Applied Sciences (Oct 2022)

T-Type Vertical Wall for Decoupling and Pattern Correction of Patch Antenna

  • Yiying Wang,
  • Shengfei Zhang,
  • Bo Wang,
  • Dun Lan,
  • Xinhua Yu,
  • Jinjun Mo,
  • Ahmed A. Kishk

DOI
https://doi.org/10.3390/app122110732
Journal volume & issue
Vol. 12, no. 21
p. 10732

Abstract

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The requirements of 5G/6G promote progress in the miniaturization of the antenna array, which promotes the development of a closely spaced decoupling technique. However, the present techniques face the common problem of beam tilt if the spacing is close. Thus, a pattern-corrected, closely-spaced technique is proposed in this paper for the two patch antennas with the λ0/20 edge-to-edge distance of the H-plane. The corresponding structure, which is inserted at the center of the spacing, consists of a vertical wall with a single substrate and two symmetrical T-type metals, and a slot at the center is reserved to adequately accommodate the vertical wall. The vertical strip at the other end of the T-type metal is connected to the ground of the patch antenna, while the parallel strip is placed exactly above the patch substrate. After an exact analysis, a prototype was fabricated and measured, and the results showed that the measurements agreed well with those of the simulations, the decoupling coefficients in the 5.8 GHz band were below −20 dB, and the measured radiation pattern at 5.81 GHz was corrected to the broadside from 28° and the maximum realized gain was 5.30 dB.

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