Open AccessCircularly polarised sequential array with enhanced gain and bandwidth for applications in C ‐band
Author(s) -
Maddio Stefano,
Pelosi Giuseppe,
Selleri Stefano
Publication year - 2020
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.2020.0450
Subject(s) - broadband , bandwidth (computing) , frequency band , array gain , antenna array , high gain antenna , center frequency , electronic engineering , antenna gain , optics , dielectric , engineering , acoustics , antenna (radio) , physics , optoelectronics , microstrip antenna , electrical engineering , telecommunications , antenna efficiency , band pass filter
This study presents a single‐layer via‐less antenna array operating in circular polarisation for wide‐band operation in C ‐band. The antenna comprises 2 × 2 disc based elements arranged in a sequential rotation architecture. Each element is tuned to exhibit multiple resonances with good circular polarisation performance over a broadband of frequencies. A proper feeding network is then designed so that the resulting array is capable of a wide‐band operation and enhanced gain, equalising the frequency response of the set of elements. Simulations are validated by fabricating and measuring a prototype realised on a commercial FR408 dielectric substrate. Notwithstanding a dimension of only 7 × 7cm 2 , that is only 1.66λ 0 2 at centre frequency, measured performance of the proposed array can be summarised in a gain better than 7 dB over an operation bandwidth of 24.45 % , which is an unmatched result, given the via‐less single‐layer technology and the specific available area.