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Compact loaded slot ring antenna for circularly polarised radiation

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2 Author(s)
Xue, Q. ; State Key Lab. of Millimeter Waves, City Univ. of Hong Kong, Kowloon, China ; Qu, S.-W.

A novel slot-ring circularly polarised antenna is reported. With sectorial slots loading, the axial ratio (AR) bandwidth is increased and the circumference of the slot-ring is also reduced to 0.5 lambda0 (lambda0 is the free-space wavelength at the centre frequency). The antenna features a 22.4% impedance bandwidth for |S 11| les -10 dB, a 10.6% bandwidth for AR les 3 dB and stable radiation patterns over the whole operating band.

Published in:

Electronics Letters  (Volume:45 ,  Issue: 17 )