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Broadband circular polarized reflectarray based on multi‐resonance unit
Author(s) -
Liao Tao,
Zhang ZhiQiang,
Jiao YongChang,
Yan YangDong,
Chen GuanTao,
Weng ZiBin
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22618
Subject(s) - broadband , optics , bandwidth (computing) , axial ratio , physics , circular polarization , materials science , telecommunications , engineering , microstrip
Abstract In this paper, a broadband circular polarized (CP) reflectarray using a linear polarized (LP) feed is proposed. First, a single‐layer broadband dual‐line polarized reflectarray unit is designed. This unit converts the LP incident waves into CP reflected waves by providing a phase difference of 90° in the orthogonal direction components of the incident waves. Based on the units proposed, a 109‐element reflectarray was designed and fabricated. The measured results indicate that the reflectarray has a 1‐dB gain bandwidth of 9.15 to 12.79 GHz, or equivalent to a bandwidth of 33.2%. Its 3‐dB axial ratio (AR) bandwidth for CP operation is 37% (9.06‐13.19 GHz). The reflectarray antenna has a peak gain of 23.53 dBi and its highest aperture efficiency is 64.1% achieved at 10 GHz.