A Circularly Polarized 1-Bit Electronically Reconfigurable Reflectarray Based on Electromagnetic Element Rotation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Fan Wu
  • Rong Lu
  • Jingxue Wang
  • Zhi Hao Jiang
  • Wei Hong

Detail(s)

Original languageEnglish
Number of pages11
Journal / PublicationIEEE Transactions on Antennas and Propagation
Online published5 Apr 2021
Publication statusOnline published - 5 Apr 2021

Abstract

A circularly polarized (CP) reflectarray with two-dimensional (2-D) electronically steerable beam is reported. The reconfigurable CP reflectarray element is realized using a circular-patch-based structure with PIN diodes incorporated. A new electronical phase manipulation method is proposed based on the element rotation technique and by additionally exploiting symmetries in the field distribution of the element’s fundamental resonant mode. Element rotation can be equivalently achieved by altering the biasing voltage and changing the electromagnetic behavior of the reflective phasing cell. The proposed design approach brings about simplification in the element configuration, leading to a reduction of the number of required diodes by a factor of one half. Practical concerns of the element and biasing complexity as well as the insertion loss are, therefore, well handled. A fully functional 16×16 reconfigurable CP reflectarray is designed, fabricated and tested to validate the concept. Good beam focusing and 2-D dynamic beam steering capabilities are confirmed through experiments, along with decent polarization purity and comparatively high aperture efficiency. The proposed simple and robust design could be attractive for implementing light-weight, low-cost, and large-scale 2-D reconfigurable CP reflectarrays.

Research Area(s)

  • Beam steering, circular polarization, Electromagnetics, high-gain antenna, patch antenna, Phased arrays, PIN photodiodes, Pins, reconfigurable reflectarray, Reflection, Reflector antennas, Substrates

Citation Format(s)