Improvement of the Bandwith in Spaceborne Reflectarrays Based on a Optimization Procedure

  1. Rodríguez Prado, Daniel 1
  2. Arrebola Baena, Manuel 1
  3. Rodríguez Pino, Marcos 1
  4. Goussetis, George
  1. 1 Group of Signal Theory and Communications, University of Oviedo
Actes:
XXXV Simposium Nacional de la Unión Científica Internacional de Radio (URSI)

Any de publicació: 2020

Congrés: Simposium Nacional de la Unión Científica Internacional de Radio (URSI) (35º. 2020. Málaga)

Tipus: Aportació congrés

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Resum

Direct-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 isolation (XPI) in a given bandwidth. This paper describes a wideband optimization procedure and performance results of a very large spaceborne reflectarray for DTH application in a 10% bandwidth. The procedure is divided into three stages to facilitate convergence towards a wideband performance. First, a initial narrowband design 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 to obtain a wideband reflectarray with improved cross-polarization performance. An 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 band.

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Informació de finançament

This 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; and by Ministerio de Educación, Cultura y Deporte/Programa de Movilidad “Salvador de Madariaga” (Ref. PRX18/00424).

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