Nonuniform FSS-Backed Reflectarray With Synthesized Phase and Amplitude Distribution

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

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Original languageEnglish
Pages (from-to)6883-6892
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number12
Online published24 Sep 2018
Publication statusPublished - Dec 2018


A nonuniform frequency selective surface (FSS)-backed reflectarray with both amplitude and phase con-trols for beam shaping is presented in this paper. In the process of element design, a dual-resonance reflectarray element backed by a loop FSS is studied. The proposed reflectarray element can achieve a reflection phase range of 570° and an amplitude control range over 10dB, by tuning the dimensions of the upper reflec-tarray and lower FSS layers. In the process of reflectarray syn-thesis, a complex amplitude synthesis (CAS) technique, based on the modified alternating projection method (APM), is developed to take into account the physically realizable amplitude and phase controls of the FSS-backed element for optimizing the amplitude and phase distributions on the reflectarray aperture. A nonuni-form FSS-backed 16×16-element reflectarray with a sector beam in the azimuth plane and a pencil beam in the elevation plane is designed and fabricated. The simulated and measured results reveal that the proposed reflectarray antenna offers distinguish-ing features in terms of high-quality pattern with lower side lobe level (SLL), lower cross-polarization as well as lower radar cross section (RCS), compared to the reflectarray designed by the con-ventional phase-only synthesis (POS) technique.

Research Area(s)

  • Amplitude control, Antenna radiation patterns, Feeds, Frequency selective surface (FSS), Frequency selective surfaces, reflectarray, Reflection, Reflector antennas, Resonant frequency, shaped beam, Substrates