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Circularly polarised printed crossed dipole antennas with broadband axial ratio

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5 Author(s)
J. -W. Baik ; Dept. of Radio Commun. & Eng., Korea Univ., Seoul ; K. -J. Lee ; W. -S. Yoon ; T. -H. Lee
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A novel printed crossed dipole with broad circular polarisation (CP) is proposed. This dipole is also utilised in 1 times 2 and 2 times 2 array antennas. The proposed dipole can produce CP because of its sequentially rotated configuration. The broadband CP performance is achieved because of a parasitic dipole crossing over the original dipole with a 90deg phase delay line. The experimental results show that single, 1 times 2, and 2 times 2 antennas yield bandwidths of 15.6, 24.5, and 39.2% for 3 dB axial ratio, respectively.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 13 )