1 - 2016/11/7
N2 - A series of 8λ0 to 14λ0 radius 4-layer stepped approximation Luneburg lenses were designed for the same scalar feed positioned at 1.1 lens radii. The relative permittivities and normalized thicknesses of the matching layers of each lens were close but not equal. The lenses were simulated in commercially available full wave simulators. The aperture efficiencies decreased as the lens radii was increased, showing that minor variations in layer thickness and relative permittivity were unable to compensate for decreased excitation aperture illumination. Achieving high aperture efficiencies requires optimization of both lens and feed, the best here been 80% across 15% bandwidth for the 8λ0 lens. The peak cross-polarized radiation within the main lobe was found to be in the 45° plane and to be an artifact of the scalar feed, and not the lens designs.
AB - A series of 8λ0 to 14λ0 radius 4-layer stepped approximation Luneburg lenses were designed for the same scalar feed positioned at 1.1 lens radii. The relative permittivities and normalized thicknesses of the matching layers of each lens were close but not equal. The lenses were simulated in commercially available full wave simulators. The aperture efficiencies decreased as the lens radii was increased, showing that minor variations in layer thickness and relative permittivity were unable to compensate for decreased excitation aperture illumination. Achieving high aperture efficiencies requires optimization of both lens and feed, the best here been 80% across 15% bandwidth for the 8λ0 lens. The peak cross-polarized radiation within the main lobe was found to be in the 45° plane and to be an artifact of the scalar feed, and not the lens designs.
UR - http://www.scopus.com/inward/record.url?scp=85003823284&partnerID=8YFLogxK
U2 - 10.1109/APWC.2016.7738150
DO - 10.1109/APWC.2016.7738150
M3 - Conference Proceeding
AN - SCOPUS:85003823284
T3 - Proceedings of the 2016 6th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, IEEE APWC 2016
SP - 177
EP - 180
BT - Proceedings of the 2016 6th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, IEEE APWC 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 6th IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, IEEE APWC 2016
Y2 - 19 September 2016 through 23 September 2016
ER -