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Cruz, C. C., Costa, J. R., Fernandes, C. A. & Matos, S. (2017). Focal-plane multibeam dual-band dielectric lens for ka-band. IEEE Antennas and Wireless Propagation Letters. 16, 432-436
A. C. Cruz et al., "Focal-plane multibeam dual-band dielectric lens for ka-band", in IEEE Antennas and Wireless Propagation Letters, vol. 16, pp. 432-436, 2017
@article{cruz2017_1734879629305, author = "Cruz, C. C. and Costa, J. R. and Fernandes, C. A. and Matos, S.", title = "Focal-plane multibeam dual-band dielectric lens for ka-band", journal = "IEEE Antennas and Wireless Propagation Letters", year = "2017", volume = "16", number = "", doi = "10.1109/LAWP.2016.2582263", pages = "432-436", url = "http://ieeexplore.ieee.org/document/7494623/" }
TY - JOUR TI - Focal-plane multibeam dual-band dielectric lens for ka-band T2 - IEEE Antennas and Wireless Propagation Letters VL - 16 AU - Cruz, C. C. AU - Costa, J. R. AU - Fernandes, C. A. AU - Matos, S. PY - 2017 SP - 432-436 SN - 1536-1225 DO - 10.1109/LAWP.2016.2582263 UR - http://ieeexplore.ieee.org/document/7494623/ AB - A shaped double-shell dielectric lens is evaluated as a primary feed for a multibeam single-reflector system operating in the satellite uplink and downlink Ka-bands, complying with gain and edge-of-coverage (EoC) directivity requirements. An assembly of dual-band printed feeds is integrated at the base of a single lens, each feed producing a virtual focus far behind the lens base and coincident with the reflector focal arch. The used double-shell lens approach, instead of a single-material lens, allows an extra degree of freedom to accommodate an aberration mitigation condition. This primary feed system is proposed as a low-complexity solution to enable fitting more beams per solid angle than conventional single-feed-per-beam systems based on a cluster of focal-plane horns. A proof-of-concept lens prototype with 87mm diameter and 62 mm height, fed by a linear arrangement of five dual-band printed feeds, was fabricated and tested at the Ka-band. The lens measured radiation patterns were post-processed to evaluate the combined performance of the lens with an offset F/D = 1 reflector system designed for 45 dBi EoC directivity. It is shown that it duplicates the reflector aperture efficiency compared to horn-fed systems with same feed separation. ER -