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Broadband reflectarray composed of gap coupled elements with linear phase response
Author(s) -
Oh Seongwon
Publication year - 2017
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.30464
Subject(s) - broadband , bandwidth (computing) , optics , microwave , dipole , center frequency , phase (matter) , aperture (computer memory) , linear phase , phase response , materials science , physics , engineering , telecommunications , acoustics , band pass filter , quantum mechanics
A broadband reflectarray using gap coupled elements composed of a split ring and a dipole is proposed. The phase variation range of the reflected field from the element on a single layer is achieved larger than 418° by changing the dipole length in a split ring of a fixed size. The phase response of the field is proportional to the dipole length with a slow slope. Compared with multilayer elements and aperture coupled elements, it shows good linear phase response of the reflected field. To validate the proposed geometry, a prototype reflectarray is fabricated and measured. The maximum gain is 33.0 dB, and the 3 dB gain bandwidth is 19.0% at the center frequency of 20 GHz. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1045–1047, 2017