Comparative study of different approaches to analyze unit cells of reflectarray antennas

  1. Gómez Álvarez, Andrés 1
  2. Imaz Lueje, Borja 1
  3. Rodríguez Prado, Daniel 1
  4. Arrebola Baena, Manuel 1
  5. Rodríguez Pino, Marcos 1
  1. 1 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

Proceedings:
15th European Conference on Antennas and Propagation (EuCAP)

Publisher: European Association on Antennas and Propagation (EuCAP)

Year of publication: 2021

Congress: European Conference on Antennas and Propagation, EuCAP (15th. Virtual)

Type: Conference paper

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Abstract

We present a comparative study of reflectarrayantenna analysis using two different techniques. Two differentreflectarrays are simulated, with an isoflux pattern and witha squared-cosecant pattern in elevation and sectored-beam inazimuth. Each antenna is analysed using two techniques to obtainthe reflection coefficients matrix. Both techniques are based onthe Floquet theorem assuming local periodicity. First, we use thecommercial software HFSS to analyze reflectarray cells basedon two stacked rectangular patches. The finite element methodof HFSS is employed. The second method is an in-house adhoc method of moments (MoM). In all cases, each reflectarrayelement is analyzed considering the real angle of incidence insteadof the common approach of using normal incidence curves.Results show good agreement between the two approaches forthe computation of the reflection coefficients as well as for theprediction of both the copolar and crosspolar components of theradiation patterns.

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Funding information

This work was supported in part by the Ministerio de Ciencia, Innovación y Universidades under projects TEC2017-86619-R (ARTEINE) and IJC2018-035696-I; by the Ministerio de Economía, Industria y Competitividad under project TEC2016-75103-C2-1-R (MYRADA); by the Gobierno del Principado de Asturias/FEDER under Project GRUPIN-IDI/2018/000191.

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