Dual-Band Beam-Scanning Antenna at Ka-Band by Rotation of Two Transmitarrays

Peipei Wang, Wu Ren*, Qingyun Zeng, Zhenghui Xue, Weiming Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A dual-band beam-scanning antenna by rotation of two transmintarrays (TAs) operating at 20 and 30 GHz has been presented in this letter. TA's unit cell has three metal layers and demonstrates almost completely independent performance at two frequency bands. Two designed TAs have unit cells of different sizes to achieve dual-band with different linear phases. By rotating the two TAs synchronously around the axis orthogonal to the planes of the TAs, it enables two-dimensional (2-D) beam scanning with maximum scanning angles of ±40°. The achieved simulated peak gains are 19.9 dBi, 20.5 dBi and 22.5 dBi, 23.2 dBi at phi = 0°, phi = 90° at 20 and 30 GHz, respectively. The maximum beam scanning losses are 1.7 dB, 2.6 dB and 1.5 dB, 2.7 dB. Moreover, the two beams at the two frequencies can basically point to the same direction at the same time. To validate the design, a prototype is fabricated and tested. The measured results are in good agreement with the simulated results.

Original languageEnglish
Pages (from-to)1792-1796
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Volume21
Issue number9
DOIs
Publication statusPublished - 1 Sept 2022

Keywords

  • Beam scanning
  • Ka-band
  • dual-band
  • transmitarray (TA)
  • two-dimensional (2-D)

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