Title :
Wideband circularly polarised antenna using two linked annular slots
Author_Institution :
Electr. Eng., Tatung Univ., Taipei, Taiwan
Abstract :
An annular-slot antenna composed of two linked annular slots is presented. The return loss and the axial-ratio bandwidths are enhanced by tuning the distance between the two centres of the two annular slots. Under the optimum condition, the two circular patches associated with the two annular slots are found to be separated from each other. The measured 3 dB axial-ratio bandwidth is 1.4 GHz (46.7 ) centred at 3 GHz.
Keywords :
broadband antennas; loop antennas; polarisation; slot antennas; annular-slot antenna; axial-ratio bandwidths; bandwidth 1.4 GHz; circular patches; circular polarisation; frequency 3 GHz; gain 3 dB; linked annular slots; return loss; wideband antenna;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2011.0994
