Title :
Printed triple-band circularly polarised antenna for wireless systems
Author :
Bao, X.L. ; Ammann, M.J.
Author_Institution :
Antenna & High Freq. Res. Centre, Dublin Inst. of Technol., Dublin, Ireland
Abstract :
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.
Keywords :
UHF antennas; microstrip antennas; microwave antennas; multifrequency antennas; radio networks; VSWR; bandwidth 15 MHz; bandwidth 36 MHz; bandwidth 44 MHz; electromagnetically coupled low-band patch; frequency 112 MHz; frequency 118 MHz; frequency 2.4 GHz; frequency 3.5 GHz; frequency 427 MHz; frequency 5.7 GHz; impedance bandwidths; printed triple-band circularly polarised antenna; probe-fed dual-band patch; substrate layers; triple-band circularly polarised microstrip patch antenna; voltage standing wave ratio; wireless systems;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.3103
