Improved bandwidth and gain selectivity in reflectarray antennas by using SIW elements

  1. Eduardo Carrasco 4
  2. Jiawei Zang 1
  3. Alejandro Álvarez-Melcón 3
  4. Juan Sebastián Gómez-Díaz 2
  1. 1 Beijing Institute of Technology
    info

    Beijing Institute of Technology

    Pekín, China

    ROR https://ror.org/01skt4w74

  2. 2 University of California System
    info

    University of California System

    Oakland, Estados Unidos

    ROR https://ror.org/00pjdza24

  3. 3 Universidad Politécnica de Cartagena
    info

    Universidad Politécnica de Cartagena

    Cartagena, España

    ROR https://ror.org/02k5kx966

  4. 4 Universidad Politécnica de Madrid
    info

    Universidad Politécnica de Madrid

    Madrid, España

    ROR https://ror.org/03n6nwv02

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Konferenzberichte:
13th European Conference on Antennas and Propagation

Datum der Publikation: 2019

Art: Konferenz-Beitrag

GOOGLE SCHOLAR

Zusammenfassung

This contribution proposes to improve the response of reflectarray antennas based in aperture-coupled substrate integrated waveguides (SIW) by properly implementing additional slots to the original configuration. By optimizing the number, length and position of rectangular slots, an important improvement in the bandwidth of the reflectarray element can be achieved, while a truetime delay (TTD) is also kept by adjusting the length of the SIW. This strategy also allows to have a sharp response of the gain in terms of the frequency. The replacement of microstrip lines by a SIW allows low losses when the frequency increases, low profile and confinement of back radiation. With this kind of cells, the bandwidth for a 3-dB gain variation can be larger than 20% with gain selectivity of at least 18 dB. This features can be interesting in a wide variation of applications, where a frequency-selective channel is required to avoid interference.