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Reduction of cross‐polarization in offset reflectarrays using two layers of varying‐sized patches
Author(s) -
Tienda C.,
Encinar Jose A.,
Barba M.,
Arrebola M.
Publication year - 2012
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.27106
Subject(s) - linear polarization , offset (computer science) , polarization (electrochemistry) , optics , microwave , materials science , physics , engineering , telecommunications , computer science , chemistry , laser , programming language
An offset‐fed reflectarray demonstrator with reduced cross‐polarization has been designed, manufactured, and tested.It is demonstrated that the cross‐polarization is significantly reduced by using two layers of varying‐sized patches and adjusting the patch dimensions not only to shape the beam in dual‐linear polarization but also to produce a cancellation of the cross‐polarized reflected field in those zones in which the maximum cross‐polarization is produced. The proposed technique provides a reduction better than 5 dB in the cross‐polarization for both linear polarizations. The measured radiation patterns are in good agreement with the theoretical predictions, and show a cross‐polar discrimination better than 30 dB in the 12.97–14.25 GHz frequency band. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2449–2454, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27106