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Band Enhancement in Reflectarrays for Space Communications Based on Multi-Frequency Synthesis Procedure

dc.contributor.authorRodríguez Prado, Daniel 
dc.contributor.authorArrebola Baena, Manuel 
dc.contributor.authorRodríguez Pino, Marcos 
dc.contributor.authorGoussetis, George
dc.descriptionEuropean Conference on Antennas and Propagation (EuCAP) (14th. 2020. Copenhagen)
dc.description.abstractDirect-to-home (DTH) applications usually require a radiation pattern with a given footprint on the surface of the Earth. They also impose stringent cross-polarization requirements in the form of crosspolar discrimination (XPD) or crosspolar isolation in a given bandwidth. This paper describes a multi-frequency wideband optimization procedure and performance results of a very large spaceborne reflectarray for DTH application in a 10% bandwidth. The proposed design methodology is based on the generalized intersection approach and the use of a multi-resonant unit cell with multiple degrees of freedom (DoF). The procedure is divided into three stages to facilitate convergence towards a wideband performance. First, a initial narrowband design at central frequency is obtained. Then, a broadband optimization including XPD requirements is carried out with a limited number of DoF. Finally, more DoF are included in the last stage optimization to obtain a wideband reflectarray with improved cross-polarization performance. A minimum improvement of 4.8 dB is achieved in the cross-polarization performance for both XPD and XPI in a 10% bandwidth, while ensuring that the copolar pattern complies with the specifications in the whole
dc.description.sponsorshipThis work was supported in part by the Ministerio de Ciencia, Innovación y Universidades under the project TEC2017-86619-R (ARTEINE); by the Ministerio de Economía, Industria y Competitividad under the project TEC2016-75103-C2-1-R (MYRADA); by the Gobierno del Principado de Asturias/FEDER under the project GRUPIN-IDI/2018/000191; by the Gobierno del Principado de Asturias through the Programa “Clarín” de Ayudas Postdoctorales/Marie Curie COFUND under the project ACA17-09; and by Ministerio de Educación, Cultura y Deporte/Programa de Movilidad “Salvador de Madariaga” (Ref. PRX18/00424).spa
dc.format.extentp. 1-5spa
dc.relation.ispartof14th European Conference on Antennas and Propagation (EuCAP)spa
dc.rights© 2020 Rodríguez Prado et al.
dc.rightsCC Reconocimiento 4.0 Internacional
dc.subjectspace communicationspa
dc.subjectgeneralized intersection approachspa
dc.titleBand Enhancement in Reflectarrays for Space Communications Based on Multi-Frequency Synthesis Procedurespa

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© 2020 Rodríguez Prado et al.
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