Engineering Reports (Jan 2021)

High resolution beam switch antenna based on modified CRLH Butler matrix

  • Reza Karimian,
  • Mansoor Dashti Ardakani,
  • Shahrokh Ahmadi,
  • Mona Zaghloul

DOI
https://doi.org/10.1002/eng2.12287
Journal volume & issue
Vol. 3, no. 1
pp. n/a – n/a

Abstract

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Abstract A new beam switch antenna based on a composite right/left‐handed (CRLH) Butler matrix is presented and experimentally validated. The CRLH transmission line (TL) is proposed to increase the number of beams. The proposed CRLH TL has more than 100° phase difference using variable bias voltages. Different combinations of phase shifts are achieved by applying different bias voltages between 0 and 8 V. The CRLH TL is added to the conventional Butler matrix to increase the progressive phase difference between adjacent ports, and consequently, the beam pattern. A 5° beam resolution within a spatial range of 100° is achieved. The measurement results are in good agreement with the simulations.

Keywords