Revisiting beamforming under the prism of inverse methods

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Beamforming, namely exciting properly a set of sources whose collective radiation mimics a given pattern, is an inherently inverse problem. Since the inverse design methods are recently being introduced in photonic systems leading to devices of unprecedented efficiency, we reconsider beamforming in this context. Accordingly, flawless beam-shaping is reported for the simple case of multiple emitters placed along a line. The key parameter to fulfill such an objective is the distance between two consecutive antennas which should obey an approximate inequality, securing both diversity and coherence for the emitting patterns. This condition cannot be attained when infinite directivity is demanded; however, ultra-narrow radiation lobes are developed for the suitable, inversely-determined excitations.

Original languageEnglish
Title of host publicationPhysics and Simulation of Optoelectronic Devices XXVII
EditorsMarek Osinski, Bernd Witzigmann, Yasuhiko Arakawa
PublisherSPIE
ISBN (Electronic)9781510624665
DOIs
Publication statusPublished - Jan 1 2019
EventPhysics and Simulation of Optoelectronic Devices XXVII 2019 - San Francisco, United States
Duration: Feb 5 2019Feb 7 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10912
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferencePhysics and Simulation of Optoelectronic Devices XXVII 2019
CountryUnited States
CitySan Francisco
Period2/5/192/7/19

Keywords

  • Antenna directivity
  • Beamforming
  • Inverse design
  • Laser emitters
  • Phased array.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Valagiannopoulos, C., & Kovanis, V. (2019). Revisiting beamforming under the prism of inverse methods. In M. Osinski, B. Witzigmann, & Y. Arakawa (Eds.), Physics and Simulation of Optoelectronic Devices XXVII [109120Q] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10912). SPIE. https://doi.org/10.1117/12.2509452