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

  1. Rodríguez Prado, Daniel 1
  2. Arrebola Baena, Manuel 1
  3. Rodríguez Pino, Marcos 1
  4. Goussetis, George
  1. 1 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

Proceedings:
14th European Conference on Antennas and Propagation, EuCAP 2020

Year of publication: 2020

Congress: European Conference on Antennas and Propagation (EuCAP) (14th. 2020. Copenhagen, Denmark)

Type: Conference paper

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Abstract

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 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 band.

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Funding information

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; 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).

Funders

  • Ministerio de Ciencia, Innovación y Universidades Spain
    • TEC2017-86619-R
  • Ministerio de Economía, Industria y Competitividad Spain
    • TEC2016-75103-C2-1-R
  • Gobierno del Principado de Asturias Spain
    • GRUPIN-IDI/2018/000191