Please use this identifier to cite or link to this item:
http://hdl.handle.net/10071/13060
Author(s): | Cruz, C. C. Costa, J. R. Fernandes, C. A. Matos, S. |
Date: | 2017 |
Title: | Focal-plane multibeam dual-band dielectric lens for ka-band |
Volume: | 16 |
Pages: | 432 - 436 |
ISSN: | 1536-1225 |
DOI (Digital Object Identifier): | 10.1109/LAWP.2016.2582263 |
Keywords: | Dual-band antenna Multibeam antennas Reflector antennas Shaped double shell-lens antenna |
Abstract: | 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. |
Peerreviewed: | yes |
Access type: | Embargoed Access |
Appears in Collections: | CTI-RI - Artigos em revistas científicas internacionais com arbitragem científica |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
AWPL_17a.pdf Restricted Access | Versão Editora | 309,98 kB | Adobe PDF | View/Open Request a copy |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.