A Wideband, 1 bit Transmitarray Antenna Design with Flat Gain Response

Research output: Contribution to journalArticlepeer-review

Abstract

A wideband transmitarray antenna exploiting 1 bit polarization-rotation unit cell is proposed in this article. A printed antipodal fermi tapered slot antenna is introduced as the source feed. Considering the radiation characteristics of the source feed, system-level performances in terms of spillover, illumination, and aperture efficiencies are analyzed, revealing the inherent restriction of wideband operation. In order to obtain wideband performance, a novel three-layer polarization-rotation 1 bit unit cell is developed to introduce phase errors over the aperture, which act as one kind of degree-of-freedom during the system design. An optimization method is employed to further balance the overall phase errors experienced over a wide frequency band, resulting in a flat gain response. To verify the design concept, a 13 × 17-element (195 mm × 255 mm) antenna prototype is fabricated and measured with a realized gain of 22.5 dBi at 10 GHz and 1 dB fractional gain bandwidth of 37% achieved, demonstrating great potentials in many communication applications.

Original languageEnglish
Article number9099371
Pages (from-to)7046-7055
Number of pages10
JournalIEEE Transactions on Antennas and Propagation
Volume68
Issue number10
DOIs
Publication statusPublished - 2020 Oct

Keywords

  • Antenna arrays
  • periodic structures
  • polarization rotation
  • transmitarrays
  • wideband antennas

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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