Near-field multi-focusing transmitarray optimization for multi-position feed

  1. Fernández Vaquero, Álvaro 1
  2. Arrebola Baena, Manuel 1
  3. Rodríguez Pino, Marcos 1
  1. 1 Group of Signal Theory and Communications, Universidad de Oviedo
Actes:
Annual Meeting and Symposium of the Antenna Measurement Techniques Association

Any de publicació: 2019

Congrés: Annual Meeting and Symposium of the Antenna Measurement Techniques Association (41st. 2019. San Diego, USA)

Tipus: Aportació congrés

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Resum

A transmitarray antenna is proposed as a multifocusing antenna in the near-field region with capability for focus scanning and/or simultaneous and independent focus spots generation at 28 GHz. The transmitarray optics is defined for a centred configuration and the elements are designed to focus the radiated near-field at a given point. Then, a number of feeds is placed along arcs in the principal planes and the near-field generated by the transmitarray when its illuminated by each one is obtained, demonstrating the capability to generate multiple independent near-field spots. The focusing performance is improved for the centered feed through a Phase-Only synthesis technique based on the generalized Intersection Approach in near-field. Finally, the spots produced by the whole cluster are calculated, demonstrating the overall improvement and validating the designing process. This configuration can be applied in near-field systems as radar for surface inspection, measurement systems or wireless power transfer among others.

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Informació de finançament

This work was supported in part by the Ministerio de Ciencia, Innovación y Universidades under project TEC2017-86619-R (ARTEINE) and by the Gobierno del Principado de Asturias/FEDER under Project GRUPIN-IDI/2018/000191.

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