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An All-Metal, Simple-Structured Reflectarray Antenna with 2-D Beam-Steerable Capability
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  • Shaofeng Bi ,
  • Liang Xu ,
  • Xiaoyu Cheng ,
  • Yunfei Sun ,
  • Qiang Zhang ,
  • Chengwei Yuan
Shaofeng Bi
National University of Defense Technology, National University of Defense Technology

Corresponding Author:[email protected]

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Xiaoyu Cheng
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Yunfei Sun
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Qiang Zhang
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Chengwei Yuan
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Abstract

An all-metal reflectarray (RA) element based on the variable-rotation technique (VRT) is presented in this letter. The RA element, based on an elliptical inner conductor and a circular outer conductor, exhibits a continuous 360° phase coverage with negligible element loss over a wide range of incident angles and frequencies. A 10GHz prototype with 121 manually rotated elements was simulated, fabricated and tested. The proposed RA antenna has 2-D beam-steerable capability up to 45° elevation angle. The measured results agree well with the simulated counterparts. For demonstration, four different steering cases are presented as examples by manually adjusting the rotation angle of the RA elements. The maximum measured antenna gain is 26.2dBi, corresponding to an aperture efficiency of 66%. A 1.3 dB gain drop was measured during beam scanning from 0° to 40°.
Jan 2023Published in IEEE Antennas and Wireless Propagation Letters volume 22 issue 1 on pages 129-133. 10.1109/LAWP.2022.3204617