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Squint-less arc array for near-field focusing in wideband systems

Author

Listed:
  • Sol Kim
  • Jeong-Wook Kim
  • Hyunyoung Cho
  • ByungKuon Ahn
  • Kwang-Seok Kim
  • Jong-Won Yu

Abstract

In this paper, the arc array for squint-less near-field focusing is used, theoretically analyzed, and verified. The arc array is designed to overcome the squint phenomenon in the near-field and transfers the maximum power at a focused distance. The implemented transmitter is composed of $ 16\times 1 $ 16×1 vivaldi antennas with a $ 0.7\lambda $ 0.7λ spacing and operates at a frequency of 5.8 GHz. In addition, the design method of the arc array is proposed, considering the focused distances. In the experiments, the bending degree of the arc array is $ 4.14^{\circ } $ 4.14∘ when the focused distance is 0.5 m. At a fractional bandwidth of 27.5%, the focus position is shifted 32%. On the other hand, in the arc array, the focus position is not shifted. Experimental results from the implemented arc array show good agreement with the proposed theory.

Suggested Citation

  • Sol Kim & Jeong-Wook Kim & Hyunyoung Cho & ByungKuon Ahn & Kwang-Seok Kim & Jong-Won Yu, 2021. "Squint-less arc array for near-field focusing in wideband systems," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 35(10), pages 1378-1387, July.
    • Handle: RePEc:taf:tewaxx:v:35:y:2021:i:10:p:1378-1387
    DOI: 10.1080/09205071.2021.1890642
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