Broadband reflectarray antenna using subwavelength elements based on double square meander-line rings

Pei-Yuan Qin, Y. Jay Guo, Andrew R. Weily

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

A linearly polarized broadband reflectarray is presented employing a novel single layer subwavelength phase shifting element. The size of the element is a fifth of a wavelength at the center frequency of 10 GHz and the element consists of double concentric square rings of meander lines. By changing the length of the meander line, a 420° phase variation range is achieved at the center frequency. This characteristic makes the proposed configuration unique, as most of the reported subwavelength reflectarray elements can only realize a phase range far less than 360°. In addition, the slope of the phase response remains almost constant from 9 to 11 GHz, demonstrating a broadband property. A 48 × 48-element reflectarray antenna is simulated, fabricated, and measured. Good agreement is obtained between simulated and measured results. A measured 1.5-dB gain bandwidth of 18% and 56.5% aperture efficiency is achieved.

Original languageEnglish
Pages (from-to)378-383
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Volume64
Issue number1
DOIs
Publication statusPublished - Jan 2016
Externally publishedYes

Keywords

  • Double square ring
  • meander line
  • microstrip
  • reflectarray antenna
  • subwavelength

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