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Broadband circularly polarized beam‐steering antenna array for wireless applications
Author(s) -
Aribi T.,
NaserMoghadasi M.,
Sadeghzadeh R. A.
Publication year - 2014
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.28707
Subject(s) - broadband , antenna array , physics , turnstile antenna , optics , bandwidth (computing) , microwave , axial ratio , circular polarization , antenna measurement , electrical engineering , antenna (radio) , optoelectronics , antenna factor , engineering , telecommunications , microstrip
ABSTRACT This article describes the implementation of a broadband circularly polarized (CP) antenna array for switched beam applications. The antenna comprises of four identical CP slot elements in a 2 × 2 configuration that uses a 4 × 4 feeding network. Each CP slot element in the array is sequentially rotated with respect to each other to enhance the antenna's axial‐ratio (AR) bandwidth. Measured results confirm the array exhibits an impedance bandwidth of 2.25 GHz that extends over the frequency range 4.6–6.85 GHz (∼40%) for S 11 ≤ −10 dB, and 3 dB AR bandwidth of 1.7 GHz that extends between 4.8–6.5 GHz (∼30%). The antenna's gain is in excess of 6.8 dBi between 5–6 GHz. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2813–2817, 2014