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Circularly polarized array antenna with corporate-feed network and series-feed elements

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2 Author(s)
Ko Han Lu ; Inst. of Commun., Tatung Univ., Taipei, Taiwan ; The-Nan Chang

In this paper, corporate-feed circularly polarized microstrip array antennas are studied. The antenna element is a series-feed slot-coupled structure. Series feeding causes sequential rotation effect at the element level. Antenna elements are then used to form the subarray by applying sequential rotation to their feeding. Arrays having 4, 16, and 64 elements were made. The maximum achieved gains are 15.3, 21, and 25.4 dBic, respectively. All arrays have less than 15 dB return loss and 3 dB axial ratio from 10 to 13 GHz. The patterns are all quite symmetrical.

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Antennas and Propagation, IEEE Transactions on  (Volume:53 ,  Issue: 10 )