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Circularly polarised patch antenna array using proximity-coupled L-strip line feed

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3 Author(s)
Lo, W.K. ; Wireless Commun. Res. Centr, City Univ. of Hong Kong, Kowloon, China ; Chan, C.H. ; Luk, K.M.

A microstrip antenna array for circular polarisation (CP) using a proximity L-strip line feed is proposed and experimentally investigated. By placing a cross-slot with unequal slot lengths on the circular patch, circular polarisation can be excited. Also, a sequential rotation technique is adopted for the design of this CP antenna array to widen the bandwidth. The impedance and axial ratio bandwidth values are 78 and 16.15%, respectively. The boresight axial ratio is 0.4 dB at 1.91 GHz

Published in:

Electronics Letters  (Volume:36 ,  Issue: 14 )