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Extremely low-profile helix radiating a circularly polarized wave

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5 Author(s)
Nakano, H. ; Coll. of Eng., Hosei Univ., Tokyo, Japan ; Takeda, H. ; Honma, T. ; Mimaki, H.
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It is shown that the combination of low pitch and a small number of turns realizes a low-profile helix as a radiating element of circular polarization. A two-turn helix of 4° pitch angle shows a bandwidth of 12% for a 3 dB axial-ratio criterion. The numerical results presented lead to new aspects of a low-pitch helix as an effective radiating element

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Antennas and Propagation, IEEE Transactions on  (Volume:39 ,  Issue: 6 )