Open AccessWide‐band circularly polarised antenna array using sequential phase feed structure and reinforced square radiating patch element
Author(s) -
Piroutiniya Asrin,
Rasekhmanesh Mohammad Hosein,
Mohammadi Pejman
Publication year - 2018
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2017.1075
Subject(s) - bandwidth (computing) , optics , axial ratio , physics , frequency band , patch antenna , antenna array , reflection coefficient , square (algebra) , phase (matter) , microstrip antenna , antenna (radio) , acoustics , circular polarization , telecommunications , computer science , microstrip , mathematics , geometry , quantum mechanics
A 2 × 2 circularly polarised (CP) antenna array with four square radiating patch elements has been introduced here. The array elements are sequentially rotated and have been fed by a simple single‐layer feeding network with sequential phase structure. This feeding network generates successive phase difference at its four outputs. To have a wide CP bandwidth, the proposed method of feeding network has been combined with new simple tuning stubs which are embedded in radiating patch elements. The common reflection coefficient bandwidth ( S 11 < − 10dB ) and axial ratio (AR) bandwidth (AR <3 dB) is 1000 MHz which covers 1.5–2.5 GHz frequency band and according to the centre frequency of 1.8 GHz, the frequency bandwidth is ∼55.5%. Furthermore, the peak gain of the proposed antenna array is ∼7.5 dBi at the frequency range of 1.7–2.3 GHz.