Open AccessPrinted triple‐band circularly polarised antenna for wireless systems
Author(s) -
Bao X.L.,
Ammann M.J.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2014.3103
Subject(s) - standing wave ratio , microstrip antenna , patch antenna , axial ratio , materials science , optics , antenna (radio) , multi band device , electrical impedance , physics , microstrip , optoelectronics , circular polarization , electrical engineering , engineering , quantum mechanics
A triple‐band circularly polarised microstrip patch antenna operating in the 2.4, 3.5 and 5.7 GHz bands is presented. The antenna consists of two substrate layers with an electromagnetically coupled low‐band patch in the middle layer and a probe‐fed dual‐band patch on the top layer. The impedance bandwidths (voltage standing wave ratio (VSWR) < 2.5) for the three frequency bands are 112, 118 and 427 MHz with 3 dB axial‐ratio bandwidths of 15, 44 and 36 MHz, respectively. The peak gains across the operating bands are 4.2, 5.5 and 4 dBic, respectively.